-
Notifications
You must be signed in to change notification settings - Fork 0
/
15563238799174.html
394 lines (256 loc) · 10.3 KB
/
15563238799174.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
<!doctype html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>
preventDefault 妙用，控制文本框输入 - The Shf
</title>
<link href="atom.xml" rel="alternate" title="The Shf" type="application/atom+xml">
<link rel="stylesheet" href="asset/css/foundation.min.css" />
<link rel="stylesheet" href="asset/css/docs.css" />
<script src="asset/js/vendor/modernizr.js"></script>
<script src="asset/js/vendor/jquery.js"></script>
<script src="asset/highlightjs/highlight.pack.js"></script>
<link href="asset/highlightjs/styles/github.css" media="screen, projection" rel="stylesheet" type="text/css">
<script>hljs.initHighlightingOnLoad();</script>
<script type="text/javascript">
function before_search(){
var searchVal = 'site:sunbest.top ' + document.getElementById('search_input').value;
document.getElementById('search_q').value = searchVal;
return true;
}
</script>
</head>
<body class="antialiased hide-extras">
<div class="marketing off-canvas-wrap" data-offcanvas>
<div class="inner-wrap">
<nav class="top-bar docs-bar hide-for-small" data-topbar>
<section class="top-bar-section">
<div class="row">
<div style="position: relative;width:100%;"><div style="position: absolute; width:100%;">
<ul id="main-menu" class="left">
<li id="removeNode"><a target="_self" href="index.html">Home</a></li>
<li id=""><a target="_self" href="archives.html">Archives</a></li>
<li id=""><a target="_self" href="test.html">test</a></li>
</ul>
<ul class="right" id="search-wrap">
<li>
<form target="_blank" onsubmit="return before_search();" action="https://google.com/search" method="get">
<input type="hidden" id="search_q" name="q" value="" />
<input tabindex="1" type="search" id="search_input" placeholder="Search"/>
</form>
</li>
</ul>
</div></div>
</div>
</section>
</nav>
<nav class="tab-bar show-for-small">
<a href="javascript:void(0)" class="left-off-canvas-toggle menu-icon">
<span> The Shf</span>
</a>
</nav>
<aside class="left-off-canvas-menu">
<ul class="off-canvas-list">
<li><a target="_self" href="index.html">Home</a></li>
<li><a target="_self" href="archives.html">Archives</a></li>
<li><a target="_self" href="test.html">test</a></li>
<li><label>Categories</label></li>
<li><a href="%E4%B8%9A%E5%8A%A1%E5%9C%BA%E6%99%AF%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88.html">业务场景解决方案</a></li>
<li><a href="mac.html">mac</a></li>
<li><a href="%E8%A7%81%E8%AF%86.html">见识</a></li>
<li><a href="share.html">share</a></li>
</ul>
</aside>
<a class="exit-off-canvas" href="#"></a>
<section id="main-content" role="main" class="scroll-container">
<script type="text/javascript">
$(function(){
$('#menu_item_index').addClass('is_active');
});
</script>
<div class="row">
<div class="large-8 medium-8 columns">
<div class="markdown-body article-wrap">
<div class="article">
<h1>preventDefault 妙用，控制文本框输入</h1>
<div class="read-more clearfix">
<span class="date">2018/4/26</span>
<span>posted in </span>
<span class="posted-in"><a href='%E4%B8%9A%E5%8A%A1%E5%9C%BA%E6%99%AF%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88.html'>业务场景解决方案</a></span>
<span class="comments">
</span>
</div>
</div><!-- article -->
<div class="article-content">
<p>下面以 文本框只能输入数字为例：</p>
<pre><code class="language-javascript"><!--html-->
<input id="input" />
let input = document.querySelector('#input')
input.addEventListener('keypress', function(e){
if(e.charCode < 48 || e.charCode > 57){
e.preventDefault()
}
})
</code></pre>
<p>🍭 可以开始了吗， <br/>
🍬 已经 完美结束啦<br/>
🍭 让我试试～<br/>
🍭 <img src="media/15563238799174/ScreenFlow.gif" alt="ScreenFlo"/><br/>
🍬 等等，不许你用中文输入法😂😂😂<br/>
🍬 那咱们正式开始吧</p>
<p>🚗🚗🚗 滴滴 看样子 只能寻求 <code>keyboardEvent</code> 家族来帮我们解决问题了</p>
<span id="more"></span><!-- more -->
