-
Notifications
You must be signed in to change notification settings - Fork 6
/
index.html
895 lines (820 loc) · 43 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
<!doctype html><html lang="en">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>DataCue API</title>
<meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport">
<link href="https://www.w3.org/StyleSheets/TR/2016/cg-draft" rel="stylesheet">
<meta content="Bikeshed version b9f8371cc, updated Fri Mar 5 18:35:23 2021 -0800" name="generator">
<link href="https://wicg.github.io/datacue/" rel="canonical">
<meta content="fb2f72a461332b5d3fb6984cd4b02e2786f4317f" name="document-revision">
<style>/* style-autolinks */
.css.css, .property.property, .descriptor.descriptor {
color: var(--a-normal-text);
font-size: inherit;
font-family: inherit;
}
.css::before, .property::before, .descriptor::before {
content: "‘";
}
.css::after, .property::after, .descriptor::after {
content: "’";
}
.property, .descriptor {
/* Don't wrap property and descriptor names */
white-space: nowrap;
}
.type { /* CSS value <type> */
font-style: italic;
}
pre .property::before, pre .property::after {
content: "";
}
[data-link-type="property"]::before,
[data-link-type="propdesc"]::before,
[data-link-type="descriptor"]::before,
[data-link-type="value"]::before,
[data-link-type="function"]::before,
[data-link-type="at-rule"]::before,
[data-link-type="selector"]::before,
[data-link-type="maybe"]::before {
content: "‘";
}
[data-link-type="property"]::after,
[data-link-type="propdesc"]::after,
[data-link-type="descriptor"]::after,
[data-link-type="value"]::after,
[data-link-type="function"]::after,
[data-link-type="at-rule"]::after,
[data-link-type="selector"]::after,
[data-link-type="maybe"]::after {
content: "’";
}
[data-link-type].production::before,
[data-link-type].production::after,
.prod [data-link-type]::before,
.prod [data-link-type]::after {
content: "";
}
[data-link-type=element],
[data-link-type=element-attr] {
font-family: Menlo, Consolas, "DejaVu Sans Mono", monospace;
font-size: .9em;
}
[data-link-type=element]::before { content: "<" }
[data-link-type=element]::after { content: ">" }
[data-link-type=biblio] {
white-space: pre;
}</style>
<style>/* style-colors */
/* Any --*-text not paired with a --*-bg is assumed to have a transparent bg */
:root {
color-scheme: light dark;
--text: black;
--bg: white;
--unofficial-watermark: url(https://www.w3.org/StyleSheets/TR/2016/logos/UD-watermark);
--logo-bg: #1a5e9a;
--logo-active-bg: #c00;
--logo-text: white;
--tocnav-normal-text: #707070;
--tocnav-normal-bg: var(--bg);
--tocnav-hover-text: var(--tocnav-normal-text);
--tocnav-hover-bg: #f8f8f8;
--tocnav-active-text: #c00;
--tocnav-active-bg: var(--tocnav-normal-bg);
--tocsidebar-text: var(--text);
--tocsidebar-bg: #f7f8f9;
--tocsidebar-shadow: rgba(0,0,0,.1);
--tocsidebar-heading-text: hsla(203,20%,40%,.7);
--toclink-text: var(--text);
--toclink-underline: #3980b5;
--toclink-visited-text: var(--toclink-text);
--toclink-visited-underline: #054572;
--heading-text: #005a9c;
--hr-text: var(--text);
--algo-border: #def;
--del-text: red;
--del-bg: transparent;
--ins-text: #080;
--ins-bg: transparent;
--a-normal-text: #034575;
--a-normal-underline: #707070;
--a-visited-text: var(--a-normal-text);
--a-visited-underline: #bbb;
--a-hover-bg: rgba(75%, 75%, 75%, .25);
--a-active-text: #c00;
--a-active-underline: #c00;
--blockquote-border: silver;
--blockquote-bg: transparent;
--blockquote-text: currentcolor;
--issue-border: #e05252;
--issue-bg: #fbe9e9;
--issue-text: var(--text);
--issueheading-text: #831616;
--example-border: #e0cb52;
--example-bg: #fcfaee;
--example-text: var(--text);
--exampleheading-text: #574b0f;
--note-border: #52e052;
--note-bg: #e9fbe9;
--note-text: var(--text);
--noteheading-text: hsl(120, 70%, 30%);
--notesummary-underline: silver;
--assertion-border: #aaa;
--assertion-bg: #eee;
--assertion-text: black;
--advisement-border: orange;
--advisement-bg: #fec;
--advisement-text: var(--text);
--advisementheading-text: #b35f00;
--warning-border: red;
--warning-bg: hsla(40,100%,50%,0.95);
--warning-text: var(--text);
--amendment-border: #330099;
--amendment-bg: #F5F0FF;
--amendment-text: var(--text);
--amendmentheading-text: #220066;
--def-border: #8ccbf2;
--def-bg: #def;
--def-text: var(--text);
--defrow-border: #bbd7e9;
--datacell-border: silver;
--indexinfo-text: #707070;
--indextable-hover-text: black;
--indextable-hover-bg: #f7f8f9;
--outdatedspec-bg: rgba(0, 0, 0, .5);
