diff --git a/packages/core/src/code-evaluation/rebuildGeometry.js b/packages/core/src/code-evaluation/rebuildGeometry.js
index ae9bf6e5e..eeb7d8cc3 100644
--- a/packages/core/src/code-evaluation/rebuildGeometry.js
+++ b/packages/core/src/code-evaluation/rebuildGeometry.js
@@ -70,7 +70,7 @@ export const rebuildGeometry = (data, callback) => {
       lookupCounts: solidsData.lookupCounts
     })
   } catch (error) {
-    callback({
+    callback(null, {
       type: 'errors',
       name: error.name ? error.name : 'Error',
       message: error.message ? error.message : error.toString(),
@@ -80,6 +80,6 @@ export const rebuildGeometry = (data, callback) => {
       lineNumber: error.lineNumber ? error.lineNumber : '',
       columnNumber: error.columnNumber ? error.columnNumber : '',
       stack: error.stack ? error.stack : ''
-    }, null)
+    })
   }
 }
diff --git a/packages/examples/core/offsets/offset.js b/packages/examples/core/offsets/offset.js
index e4a41045d..f5f37f4ce 100644
--- a/packages/examples/core/offsets/offset.js
+++ b/packages/examples/core/offsets/offset.js
@@ -69,7 +69,7 @@ const main = () => {
       expandedGeom2Edge,
       expandedGeom2Chamfer,
       expandedGeom2Round,
-      contractedGeom2,
+      contractedGeom2
     ]),
 
     translate([50, 10, 0], [
diff --git a/packages/io/3mf-deserializer/rollup.config.js b/packages/io/3mf-deserializer/rollup.config.js
index 7e8d2b614..7c29ec1c0 100644
--- a/packages/io/3mf-deserializer/rollup.config.js
+++ b/packages/io/3mf-deserializer/rollup.config.js
@@ -24,6 +24,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/3mf-deserializer/src/index.js b/packages/io/3mf-deserializer/src/index.js
index 88e915f0f..71c9abc4a 100644
--- a/packages/io/3mf-deserializer/src/index.js
+++ b/packages/io/3mf-deserializer/src/index.js
@@ -72,8 +72,6 @@ const deserialize = (options, input) => {
   return options.output === 'script' ? translateModels(options, models) : instantiateModels(options, models)
 }
 
-const isBuffer = (obj) => (obj.byteLength !== undefined && typeof obj.slice === 'function')
-
 const mimeType = 'model/3mf'
 
 export {
diff --git a/packages/io/3mf-deserializer/src/model.js b/packages/io/3mf-deserializer/src/model.js
index fb92dc9b3..cc1b19e60 100644
--- a/packages/io/3mf-deserializer/src/model.js
+++ b/packages/io/3mf-deserializer/src/model.js
@@ -16,8 +16,8 @@ export const parseModel = (options, source) => {
   // parse the 3MF contents (XML)
   const { objects, materials, colorgroups, items } = parse(source)
   if (objects.length === 0) {
-     throw new Error('3MF parsing failed, no valid 3MF objects retrieved')
-   }
+    throw new Error('3MF parsing failed, no valid 3MF objects retrieved')
+  }
 
   // get a list of objects to include in the results
   const buildItems = []
diff --git a/packages/io/3mf-deserializer/src/parse.js b/packages/io/3mf-deserializer/src/parse.js
index c9113fe61..26a08dec9 100644
--- a/packages/io/3mf-deserializer/src/parse.js
+++ b/packages/io/3mf-deserializer/src/parse.js
@@ -160,11 +160,10 @@ const getProperty = (object, triangle) => {
 }
 
 const create3mfParser = (src, storage) => {
-  let { items, materials, colorgroups, objects } = storage
+  const { items, materials, colorgroups, objects } = storage
 
   let model = null
   let objLast = null // last object found
-  let objList = []
 