<pre><code class="language-javascript">let eventName = keyboardEvent.filter(event => 解决中文输入法问题(event))
console.log(eventName) // [] 🤭🤭🤭
</code></pre>
<p>我还没有放弃， 因为我想到了 工作中的 好伙伴 <code>element-ui</code>，也许它能给我些灵感</p>
<p>迅速找到了两个可能相关的组件</p>
<ul>
<li>input 输入框</li>
<li>inputNumber 计数器</li>
</ul>
<p>然而：<br/>
🤦♀️ input 输入框 类型属性 <code>type</code> 支持的是原生input type值<br/>
🤦♀️ inputNumber 只是 失去焦点 时 校验输入的值</p>
<p>此时 一股第三方力量 强行介入<br/>
🤖 你不会可以问我啊，谷歌一下，全都明白<br/>
🍬有道理<br/>
🍬啪啪啪。。。enter<br/>
🍬☺️知道答案啦 ，你怎么什么都会呀😍</p>
<p>让我们 修改下上面的代码</p>
<pre><code class="language-javascript"><!--html-->
<input id="input" />
let input = document.querySelector('#input')
input.addEventListener('keypress', function(e){
if(e.charCode < 48 || e.charCode > 57){
e.preventDefault()
}
})
input.addEventListener('input', function(e){
e.target.value = e.target.value.replace(/[^0-9\.]/g, '')
})
</code></pre>
<p>测试：</p>
<ul>
<li>谷歌 KO</li>
<li>火狐 KO</li>
<li>IE11 KO</li>
<li>IE10 KO</li>
<li>IE9 KO</li>
<li>。。。</li>
</ul>
<p>🍬 快看 你可以这么用了<br/>
🍭 🤨 还需要 监听 <code>keypress</code>事件吗<br/>
🍬 。。。</p>
<pre><code class="language-javascript"><!--html-->
<input id="input" />
let input = document.querySelector('#input')
input.addEventListener('input', function(e){
e.target.value = e.target.value.replace(/[^0-9\.]/g, '')
})
</code></pre>
<p>🍭 😃<br/>
🍬 我标题要改吗<br/>
🍭 你究竟是 跑题了 还是 从入门到放弃<br/>
🍬 🤦♀️🤦♀️🤦♀️</p>
</div>
<div class="row">
<div class="large-6 columns">
<p class="text-left" style="padding:15px 0px;">
<a href="15559869234785.html"
title="Previous Post: RESTful">« RESTful</a>
</p>
</div>
<div class="large-6 columns">
<p class="text-right" style="padding:15px 0px;">
<a href="15578343978528.html"
title="Next Post: 几个占位图片生成网站">几个占位图片生成网站 »</a>
</p>
</div>
</div>
<div class="comments-wrap">
<div class="share-comments">
</div>
</div>
</div><!-- article-wrap -->
</div><!-- large 8 -->
<div class="large-4 medium-4 columns">
<div class="hide-for-small">
<div id="sidebar" class="sidebar">
<div id="site-info" class="site-info">
<h1>The Shf</h1>
<div class="site-des">贤者以其昭昭使人昭昭</div>
<div class="social">
<a target="_blank" class="email" href="mailto:[email protected]" title="Email">Email</a>
<a target="_blank" class="rss" href="atom.xml" title="RSS">RSS</a>
</div>
</div>
<div id="site-categories" class="side-item ">
<div class="side-header">
<h2>Categories</h2>
</div>
<div class="side-content">
<p class="cat-list">
<a href="%E4%B8%9A%E5%8A%A1%E5%9C%BA%E6%99%AF%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88.html"><strong>业务场景解决方案</strong></a>
<a href="mac.html"><strong>mac</strong></a>
<a href="%E8%A7%81%E8%AF%86.html"><strong>见识</strong></a>
<a href="share.html"><strong>share</strong></a>
</p>
</div>
</div>
<div id="site-categories" class="side-item">
<div class="side-header">
<h2>Recent Posts</h2>
</div>
<div class="side-content">
<ul class="posts-list">
<li class="post">
<a href="15572339910216.html">mac 使用技巧</a>
</li>
<li class="post">
<a href="15578321968662.html">mac os 系统目录结构</a>
</li>
<li class="post">
<a href="15559869234785.html">RESTful</a>
</li>
<li class="post">
<a href="15563238799174.html">preventDefault 妙用，控制文本框输入</a>
</li>
<li class="post">
<a href="15578343978528.html">几个占位图片生成网站</a>
</li>
</ul>
</div>
</div>
</div><!-- sidebar -->
</div><!-- hide for small -->
</div><!-- large 4 -->
</div><!-- row -->
<div class="page-bottom clearfix">
<div class="row">
<p class="copyright">Copyright © 2015
Powered by <a target="_blank" href="https://sunbest.top">THE SHF</a>
</div>
</div>
</section>
</div>
</div>
<script src="asset/js/foundation.min.js"></script>
<script>
$(document).foundation();
function fixSidebarHeight(){
var w1 = $('.markdown-body').height();
var w2 = $('#sidebar').height();
if (w1 > w2) { $('#sidebar').height(w1); };
}
$(function(){
fixSidebarHeight();
})
$(window).load(function(){
fixSidebarHeight();
});
</script>
</body>
</html>