--outdatedspec-text: black;
--outdated-bg: maroon;
--outdated-text: white;
--outdated-shadow: red;
--editedrec-bg: darkorange;
}</style>
<style>/* style-counters */
body {
counter-reset: example figure issue;
}
.issue {
counter-increment: issue;
}
.issue:not(.no-marker)::before {
content: "Issue " counter(issue);
}
.example {
counter-increment: example;
}
.example:not(.no-marker)::before {
content: "Example " counter(example);
}
.invalid.example:not(.no-marker)::before,
.illegal.example:not(.no-marker)::before {
content: "Invalid Example" counter(example);
}
figcaption {
counter-increment: figure;
}
figcaption:not(.no-marker)::before {
content: "Figure " counter(figure) " ";
}</style>
<style>/* style-dfn-panel */
:root {
--dfnpanel-bg: #ddd;
--dfnpanel-text: var(--text);
}
.dfn-panel {
position: absolute;
z-index: 35;
height: auto;
width: -webkit-fit-content;
width: fit-content;
max-width: 300px;
max-height: 500px;
overflow: auto;
padding: 0.5em 0.75em;
font: small Helvetica Neue, sans-serif, Droid Sans Fallback;
background: var(--dfnpanel-bg);
color: var(--dfnpanel-text);
border: outset 0.2em;
}
.dfn-panel:not(.on) { display: none; }
.dfn-panel * { margin: 0; padding: 0; text-indent: 0; }
.dfn-panel > b { display: block; }
.dfn-panel a { color: var(--dfnpanel-text); }
.dfn-panel a:not(:hover) { text-decoration: none !important; border-bottom: none !important; }
.dfn-panel > b + b { margin-top: 0.25em; }
.dfn-panel ul { padding: 0; }
.dfn-panel li { list-style: inside; }
.dfn-panel.activated {
display: inline-block;
position: fixed;
left: .5em;
bottom: 2em;
margin: 0 auto;
max-width: calc(100vw - 1.5em - .4em - .5em);
max-height: 30vh;
}
.dfn-paneled { cursor: pointer; }
</style>
<style>/* style-md-lists */
/* This is a weird hack for me not yet following the commonmark spec
regarding paragraph and lists. */
[data-md] > :first-child {
margin-top: 0;
}
[data-md] > :last-child {
margin-bottom: 0;
}</style>
<style>/* style-selflinks */
:root {
--selflink-text: white;
--selflink-bg: gray;
--selflink-hover-text: black;
}
.heading, .issue, .note, .example, li, dt {
position: relative;
}
a.self-link {
position: absolute;
top: 0;
left: calc(-1 * (3.5rem - 26px));
width: calc(3.5rem - 26px);
height: 2em;
text-align: center;
border: none;
transition: opacity .2s;
opacity: .5;
}
a.self-link:hover {
opacity: 1;
}
.heading > a.self-link {
font-size: 83%;
}
li > a.self-link {
left: calc(-1 * (3.5rem - 26px) - 2em);
}
dfn > a.self-link {
top: auto;
left: auto;
opacity: 0;
width: 1.5em;
height: 1.5em;
background: var(--selflink-bg);
color: var(--selflink-text);
font-style: normal;
transition: opacity .2s, background-color .2s, color .2s;
}
dfn:hover > a.self-link {
opacity: 1;
}
dfn > a.self-link:hover {
color: var(--selflink-hover-text);
}
a.self-link::before { content: "¶"; }
.heading > a.self-link::before { content: "§"; }
dfn > a.self-link::before { content: "#"; }
</style>
<style>/* style-syntax-highlighting */
pre.idl.highlight {
background: var(--borderedblock-bg, var(--def-bg));
}
code.highlight { padding: .1em; border-radius: .3em; }
pre.highlight, pre > code.highlight { display: block; padding: 1em; margin: .5em 0; overflow: auto; border-radius: 0; }
.highlight:not(.idl) { background: rgba(0, 0, 0, .03); }
c-[a] { color: #990055 } /* Keyword.Declaration */
c-[b] { color: #990055 } /* Keyword.Type */
c-[c] { color: #708090 } /* Comment */
c-[d] { color: #708090 } /* Comment.Multiline */
c-[e] { color: #0077aa } /* Name.Attribute */
c-[f] { color: #669900 } /* Name.Tag */
c-[g] { color: #222222 } /* Name.Variable */
c-[k] { color: #990055 } /* Keyword */
c-[l] { color: #000000 } /* Literal */
c-[m] { color: #000000 } /* Literal.Number */
c-[n] { color: #0077aa } /* Name */
c-[o] { color: #999999 } /* Operator */
c-[p] { color: #999999 } /* Punctuation */
c-[s] { color: #a67f59 } /* Literal.String */
c-[t] { color: #a67f59 } /* Literal.String.Single */
c-[u] { color: #a67f59 } /* Literal.String.Double */
c-[cp] { color: #708090 } /* Comment.Preproc */
c-[c1] { color: #708090 } /* Comment.Single */
c-[cs] { color: #708090 } /* Comment.Special */
c-[kc] { color: #990055 } /* Keyword.Constant */
c-[kn] { color: #990055 } /* Keyword.Namespace */
c-[kp] { color: #990055 } /* Keyword.Pseudo */
c-[kr] { color: #990055 } /* Keyword.Reserved */
c-[ld] { color: #000000 } /* Literal.Date */
c-[nc] { color: #0077aa } /* Name.Class */
c-[no] { color: #0077aa } /* Name.Constant */
c-[nd] { color: #0077aa } /* Name.Decorator */
c-[ni] { color: #0077aa } /* Name.Entity */