   // create a parser for the XML
   const parser = new saxes.SaxesParser()
@@ -272,10 +271,10 @@ const create3mfParser = (src, storage) => {
 }
 
 export const parse = (src) => {
-  let items = [] // build items list
-  let materials = [] // materials list
-  let colorgroups = [] // colorgroups list
-  let objects = [] // objects list
+  const items = [] // build items list
+  const materials = [] // materials list
+  const colorgroups = [] // colorgroups list
+  const objects = [] // objects list
 
   create3mfParser(src, { items, materials, colorgroups, objects })
   return { items, materials, colorgroups, objects }
diff --git a/packages/io/3mf-serializer/rollup.config.js b/packages/io/3mf-serializer/rollup.config.js
index 4a6a88e02..bff0310ff 100644
--- a/packages/io/3mf-serializer/rollup.config.js
+++ b/packages/io/3mf-serializer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     commonjs(),
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/dxf-deserializer/rollup.config.js b/packages/io/dxf-deserializer/rollup.config.js
index 9d5846366..d747a2643 100644
--- a/packages/io/dxf-deserializer/rollup.config.js
+++ b/packages/io/dxf-deserializer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/dxf-serializer/rollup.config.js b/packages/io/dxf-serializer/rollup.config.js
index 601bc36ee..7e1f456dc 100644
--- a/packages/io/dxf-serializer/rollup.config.js
+++ b/packages/io/dxf-serializer/rollup.config.js
@@ -9,7 +9,7 @@ export default {
     {
       file: 'dist/jscad-dxf-serializer.min.js',
       format: 'umd',
-      name: 'jscadDxfSerializer',
+      name: 'jscadDxfSerializer'
     },
     {
       file: 'dist/jscad-dxf-serializer.es.js',
@@ -20,6 +20,6 @@ export default {
   plugins: [
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/json-deserializer/rollup.config.js b/packages/io/json-deserializer/rollup.config.js
index 765476caf..9ec100235 100644
--- a/packages/io/json-deserializer/rollup.config.js
+++ b/packages/io/json-deserializer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/json-serializer/rollup.config.js b/packages/io/json-serializer/rollup.config.js
index 7435680a9..0a8470c71 100644
--- a/packages/io/json-serializer/rollup.config.js
+++ b/packages/io/json-serializer/rollup.config.js
@@ -20,6 +20,6 @@ export default {
   plugins: [
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/obj-deserializer/rollup.config.js b/packages/io/obj-deserializer/rollup.config.js
index ee20cab8d..ce20c5cc8 100644
--- a/packages/io/obj-deserializer/rollup.config.js
+++ b/packages/io/obj-deserializer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/obj-serializer/rollup.config.js b/packages/io/obj-serializer/rollup.config.js
index 963d8a455..ace30811c 100644
--- a/packages/io/obj-serializer/rollup.config.js
+++ b/packages/io/obj-serializer/rollup.config.js
@@ -20,6 +20,6 @@ export default {
   plugins: [
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/stl-deserializer/rollup.config.js b/packages/io/stl-deserializer/rollup.config.js
index 2a6f64af1..9bff09974 100644
--- a/packages/io/stl-deserializer/rollup.config.js
+++ b/packages/io/stl-deserializer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/stl-deserializer/src/index.js b/packages/io/stl-deserializer/src/index.js
index a253637c2..ab5da12a9 100644
--- a/packages/io/stl-deserializer/src/index.js
+++ b/packages/io/stl-deserializer/src/index.js
@@ -116,7 +116,7 @@ const formatAsJscad = (data, addMetaData, version, filename) => {
   //
   `
   }
-  code += `import * from '@jscad/modeling'\n`
+  code += 'import * from \'@jscad/modeling\'\n'
   code += data.join('\n')
   code += `
 export const main = () => {
diff --git a/packages/io/stl-serializer/rollup.config.js b/packages/io/stl-serializer/rollup.config.js
index f9df04df1..58836f048 100644
--- a/packages/io/stl-serializer/rollup.config.js
+++ b/packages/io/stl-serializer/rollup.config.js
@@ -20,6 +20,6 @@ export default {
   plugins: [
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/svg-deserializer/rollup.config.js b/packages/io/svg-deserializer/rollup.config.js
index 4038ca41b..4256a8588 100644
--- a/packages/io/svg-deserializer/rollup.config.js
+++ b/packages/io/svg-deserializer/rollup.config.js
@@ -24,6 +24,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/svg-deserializer/src/shapesMapGeometry.js b/packages/io/svg-deserializer/src/shapesMapGeometry.js
index 9df721cce..ec884218e 100644
--- a/packages/io/svg-deserializer/src/shapesMapGeometry.js
+++ b/packages/io/svg-deserializer/src/shapesMapGeometry.js
@@ -185,8 +185,9 @@ const expandPath = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, svgGroups
     pc = false
   }
   const ensurePath = () => {
-    if (!paths[pathName]) paths[pathName] = 
-    path2.fromPoints({}, [])
+    if (!paths[pathName]) {
+      paths[pathName] = path2.fromPoints({}, [])
+    }
   }
   for (let j = 0; j < obj.commands.length; j++) {
     const co = obj.commands[j]
@@ -328,8 +329,8 @@ const expandPath = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, svgGroups
           qy = cy + parseFloat(pts[i++])
           cx = cx + parseFloat(pts[i++])
           cy = cy + parseFloat(pts[i++])
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           ensurePath()
           paths[pathName] = path2.appendBezier({
             segments,
@@ -351,8 +352,8 @@ const expandPath = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, svgGroups