c-[ne] { color: #0077aa } /* Name.Exception */
c-[nf] { color: #0077aa } /* Name.Function */
c-[nl] { color: #0077aa } /* Name.Label */
c-[nn] { color: #0077aa } /* Name.Namespace */
c-[py] { color: #0077aa } /* Name.Property */
c-[ow] { color: #999999 } /* Operator.Word */
c-[mb] { color: #000000 } /* Literal.Number.Bin */
c-[mf] { color: #000000 } /* Literal.Number.Float */
c-[mh] { color: #000000 } /* Literal.Number.Hex */
c-[mi] { color: #000000 } /* Literal.Number.Integer */
c-[mo] { color: #000000 } /* Literal.Number.Oct */
c-[sb] { color: #a67f59 } /* Literal.String.Backtick */
c-[sc] { color: #a67f59 } /* Literal.String.Char */
c-[sd] { color: #a67f59 } /* Literal.String.Doc */
c-[se] { color: #a67f59 } /* Literal.String.Escape */
c-[sh] { color: #a67f59 } /* Literal.String.Heredoc */
c-[si] { color: #a67f59 } /* Literal.String.Interpol */
c-[sx] { color: #a67f59 } /* Literal.String.Other */
c-[sr] { color: #a67f59 } /* Literal.String.Regex */
c-[ss] { color: #a67f59 } /* Literal.String.Symbol */
c-[vc] { color: #0077aa } /* Name.Variable.Class */
c-[vg] { color: #0077aa } /* Name.Variable.Global */
c-[vi] { color: #0077aa } /* Name.Variable.Instance */
c-[il] { color: #000000 } /* Literal.Number.Integer.Long */
</style>
<style>/* style-darkmode */
@media (prefers-color-scheme: dark) {
:root {
--text: #ddd;
--bg: black;
--unofficial-watermark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cg fill='%23100808' transform='translate(200 200) rotate(-45) translate(-200 -200)' stroke='%23100808' stroke-width='3'%3E%3Ctext x='50%25' y='220' style='font: bold 70px sans-serif; text-anchor: middle; letter-spacing: 6px;'%3EUNOFFICIAL%3C/text%3E%3Ctext x='50%25' y='305' style='font: bold 70px sans-serif; text-anchor: middle; letter-spacing: 6px;'%3EDRAFT%3C/text%3E%3C/g%3E%3C/svg%3E");
--logo-bg: #1a5e9a;
--logo-active-bg: #c00;
--logo-text: white;
--tocnav-normal-text: #999;
--tocnav-normal-bg: var(--bg);
--tocnav-hover-text: var(--tocnav-normal-text);
--tocnav-hover-bg: #080808;
--tocnav-active-text: #f44;
--tocnav-active-bg: var(--tocnav-normal-bg);
--tocsidebar-text: var(--text);
--tocsidebar-bg: #080808;
--tocsidebar-shadow: rgba(255,255,255,.1);
--tocsidebar-heading-text: hsla(203,20%,40%,.7);
--toclink-text: var(--text);
--toclink-underline: #6af;
--toclink-visited-text: var(--toclink-text);
--toclink-visited-underline: #054572;
--heading-text: #8af;
--hr-text: var(--text);
--algo-border: #456;
--del-text: #f44;
--del-bg: transparent;
--ins-text: #4a4;
--ins-bg: transparent;
--a-normal-text: #6af;
--a-normal-underline: #555;
--a-visited-text: var(--a-normal-text);
--a-visited-underline: var(--a-normal-underline);
--a-hover-bg: rgba(25%, 25%, 25%, .2);
--a-active-text: #f44;
--a-active-underline: var(--a-active-text);
--borderedblock-bg: rgba(255, 255, 255, .05);
--blockquote-border: silver;
--blockquote-bg: var(--borderedblock-bg);
--blockquote-text: currentcolor;
--issue-border: #e05252;
--issue-bg: var(--borderedblock-bg);
--issue-text: var(--text);
--issueheading-text: hsl(0deg, 70%, 70%);
--example-border: hsl(50deg, 90%, 60%);
--example-bg: var(--borderedblock-bg);
--example-text: var(--text);
--exampleheading-text: hsl(50deg, 70%, 70%);
--note-border: hsl(120deg, 100%, 35%);
--note-bg: var(--borderedblock-bg);
--note-text: var(--text);
--noteheading-text: hsl(120, 70%, 70%);
--notesummary-underline: silver;
--assertion-border: #444;
--assertion-bg: var(--borderedblock-bg);
--assertion-text: var(--text);
--advisement-border: orange;
--advisement-bg: #222218;
--advisement-text: var(--text);
--advisementheading-text: #f84;
--warning-border: red;
--warning-bg: hsla(40,100%,20%,0.95);
--warning-text: var(--text);
--amendment-border: #330099;
--amendment-bg: #080010;
--amendment-text: var(--text);
--amendmentheading-text: #cc00ff;
--def-border: #8ccbf2;
--def-bg: #080818;
--def-text: var(--text);
--defrow-border: #136;
--datacell-border: silver;
--indexinfo-text: #aaa;
--indextable-hover-text: var(--text);
--indextable-hover-bg: #181818;
--outdatedspec-bg: rgba(255, 255, 255, .5);
--outdatedspec-text: black;
--outdated-bg: maroon;
--outdated-text: white;
--outdated-shadow: red;
--editedrec-bg: darkorange;
}
/* In case a transparent-bg image doesn't expect to be on a dark bg,
which is quite common in practice... */
img { background: white; }
}
@media (prefers-color-scheme: dark) {
:root {
--selflink-text: black;
--selflink-bg: silver;
--selflink-hover-text: white;
}
}
@media (prefers-color-scheme: dark) {
:root {
--dfnpanel-bg: #222;
--dfnpanel-text: var(--text);
}
}
@media (prefers-color-scheme: dark) {
.highlight:not(.idl) { background: rgba(255, 255, 255, .05); }
c-[a] { color: #d33682 } /* Keyword.Declaration */
c-[b] { color: #d33682 } /* Keyword.Type */
c-[c] { color: #2aa198 } /* Comment */
c-[d] { color: #2aa198 } /* Comment.Multiline */
c-[e] { color: #268bd2 } /* Name.Attribute */
c-[f] { color: #b58900 } /* Name.Tag */
c-[g] { color: #cb4b16 } /* Name.Variable */
c-[k] { color: #d33682 } /* Keyword */
c-[l] { color: #657b83 } /* Literal */
c-[m] { color: #657b83 } /* Literal.Number */
c-[n] { color: #268bd2 } /* Name */
c-[o] { color: #657b83 } /* Operator */
c-[p] { color: #657b83 } /* Punctuation */
c-[s] { color: #6c71c4 } /* Literal.String */
c-[t] { color: #6c71c4 } /* Literal.String.Single */
c-[u] { color: #6c71c4 } /* Literal.String.Double */
c-[ch] { color: #2aa198 } /* Comment.Hashbang */
c-[cp] { color: #2aa198 } /* Comment.Preproc */
c-[cpf] { color: #2aa198 } /* Comment.PreprocFile */
c-[c1] { color: #2aa198 } /* Comment.Single */
c-[cs] { color: #2aa198 } /* Comment.Special */
c-[kc] { color: #d33682 } /* Keyword.Constant */
c-[kn] { color: #d33682 } /* Keyword.Namespace */
c-[kp] { color: #d33682 } /* Keyword.Pseudo */
c-[kr] { color: #d33682 } /* Keyword.Reserved */
c-[ld] { color: #657b83 } /* Literal.Date */
c-[nc] { color: #268bd2 } /* Name.Class */
c-[no] { color: #268bd2 } /* Name.Constant */
c-[nd] { color: #268bd2 } /* Name.Decorator */
c-[ni] { color: #268bd2 } /* Name.Entity */
c-[ne] { color: #268bd2 } /* Name.Exception */
c-[nf] { color: #268bd2 } /* Name.Function */
c-[nl] { color: #268bd2 } /* Name.Label */
c-[nn] { color: #268bd2 } /* Name.Namespace */
c-[py] { color: #268bd2 } /* Name.Property */
c-[ow] { color: #657b83 } /* Operator.Word */
c-[mb] { color: #657b83 } /* Literal.Number.Bin */
c-[mf] { color: #657b83 } /* Literal.Number.Float */
c-[mh] { color: #657b83 } /* Literal.Number.Hex */
c-[mi] { color: #657b83 } /* Literal.Number.Integer */
c-[mo] { color: #657b83 } /* Literal.Number.Oct */
c-[sa] { color: #6c71c4 } /* Literal.String.Affix */
c-[sb] { color: #6c71c4 } /* Literal.String.Backtick */
c-[sc] { color: #6c71c4 } /* Literal.String.Char */
c-[dl] { color: #6c71c4 } /* Literal.String.Delimiter */
c-[sd] { color: #6c71c4 } /* Literal.String.Doc */
c-[se] { color: #6c71c4 } /* Literal.String.Escape */
c-[sh] { color: #6c71c4 } /* Literal.String.Heredoc */
c-[si] { color: #6c71c4 } /* Literal.String.Interpol */
c-[sx] { color: #6c71c4 } /* Literal.String.Other */
c-[sr] { color: #6c71c4 } /* Literal.String.Regex */
c-[ss] { color: #6c71c4 } /* Literal.String.Symbol */
c-[fm] { color: #268bd2 } /* Name.Function.Magic */
c-[vc] { color: #cb4b16 } /* Name.Variable.Class */
c-[vg] { color: #cb4b16 } /* Name.Variable.Global */
c-[vi] { color: #cb4b16 } /* Name.Variable.Instance */
c-[vm] { color: #cb4b16 } /* Name.Variable.Magic */
c-[il] { color: #657b83 } /* Literal.Number.Integer.Long */
}
</style>
<body class="h-entry">
<div class="head">
<p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2016/logos/W3C" width="72"> </a> </p>
<h1 class="p-name no-ref" id="title">DataCue API</h1>
<h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Draft Community Group Report, <time class="dt-updated" datetime="2021-03-08">8 March 2021</time></span></h2>
<div data-fill-with="spec-metadata">
<dl>
<dt>This version:
<dd><a class="u-url" href="https://wicg.github.io/datacue/">https://wicg.github.io/datacue/</a>
<dt>Issue Tracking:
<dd><a href="https://github.com/WICG/datacue/issues/">GitHub</a>
<dt class="editor">Editor:
<dd class="editor p-author h-card vcard"><a class="p-name fn u-email email" href="mailto:[email protected]">Chris Needham</a> (<a class="p-org org" href="https://www.bbc.co.uk">BBC</a>)
<dt>Participate:
<dd><a href="https://github.com/WICG/datacue">Git Repository.</a>
<dd><a href="https://github.com/WICG/datacue/issues/new">File an issue.</a>
<dt>Version History:
<dd><a href="https://github.com/WICG/datacue/commits">https://github.com/WICG/datacue/commits</a>
</dl>
</div>
<div data-fill-with="warning"></div>
<p class="copyright" data-fill-with="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2021 the Contributors to the DataCue API Specification, published by the <a href="https://www.w3.org/community/wicg/">Web Platform Incubator Community Group</a> under the <a href="https://www.w3.org/community/about/agreements/cla/">W3C Community Contributor License Agreement (CLA)</a>.