           qy = parseFloat(pts[i++])
           cx = parseFloat(pts[i++])
           cy = parseFloat(pts[i++])
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           ensurePath()
           paths[pathName] = path2.appendBezier({
             segments,
@@ -372,8 +373,8 @@ const expandPath = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, svgGroups
           const p0 = [cx, cy] // previous point
           cx = cx + parseFloat(pts[i++])
           cy = cy + parseFloat(pts[i++])
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           ensurePath()
           paths[pathName] = path2.appendBezier({
             segments,
@@ -393,8 +394,8 @@ const expandPath = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, svgGroups
           const p0 = [cx, cy] // previous point
           cx = parseFloat(pts[i++])
           cy = parseFloat(pts[i++])
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           ensurePath()
           paths[pathName] = path2.appendBezier({
             segments,
@@ -419,7 +420,8 @@ const expandPath = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, svgGroups
           cy = cy + parseFloat(pts[i++])
           ensurePath()
           paths[pathName] = path2.appendBezier({
-            segments, controlPoints: [
+            segments,
+            controlPoints: [
               svg2cag([x1, y1], svgUnitsPmm),
               svg2cag([bx, by], svgUnitsPmm),
               svg2cag([cx, cy], svgUnitsPmm)
diff --git a/packages/io/svg-deserializer/src/shapesMapJscad.js b/packages/io/svg-deserializer/src/shapesMapJscad.js
index 5d0402744..7c199ef63 100644
--- a/packages/io/svg-deserializer/src/shapesMapJscad.js
+++ b/packages/io/svg-deserializer/src/shapesMapJscad.js
@@ -258,8 +258,8 @@ const path = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, params, svgGrou
           qy = cy + parseFloat(pts.shift())
           cx = cx + parseFloat(pts.shift()) // end point
           cy = cy + parseFloat(pts.shift())
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           tmpCode += `${indent}${pathName} = path2.appendBezier({segments: ${segments}, controlPoints: [[${svg2cag(q1, svgUnitsPmm)}], [${svg2cag(q2, svgUnitsPmm)}], [${svg2cag([cx, cy], svgUnitsPmm)}]]}, ${pathName})\n`
           const rf = reflect(qx, qy, cx, cy)
           qx = rf[0]
@@ -273,8 +273,8 @@ const path = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, params, svgGrou
           qy = parseFloat(pts.shift())
           cx = parseFloat(pts.shift()) // end point
           cy = parseFloat(pts.shift())
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           tmpCode += `${indent}${pathName} = path2.appendBezier({segments: ${segments}, controlPoints: [[${svg2cag(q1, svgUnitsPmm)}], [${svg2cag(q2, svgUnitsPmm)}], [${svg2cag([cx, cy], svgUnitsPmm)}]]}, ${pathName})\n`
           const rf = reflect(qx, qy, cx, cy)
           qx = rf[0]
@@ -286,8 +286,8 @@ const path = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, params, svgGrou
           const p0 = [cx, cy] // previous point
           cx = cx + parseFloat(pts.shift()) // end point
           cy = cy + parseFloat(pts.shift())
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           tmpCode += `${indent}${pathName} = path2.appendBezier({segments: ${segments}, controlPoints: [[[${svg2cag(q1, svgUnitsPmm)}], [${svg2cag(q2, svgUnitsPmm)}], [${svg2cag([cx, cy], svgUnitsPmm)}]]}, ${pathName})\n`
           const rf = reflect(qx, qy, cx, cy)
           qx = rf[0]
@@ -299,8 +299,8 @@ const path = (obj, svgUnitsPmm, svgUnitsX, svgUnitsY, svgUnitsV, params, svgGrou
           const p0 = [cx, cy] // previous point
           cx = parseFloat(pts.shift()) // end point
           cy = parseFloat(pts.shift())
-          const q1 = [p0[0] + (2/3) * (qx - p0[0]), p0[1] + (2/3) * (qy - p0[1])]
-          const q2 = [q1[0] + (1/3) * (cx - p0[0]), q1[1] + (1/3) * (cy - p0[1])]
+          const q1 = [p0[0] + (2 / 3) * (qx - p0[0]), p0[1] + (2 / 3) * (qy - p0[1])]
+          const q2 = [q1[0] + (1 / 3) * (cx - p0[0]), q1[1] + (1 / 3) * (cy - p0[1])]
           tmpCode += `${indent}${pathName} = path2.appendBezier({segments: ${segments}, controlPoints: [[[${svg2cag(q1, svgUnitsPmm)}], [${svg2cag(q2, svgUnitsPmm)}], [${svg2cag([cx, cy], svgUnitsPmm)}]]}, ${pathName})\n`
           const rf = reflect(qx, qy, cx, cy)
           qx = rf[0]
diff --git a/packages/io/svg-serializer/rollup.config.js b/packages/io/svg-serializer/rollup.config.js
index 1cb44be7a..d8e30ae46 100644
--- a/packages/io/svg-serializer/rollup.config.js
+++ b/packages/io/svg-serializer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/x3d-deserializer/rollup.config.js b/packages/io/x3d-deserializer/rollup.config.js
index 8b615e945..ee0f908b8 100644
--- a/packages/io/x3d-deserializer/rollup.config.js
+++ b/packages/io/x3d-deserializer/rollup.config.js
@@ -24,6 +24,6 @@ export default {
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
     versionInjector({ injectInComments: { fileRegexp: /\.(html)$/ }, logLevel: 'warn' }),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/io/x3d-deserializer/src/objects.js b/packages/io/x3d-deserializer/src/objects.js
index de973b6a7..1c7c13970 100644
--- a/packages/io/x3d-deserializer/src/objects.js
+++ b/packages/io/x3d-deserializer/src/objects.js
@@ -1,4 +1,4 @@
-import { area, poly2 } from '@jscad/modeling'
+import { area } from '@jscad/modeling'
 