A human-readable <a href="http://www.w3.org/community/about/agreements/cla-deed/">summary</a> is available. </p>
<hr title="Separator for header">
</div>
<div class="p-summary" data-fill-with="abstract">
<h2 class="no-num no-toc no-ref heading settled" id="abstract"><span class="content">Abstract</span></h2>
<p>This document describes an API that allows web pages to associate
arbitrary timed data with audio or video media resources, and for exposing
timed data from media resources to web pages.</p>
</div>
<div data-fill-with="at-risk"></div>
<h2 class="no-num no-toc no-ref heading settled" id="status"><span class="content">Status of this document</span></h2>
<div data-fill-with="status">
<p> This specification was published by the <a href="https://www.w3.org/community/wicg/">Web Platform Incubator Community Group</a>.
It is not a W3C Standard nor is it on the W3C Standards Track.
Please note that under the <a href="https://www.w3.org/community/about/agreements/cla/">W3C Community Contributor License Agreement (CLA)</a> there is a limited opt-out and other conditions apply.
Learn more about <a href="http://www.w3.org/community/">W3C Community and Business Groups</a>. </p>
<p></p>
</div>
<div data-fill-with="at-risk"></div>
<nav data-fill-with="table-of-contents" id="toc">
<h2 class="no-num no-toc no-ref" id="contents">Table of Contents</h2>
<ol class="toc" role="directory">
<li><a href="#introduction"><span class="secno">1</span> <span class="content">Introduction</span></a>
<li><a href="#security-and-privacy"><span class="secno">2</span> <span class="content">Security and privacy considerations</span></a>
<li>
<a href="#api"><span class="secno">3</span> <span class="content">API</span></a>
<ol class="toc">
<li><a href="#datacue-interface"><span class="secno">3.1</span> <span class="content">The DataCue interface</span></a>
</ol>
<li>
<a href="#in-band-event-mappings"><span class="secno">4</span> <span class="content">In-band event mappings</span></a>
<ol class="toc">
<li><a href="#mpeg-dash-emsg"><span class="secno">4.1</span> <span class="content">MPEG-DASH emsg</span></a>
</ol>
<li>
<a href="#examples"><span class="secno">5</span> <span class="content">Examples</span></a>
<ol class="toc">
<li><a href="#app-generated-datacue-example"><span class="secno">5.1</span> <span class="content">Application-generated DataCues</span></a>
<li><a href="#in-band-emsg-example"><span class="secno">5.2</span> <span class="content">In-band MPEG-DASH emsg events</span></a>
</ol>
<li><a href="#acknowledgements"><span class="secno">6</span> <span class="content">Acknowledgements</span></a>
<li>
<a href="#w3c-conformance"><span class="secno"></span> <span class="content">Conformance</span></a>
<ol class="toc">
<li><a href="#w3c-conventions"><span class="secno"></span> <span class="content">Document conventions</span></a>
<li><a href="#w3c-conformant-algorithms"><span class="secno"></span> <span class="content">Conformant Algorithms</span></a>
</ol>
<li>
<a href="#index"><span class="secno"></span> <span class="content">Index</span></a>
<ol class="toc">
<li><a href="#index-defined-here"><span class="secno"></span> <span class="content">Terms defined by this specification</span></a>
<li><a href="#index-defined-elsewhere"><span class="secno"></span> <span class="content">Terms defined by reference</span></a>
</ol>
<li>
<a href="#references"><span class="secno"></span> <span class="content">References</span></a>
<ol class="toc">
<li><a href="#normative"><span class="secno"></span> <span class="content">Normative References</span></a>
</ol>
<li><a href="#idl-index"><span class="secno"></span> <span class="content">IDL Index</span></a>
</ol>
</nav>
<main>
<h2 class="heading settled" data-level="1" id="introduction"><span class="secno">1. </span><span class="content">Introduction</span><a class="self-link" href="#introduction"></a></h2>
<p>*This section is non-normative*</p>
<p>Media resources often contain one or more media-resource-specific tracks
containing data that browsers don’t render, but want to expose to script to
allow being dealt with.</p>
<p>TODO: ...</p>
<h2 class="heading settled" data-level="2" id="security-and-privacy"><span class="secno">2. </span><span class="content">Security and privacy considerations</span><a class="self-link" href="#security-and-privacy"></a></h2>
<p>*This section is non-normative.*</p>
<p>TODO: ...</p>
<h2 class="heading settled" data-level="3" id="api"><span class="secno">3. </span><span class="content">API</span><a class="self-link" href="#api"></a></h2>
<h3 class="heading settled" data-level="3.1" id="datacue-interface"><span class="secno">3.1. </span><span class="content">The DataCue interface</span><a class="self-link" href="#datacue-interface"></a></h3>
<pre class="idl highlight def">[<a class="idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#Exposed" id="ref-for-Exposed"><c- g>Exposed</c-></a>=<c- n>Window</c->]
<c- b>interface</c-> <dfn class="dfn-paneled idl-code" data-dfn-type="interface" data-export id="datacue"><code><c- g>DataCue</c-></code></dfn> : <a data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/media.html#texttrackcue" id="ref-for-texttrackcue"><c- n>TextTrackCue</c-></a> {
<dfn class="idl-code" data-dfn-for="DataCue" data-dfn-type="constructor" data-export data-lt="DataCue(startTime, endTime, value, type)|constructor(startTime, endTime, value, type)|DataCue(startTime, endTime, value)|constructor(startTime, endTime, value)" id="dom-datacue-datacue"><code><c- g>constructor</c-></code><a class="self-link" href="#dom-datacue-datacue"></a></dfn>(<a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-double" id="ref-for-idl-double"><c- b>double</c-></a> <dfn class="idl-code" data-dfn-for="DataCue/DataCue(startTime, endTime, value, type), DataCue/constructor(startTime, endTime, value, type), DataCue/DataCue(startTime, endTime, value), DataCue/constructor(startTime, endTime, value)" data-dfn-type="argument" data-export id="dom-datacue-datacue-starttime-endtime-value-type-starttime"><code><c- g>startTime</c-></code><a class="self-link" href="#dom-datacue-datacue-starttime-endtime-value-type-starttime"></a></dfn>, <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-unrestricted-double" id="ref-for-idl-unrestricted-double"><c- b>unrestricted</c-> <c- b>double</c-></a> <dfn class="idl-code" data-dfn-for="DataCue/DataCue(startTime, endTime, value, type), DataCue/constructor(startTime, endTime, value, type), DataCue/DataCue(startTime, endTime, value), DataCue/constructor(startTime, endTime, value)" data-dfn-type="argument" data-export id="dom-datacue-datacue-starttime-endtime-value-type-endtime"><code><c- g>endTime</c-></code><a class="self-link" href="#dom-datacue-datacue-starttime-endtime-value-type-endtime"></a></dfn>,
<a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-any" id="ref-for-idl-any"><c- b>any</c-></a> <dfn class="idl-code" data-dfn-for="DataCue/DataCue(startTime, endTime, value, type), DataCue/constructor(startTime, endTime, value, type), DataCue/DataCue(startTime, endTime, value), DataCue/constructor(startTime, endTime, value)" data-dfn-type="argument" data-export id="dom-datacue-datacue-starttime-endtime-value-type-value"><code><c- g>value</c-></code><a class="self-link" href="#dom-datacue-datacue-starttime-endtime-value-type-value"></a></dfn>, <c- b>optional</c-> <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-DOMString" id="ref-for-idl-DOMString"><c- b>DOMString</c-></a> <dfn class="idl-code" data-dfn-for="DataCue/DataCue(startTime, endTime, value, type), DataCue/constructor(startTime, endTime, value, type), DataCue/DataCue(startTime, endTime, value), DataCue/constructor(startTime, endTime, value)" data-dfn-type="argument" data-export id="dom-datacue-datacue-starttime-endtime-value-type-type"><code><c- g>type</c-></code><a class="self-link" href="#dom-datacue-datacue-starttime-endtime-value-type-type"></a></dfn>);
<c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-any" id="ref-for-idl-any①"><c- b>any</c-></a> <dfn class="idl-code" data-dfn-for="DataCue" data-dfn-type="attribute" data-export data-type="any" id="dom-datacue-value"><code><c- g>value</c-></code><a class="self-link" href="#dom-datacue-value"></a></dfn>;
<c- b>readonly</c-> <c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-DOMString" id="ref-for-idl-DOMString①"><c- b>DOMString</c-></a> <dfn class="idl-code" data-dfn-for="DataCue" data-dfn-type="attribute" data-export data-readonly data-type="DOMString" id="dom-datacue-type"><code><c- g>type</c-></code><a class="self-link" href="#dom-datacue-type"></a></dfn>;
};
</pre>
<h2 class="heading settled" data-level="4" id="in-band-event-mappings"><span class="secno">4. </span><span class="content">In-band event mappings</span><a class="self-link" href="#in-band-event-mappings"></a></h2>
<p>The following sections describe how various in-band message formats are mapped to the <code class="idl"><a data-link-type="idl" href="#datacue" id="ref-for-datacue">DataCue</a></code> API.</p>
<h3 class="heading settled" data-level="4.1" id="mpeg-dash-emsg"><span class="secno">4.1. </span><span class="content">MPEG-DASH emsg</span><a class="self-link" href="#mpeg-dash-emsg"></a></h3>
<p>The <code>emsg</code> data structure is defined in section 5.10.3.3 of <a data-link-type="biblio" href="#biblio-mpegdash">[MPEGDASH]</a>. Use of emsg within CMAF media is defined in section 7.4.5 of <a data-link-type="biblio" href="#biblio-mpegcmaf">[MPEGCMAF]</a>.</p>
<p>There are two versions in use, version 0 and 1:</p>
<pre>aligned(8) class DASHEventMessageBox extends FullBox ('emsg', version, flags = 0) {
if (version == 0) {
string scheme_id_uri;
string value;
unsigned int(32) timescale_v0;
unsigned int(32) presentation_time_delta;
unsigned int(32) event_duration;
unsigned int(32) id;
} else if (version == 1) {
unsigned int(32) timescale_v1;
unsigned int(64) presentation_time;
unsigned int(32) event_duration;
unsigned int(32) id;
string scheme_id_uri;
string value;
}
unsigned int(8) message_data[];
}
</pre>
<h2 class="heading settled" data-level="5" id="examples"><span class="secno">5. </span><span class="content">Examples</span><a class="self-link" href="#examples"></a></h2>
<h3 class="heading settled" data-level="5.1" id="app-generated-datacue-example"><span class="secno">5.1. </span><span class="content">Application-generated DataCues</span><a class="self-link" href="#app-generated-datacue-example"></a></h3>
<p>TODO: ...</p>
<h3 class="heading settled" data-level="5.2" id="in-band-emsg-example"><span class="secno">5.2. </span><span class="content">In-band MPEG-DASH emsg events</span><a class="self-link" href="#in-band-emsg-example"></a></h3>
<p>TODO: ...</p>
<h2 class="heading settled" data-level="6" id="acknowledgements"><span class="secno">6. </span><span class="content">Acknowledgements</span><a class="self-link" href="#acknowledgements"></a></h2>
<p>TODO: ...</p>
</main>
<div data-fill-with="conformance">
<h2 class="no-ref no-num heading settled" id="w3c-conformance"><span class="content">Conformance</span><a class="self-link" href="#w3c-conformance"></a></h2>
<h3 class="no-ref no-num heading settled" id="w3c-conventions"><span class="content">Document conventions</span><a class="self-link" href="#w3c-conventions"></a></h3>
<p>Conformance requirements are expressed
with a combination of descriptive assertions
and RFC 2119 terminology.