 export const x3dTypes = {
   X3D: 0,
diff --git a/packages/io/x3d-serializer/rollup.config.js b/packages/io/x3d-serializer/rollup.config.js
index e798f422b..3322b3329 100644
--- a/packages/io/x3d-serializer/rollup.config.js
+++ b/packages/io/x3d-serializer/rollup.config.js
@@ -20,6 +20,6 @@ export default {
   plugins: [
     nodeResolve(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/modeling/rollup.config.js b/packages/modeling/rollup.config.js
index e1edd5d8d..8d1dea107 100644
--- a/packages/modeling/rollup.config.js
+++ b/packages/modeling/rollup.config.js
@@ -16,6 +16,6 @@ export default {
   ],
   plugins: [
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/modeling/src/geometries/geom3/fromPointsConvex.test.js b/packages/modeling/src/geometries/geom3/fromPointsConvex.test.js
index 546289977..8d5369bfd 100644
--- a/packages/modeling/src/geometries/geom3/fromPointsConvex.test.js
+++ b/packages/modeling/src/geometries/geom3/fromPointsConvex.test.js
@@ -3,26 +3,30 @@ import test from 'ava'
 import { fromPointsConvex, validate } from './index.js'
 
 test('fromPointsConvex (uniquePoints)', (t) => {
-  let out = []
-  for(let x=-9;x<=9;++x)
-    for(let y=-9;y<=9;++y)
-     for(let z=-9;z<=9;++z)
-        if (x*x+y*y+z*z <= 96)
-          out.push([x,y,z])
+  const out = []
+  for (let x = -9; x <= 9; ++x) {
+    for (let y = -9; y <= 9; ++y) {
+      for (let z = -9; z <= 9; ++z) {
+        if (x * x + y * y + z * z <= 96) {
+          out.push([x, y, z])
+        }
+      }
+    }
+  }
 
-  let obs = fromPointsConvex(out)
+  const obs = fromPointsConvex(out)
   validate(obs)
   t.is(obs.polygons.length, 170)
-  t.true(obs.polygons.every((f) => ([3,4,8,9].indexOf(f.vertices.length) !== -1)))
+  t.true(obs.polygons.every((f) => ([3, 4, 8, 9].indexOf(f.vertices.length) !== -1)))
 
-  let c = [0,0,0,0,0,0,0,0,0,0]
+  const c = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
   obs.polygons.forEach((f) => c[f.vertices.length]++)
-  t.is(c[3], 120);
-  t.is(c[4], 24);
-  t.is(c[8], 18);
-  t.is(c[9], 8);
+  t.is(c[3], 120)
+  t.is(c[4], 24)
+  t.is(c[8], 18)
+  t.is(c[9], 8)
 
-  let edges2 = 336*2
-  obs.polygons.forEach((f) => edges2 -= f.vertices.length)
-  t.is(edges2, 0);
+  let edges2 = 336 * 2
+  obs.polygons.forEach((f) => { edges2 -= f.vertices.length })
+  t.is(edges2, 0)
 })
diff --git a/packages/modeling/src/geometries/slice/validate.js b/packages/modeling/src/geometries/slice/validate.js
index dc079691d..5cb1ff29f 100644
--- a/packages/modeling/src/geometries/slice/validate.js
+++ b/packages/modeling/src/geometries/slice/validate.js
@@ -28,10 +28,9 @@ export const validate = (object) => {
     // contours must be coplanar
     const contourPlane = poly3.plane(poly3.create(contour))
     if (!plane.equals(slicePlane, contourPlane)) {
-      throw new Error(`slice contours must be coplanar`)
+      throw new Error('slice contours must be coplanar')
     }
 
-
     for (let i = 0; i < contour.length; i++) {
       const vertex = contour[i]
       // check for infinity, nan
diff --git a/packages/modeling/src/maths/mat4/isOnlyTransformScale.js b/packages/modeling/src/maths/mat4/isOnlyTransformScale.js
index 7f3007bd6..4c9c7c87f 100644
--- a/packages/modeling/src/maths/mat4/isOnlyTransformScale.js
+++ b/packages/modeling/src/maths/mat4/isOnlyTransformScale.js
@@ -18,7 +18,7 @@ export const isOnlyTransformScale = (matrix) => (
 )
 
 /**
- * @param {number} num 
+ * @param {number} num
  * @returns {boolean}
  */
 const isZero = (num) => Math.abs(num) < Number.EPSILON
diff --git a/packages/modeling/src/operations/booleans/intersectGeom2.test.js b/packages/modeling/src/operations/booleans/intersectGeom2.test.js
index f75fadf1e..53563d327 100644
--- a/packages/modeling/src/operations/booleans/intersectGeom2.test.js
+++ b/packages/modeling/src/operations/booleans/intersectGeom2.test.js
@@ -80,8 +80,8 @@ test('intersect with undefined/null values', (t) => {
   const square3 = square({ size: 4 })
   const geometries = [square1, undefined, square2, null, square3]
 
-  let obs = intersect(...geometries)
-  let pts = geom2.toPoints(obs)
+  const obs = intersect(...geometries)
+  const pts = geom2.toPoints(obs)
   t.notThrows(() => geom2.validate(obs))
   t.is(pts.length, 4)
 })
diff --git a/packages/modeling/src/operations/booleans/mayOverlap.js b/packages/modeling/src/operations/booleans/mayOverlap.js
index 64e82fba5..ef06e2c01 100644
--- a/packages/modeling/src/operations/booleans/mayOverlap.js
+++ b/packages/modeling/src/operations/booleans/mayOverlap.js
@@ -2,7 +2,6 @@ import { EPS } from '../../maths/constants.js'
 
 import { measureBoundingBox } from '../../measurements/measureBoundingBox.js'
 