The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL”
in the normative parts of this document
are to be interpreted as described in RFC 2119.
However, for readability,
these words do not appear in all uppercase letters in this specification. </p>
<p>All of the text of this specification is normative
except sections explicitly marked as non-normative, examples, and notes. <a data-link-type="biblio" href="#biblio-rfc2119">[RFC2119]</a> </p>
<p>Examples in this specification are introduced with the words “for example”
or are set apart from the normative text
with <code>class="example"</code>,
like this: </p>
<div class="example" id="w3c-example">
<a class="self-link" href="#w3c-example"></a>
<p>This is an example of an informative example. </p>
</div>
<p>Informative notes begin with the word “Note”
and are set apart from the normative text
with <code>class="note"</code>,
like this: </p>
<p class="note" role="note">Note, this is an informative note. </p>
<h3 class="no-ref no-num heading settled" id="w3c-conformant-algorithms"><span class="content">Conformant Algorithms</span><a class="self-link" href="#w3c-conformant-algorithms"></a></h3>
<p>Requirements phrased in the imperative as part of algorithms
(such as "strip any leading space characters"
or "return false and abort these steps")
are to be interpreted with the meaning of the key word
("must", "should", "may", etc)
used in introducing the algorithm. </p>
<p>Conformance requirements phrased as algorithms or specific steps
can be implemented in any manner,
so long as the end result is equivalent.
In particular, the algorithms defined in this specification
are intended to be easy to understand
and are not intended to be performant.
Implementers are encouraged to optimize. </p>
</div>
<script src="https://www.w3.org/scripts/TR/2016/fixup.js"></script>
<h2 class="no-num no-ref heading settled" id="index"><span class="content">Index</span><a class="self-link" href="#index"></a></h2>
<h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="content">Terms defined by this specification</span><a class="self-link" href="#index-defined-here"></a></h3>
<ul class="index">
<li><a href="#dom-datacue-datacue">constructor(startTime, endTime, value)</a><span>, in §3.1</span>
<li><a href="#dom-datacue-datacue">constructor(startTime, endTime, value, type)</a><span>, in §3.1</span>
<li><a href="#datacue">DataCue</a><span>, in §3.1</span>
<li><a href="#dom-datacue-datacue">DataCue(startTime, endTime, value)</a><span>, in §3.1</span>
<li><a href="#dom-datacue-datacue">DataCue(startTime, endTime, value, type)</a><span>, in §3.1</span>
<li><a href="#dom-datacue-type">type</a><span>, in §3.1</span>
<li><a href="#dom-datacue-value">value</a><span>, in §3.1</span>
</ul>
<aside class="dfn-panel" data-for="term-for-texttrackcue">
<a href="https://html.spec.whatwg.org/multipage/media.html#texttrackcue">https://html.spec.whatwg.org/multipage/media.html#texttrackcue</a><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-texttrackcue">3.1. The DataCue interface</a>
</ul>
</aside>
<aside class="dfn-panel" data-for="term-for-idl-DOMString">
<a href="https://heycam.github.io/webidl/#idl-DOMString">https://heycam.github.io/webidl/#idl-DOMString</a><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-idl-DOMString">3.1. The DataCue interface</a> <a href="#ref-for-idl-DOMString①">(2)</a>
</ul>
</aside>
<aside class="dfn-panel" data-for="term-for-Exposed">
<a href="https://heycam.github.io/webidl/#Exposed">https://heycam.github.io/webidl/#Exposed</a><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-Exposed">3.1. The DataCue interface</a>
</ul>
</aside>
<aside class="dfn-panel" data-for="term-for-idl-any">
<a href="https://heycam.github.io/webidl/#idl-any">https://heycam.github.io/webidl/#idl-any</a><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-idl-any">3.1. The DataCue interface</a> <a href="#ref-for-idl-any①">(2)</a>
</ul>
</aside>
<aside class="dfn-panel" data-for="term-for-idl-double">
<a href="https://heycam.github.io/webidl/#idl-double">https://heycam.github.io/webidl/#idl-double</a><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-idl-double">3.1. The DataCue interface</a>
</ul>
</aside>
<aside class="dfn-panel" data-for="term-for-idl-unrestricted-double">
<a href="https://heycam.github.io/webidl/#idl-unrestricted-double">https://heycam.github.io/webidl/#idl-unrestricted-double</a><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-idl-unrestricted-double">3.1. The DataCue interface</a>
</ul>
</aside>
<h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span class="content">Terms defined by reference</span><a class="self-link" href="#index-defined-elsewhere"></a></h3>
<ul class="index">
<li>
<a data-link-type="biblio">[HTML]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="term-for-texttrackcue">TextTrackCue</span>
</ul>
<li>
<a data-link-type="biblio">[WebIDL]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="term-for-idl-DOMString">DOMString</span>
<li><span class="dfn-paneled" id="term-for-Exposed">Exposed</span>
<li><span class="dfn-paneled" id="term-for-idl-any">any</span>
<li><span class="dfn-paneled" id="term-for-idl-double">double</span>
<li><span class="dfn-paneled" id="term-for-idl-unrestricted-double">unrestricted double</span>
</ul>
</ul>