-
 /*
  * Determine if the given geometries overlap by comparing min and max bounds.
  * NOTE: This is used in union for performance gains.
diff --git a/packages/modeling/src/operations/booleans/subtractGeom2.test.js b/packages/modeling/src/operations/booleans/subtractGeom2.test.js
index ab4e1b93c..5dbbc1161 100644
--- a/packages/modeling/src/operations/booleans/subtractGeom2.test.js
+++ b/packages/modeling/src/operations/booleans/subtractGeom2.test.js
@@ -82,8 +82,8 @@ test('subtract with undefined/null values', (t) => {
   const square3 = square({ size: 4 })
   const geometries = [square1, undefined, square2, null, square3]
 
-  let obs = subtract(...geometries)
-  let pts = geom2.toPoints(obs)
+  const obs = subtract(...geometries)
+  const pts = geom2.toPoints(obs)
   t.notThrows(() => geom2.validate(obs))
   t.is(pts.length, 8)
 })
diff --git a/packages/modeling/src/operations/booleans/unionGeom2.test.js b/packages/modeling/src/operations/booleans/unionGeom2.test.js
index e428df539..493d442f7 100644
--- a/packages/modeling/src/operations/booleans/unionGeom2.test.js
+++ b/packages/modeling/src/operations/booleans/unionGeom2.test.js
@@ -216,8 +216,8 @@ test('union with undefined/null values', (t) => {
   const square3 = square({ size: 4 })
   const geometries = [square1, undefined, square2, null, square3]
 
-  let obs = union(...geometries)
-  let pts = geom2.toPoints(obs)
+  const obs = union(...geometries)
+  const pts = geom2.toPoints(obs)
   t.notThrows(() => geom2.validate(obs))
   t.is(pts.length, 4)
 })
diff --git a/packages/modeling/src/operations/hulls/hull.js b/packages/modeling/src/operations/hulls/hull.js
index 380f74c85..0bb6ca76c 100644
--- a/packages/modeling/src/operations/hulls/hull.js
+++ b/packages/modeling/src/operations/hulls/hull.js
@@ -36,7 +36,6 @@ export const hull = (...geometries) => {
   geometries = coalesce(geometries)
 
   if (geometries.length === 0) return undefined
-  if (geometries.length === 1) geometries[0]
 
   if (!areAllShapesTheSameType(geometries)) {
     throw new Error('only hulls of the same type are supported')
diff --git a/packages/modeling/src/operations/offsets/offsetFromPoints.test.js b/packages/modeling/src/operations/offsets/offsetFromPoints.test.js
index 88b364f26..763c2edf4 100644
--- a/packages/modeling/src/operations/offsets/offsetFromPoints.test.js
+++ b/packages/modeling/src/operations/offsets/offsetFromPoints.test.js
@@ -200,7 +200,6 @@ test('offset (corners: edge): offset of a path2 produces expected offset path2',
 
 test('offset (corners: round): offset of a path2 produces expected offset path2', (t) => {
   const openline = [[-5, -5], [5, -5], [5, 5], [3, 5], [3, 0], [-3, 0], [-3, 5], [-5, 5]]
-  const closeline = [[-5, -5], [5, -5], [5, 5], [3, 5], [3, 0], [-3, 0], [-3, 5], [-5, 5], [-5, -5]]
 
   let pts = offsetFromPoints({ delta: 1, corners: 'round', segments: 16 }, openline)
   let obs = path2.create(pts)
diff --git a/packages/modeling/src/operations/offsets/offsetGeom3.js b/packages/modeling/src/operations/offsets/offsetGeom3.js
index 9c9a44115..11a404b7a 100644
--- a/packages/modeling/src/operations/offsets/offsetGeom3.js
+++ b/packages/modeling/src/operations/offsets/offsetGeom3.js
@@ -1,5 +1,3 @@
-import * as geom3 from '../../geometries/geom3/index.js'
-
 import { union } from '../booleans/union.js'
 
 import { offsetShell } from './offsetShell.js'
diff --git a/packages/modeling/src/operations/offsets/offsetPath2.js b/packages/modeling/src/operations/offsets/offsetPath2.js
index 1e51e6027..55e07a6e7 100644
--- a/packages/modeling/src/operations/offsets/offsetPath2.js
+++ b/packages/modeling/src/operations/offsets/offsetPath2.js
@@ -85,9 +85,9 @@ export const offsetPath2 = (options, geometry) => {
     internal: offsetFromPoints({ delta: -delta, corners, segments, closed }, points)
   }
 
-  const output = geometry.isClosed ?
-    createGeometryFromClosedPath(paths) :
-    createGeometryFromOpenPath(paths, segments, corners, delta)
+  const output = geometry.isClosed
+    ? createGeometryFromClosedPath(paths)
+    : createGeometryFromOpenPath(paths, segments, corners, delta)
   if (geometry.color) output.color = geometry.color
   return output
 }
diff --git a/packages/modeling/src/operations/transforms/center.test.js b/packages/modeling/src/operations/transforms/center.test.js
index c97607705..358b7b8d5 100644
--- a/packages/modeling/src/operations/transforms/center.test.js
+++ b/packages/modeling/src/operations/transforms/center.test.js
@@ -4,7 +4,7 @@ import { comparePoints, comparePolygonsAsPoints } from '../../../test/helpers/in
 
 import { geom2, geom3, path2 } from '../../geometries/index.js'
 
-import { measureArea, measureAggregateBoundingBox, measureCenter, measureVolume } from '../../measurements/index.js'
+import { measureArea, measureAggregateBoundingBox, measureVolume } from '../../measurements/index.js'
 
 import { square } from '../../primitives/index.js'
 
diff --git a/packages/modeling/src/primitives/polygon.js b/packages/modeling/src/primitives/polygon.js
index c8cbf73c0..646894a8c 100644
--- a/packages/modeling/src/primitives/polygon.js
+++ b/packages/modeling/src/primitives/polygon.js
@@ -69,7 +69,7 @@ export const polygon = (options) => {
   })
 
   let geometry = geom2.create(outlines)
-  if (orientation == "clockwise") {
+  if (orientation === 'clockwise') {
     geometry = geom2.reverse(geometry)
   }
   return geometry
diff --git a/packages/modeling/src/primitives/polygon.test.js b/packages/modeling/src/primitives/polygon.test.js
index 1d4e176be..582024c19 100644
--- a/packages/modeling/src/primitives/polygon.test.js
+++ b/packages/modeling/src/primitives/polygon.test.js
@@ -62,7 +62,7 @@ test('polygon: providing object.points (array) and object.path (array) creates e
 test('polygon: clockwise points', (t) => {
   const poly = polygon({
     points: [[-10, -0], [-10, -10], [-15, -5]],
-    orientation: "clockwise",
+    orientation: 'clockwise'
   })
   t.is(measureArea(poly), 25)
 })
diff --git a/packages/utils/array-utils/rollup.config.js b/packages/utils/array-utils/rollup.config.js
index afc8647d0..8a660fff6 100644
--- a/packages/utils/array-utils/rollup.config.js
+++ b/packages/utils/array-utils/rollup.config.js
@@ -16,6 +16,6 @@ export default {
   ],
   plugins: [
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }
diff --git a/packages/utils/regl-renderer/rollup.config.js b/packages/utils/regl-renderer/rollup.config.js
index 89e195d42..65b8539af 100644
--- a/packages/utils/regl-renderer/rollup.config.js
+++ b/packages/utils/regl-renderer/rollup.config.js
@@ -22,6 +22,6 @@ export default {
     nodeResolve(),
     commonjs(),
     banner('<%= pkg.description %>\n@module <%= pkg.name %>\n@version <%= pkg.version %>\n@license <%= pkg.license %>'),
-    terser({ compress: { module: true }, mangle: false, format: { comments: 'some'} })
+    terser({ compress: { module: true }, mangle: false, format: { comments: 'some' } })
   ]
 }