<h2 class="no-num no-ref heading settled" id="references"><span class="content">References</span><a class="self-link" href="#references"></a></h2>
<h3 class="no-num no-ref heading settled" id="normative"><span class="content">Normative References</span><a class="self-link" href="#normative"></a></h3>
<dl>
<dt id="biblio-html">[HTML]
<dd>Anne van Kesteren; et al. <a href="https://html.spec.whatwg.org/multipage/">HTML Standard</a>. Living Standard. URL: <a href="https://html.spec.whatwg.org/multipage/">https://html.spec.whatwg.org/multipage/</a>
<dt id="biblio-mpegcmaf">[MPEGCMAF]
<dd><a href="https://www.iso.org/standard/79106.html">Information technology — Multimedia application format (MPEG-A) — Part 19: Common media application format (CMAF) for segmented media</a>. March 2020. Published. URL: <a href="https://www.iso.org/standard/79106.html">https://www.iso.org/standard/79106.html</a>
<dt id="biblio-mpegdash">[MPEGDASH]
<dd><a href="https://www.iso.org/standard/79329.html">Information technology — Dynamic adaptive streaming over HTTP (DASH) — Part 1: Media presentation description and segment formats</a>. December 2019. Published. URL: <a href="https://www.iso.org/standard/79329.html">https://www.iso.org/standard/79329.html</a>
<dt id="biblio-rfc2119">[RFC2119]
<dd>S. Bradner. <a href="https://tools.ietf.org/html/rfc2119">Key words for use in RFCs to Indicate Requirement Levels</a>. March 1997. Best Current Practice. URL: <a href="https://tools.ietf.org/html/rfc2119">https://tools.ietf.org/html/rfc2119</a>
<dt id="biblio-webidl">[WebIDL]
<dd>Boris Zbarsky. <a href="https://heycam.github.io/webidl/">Web IDL</a>. 15 December 2016. ED. URL: <a href="https://heycam.github.io/webidl/">https://heycam.github.io/webidl/</a>
</dl>
<h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">IDL Index</span><a class="self-link" href="#idl-index"></a></h2>
<pre class="idl highlight def">[<a class="idl-code" data-link-type="extended-attribute" href="https://heycam.github.io/webidl/#Exposed"><c- g>Exposed</c-></a>=<c- n>Window</c->]
<c- b>interface</c-> <a href="#datacue"><code><c- g>DataCue</c-></code></a> : <a data-link-type="idl-name" href="https://html.spec.whatwg.org/multipage/media.html#texttrackcue"><c- n>TextTrackCue</c-></a> {
<a href="#dom-datacue-datacue"><code><c- g>constructor</c-></code></a>(<a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-double"><c- b>double</c-></a> <a href="#dom-datacue-datacue-starttime-endtime-value-type-starttime"><code><c- g>startTime</c-></code></a>, <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-unrestricted-double"><c- b>unrestricted</c-> <c- b>double</c-></a> <a href="#dom-datacue-datacue-starttime-endtime-value-type-endtime"><code><c- g>endTime</c-></code></a>,
<a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-any"><c- b>any</c-></a> <a href="#dom-datacue-datacue-starttime-endtime-value-type-value"><code><c- g>value</c-></code></a>, <c- b>optional</c-> <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-DOMString"><c- b>DOMString</c-></a> <a href="#dom-datacue-datacue-starttime-endtime-value-type-type"><code><c- g>type</c-></code></a>);
<c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-any"><c- b>any</c-></a> <a data-type="any" href="#dom-datacue-value"><code><c- g>value</c-></code></a>;
<c- b>readonly</c-> <c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://heycam.github.io/webidl/#idl-DOMString"><c- b>DOMString</c-></a> <a data-readonly data-type="DOMString" href="#dom-datacue-type"><code><c- g>type</c-></code></a>;
};
</pre>
<aside class="dfn-panel" data-for="datacue">
<b><a href="#datacue">#datacue</a></b><b>Referenced in:</b>
<ul>
<li><a href="#ref-for-datacue">4. In-band event mappings</a>
</ul>
</aside>
<script>/* script-dfn-panel */
document.body.addEventListener("click", function(e) {
var queryAll = function(sel) { return [].slice.call(document.querySelectorAll(sel)); }
// Find the dfn element or panel, if any, that was clicked on.
var el = e.target;
var target;
var hitALink = false;
while(el.parentElement) {
if(el.tagName == "A") {
// Clicking on a link in a <dfn> shouldn't summon the panel
hitALink = true;
}
if(el.classList.contains("dfn-paneled")) {
target = "dfn";
break;
}
if(el.classList.contains("dfn-panel")) {
target = "dfn-panel";
break;
}
el = el.parentElement;
}
if(target != "dfn-panel") {
// Turn off any currently "on" or "activated" panels.
queryAll(".dfn-panel.on, .dfn-panel.activated").forEach(function(el){
el.classList.remove("on");
el.classList.remove("activated");
});
}
if(target == "dfn" && !hitALink) {
// open the panel
var dfnPanel = document.querySelector(".dfn-panel[data-for='" + el.id + "']");
if(dfnPanel) {
dfnPanel.classList.add("on");
var rect = el.getBoundingClientRect();
dfnPanel.style.left = window.scrollX + rect.right + 5 + "px";
dfnPanel.style.top = window.scrollY + rect.top + "px";
var panelRect = dfnPanel.getBoundingClientRect();
var panelWidth = panelRect.right - panelRect.left;
if(panelRect.right > document.body.scrollWidth && (rect.left - (panelWidth + 5)) > 0) {
// Reposition, because the panel is overflowing
dfnPanel.style.left = window.scrollX + rect.left - (panelWidth + 5) + "px";
}
} else {
console.log("Couldn't find .dfn-panel[data-for='" + el.id + "']");
}
} else if(target == "dfn-panel") {
// Switch it to "activated" state, which pins it.
el.classList.add("activated");
el.style.left = null;
el.style.top = null;
}
});
</script>