Add vue/no-irregular-whitespace rule (#964)

docs/rules/README.md

@@ -159,6 +159,7 @@ For example:
 | [vue/no-deprecated-slot-attribute](./no-deprecated-slot-attribute.md) | disallow deprecated `slot` attribute (in Vue.js 2.6.0+) | :wrench: |
 | [vue/no-deprecated-slot-scope-attribute](./no-deprecated-slot-scope-attribute.md) | disallow deprecated `slot-scope` attribute (in Vue.js 2.6.0+) | :wrench: |
 | [vue/no-empty-pattern](./no-empty-pattern.md) | disallow empty destructuring patterns |  |
+| [vue/no-irregular-whitespace](./no-irregular-whitespace.md) | disallow irregular whitespace |  |
 | [vue/no-reserved-component-names](./no-reserved-component-names.md) | disallow the use of reserved names in component definitions |  |
 | [vue/no-restricted-syntax](./no-restricted-syntax.md) | disallow specified syntax |  |
 | [vue/no-static-inline-styles](./no-static-inline-styles.md) | disallow static inline `style` attributes |  |

docs/rules/no-irregular-whitespace.md

@@ -0,0 +1,167 @@
+---
+pageClass: rule-details
+sidebarDepth: 0
+title: vue/no-irregular-whitespace
+description: disallow irregular whitespace
+---
+# vue/no-irregular-whitespace
+> disallow irregular whitespace
+
+`vue/no-irregular-whitespace` rule is aimed at catching invalid whitespace that is not a normal tab and space. Some of these characters may cause issues in modern browsers and others will be a debugging issue to spot.
+`vue/no-irregular-whitespace` rule is the similar rule as core [no-irregular-whitespace] rule but it applies to the source code in .vue.
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error']}">
+
+```vue
+<template>
+  <!-- ✓ GOOD -->
+  <div class="foo bar" />
+  <!-- ✗ BAD -->
+  <div class="foobar" />
+  <!--           ^ LINE TABULATION (U+000B) -->
+</template>
+<script>
+/* ✓ GOOD */
+var foo = bar;
+/* ✗ BAD */
+var foo =bar;
+//       ^ LINE TABULATION (U+000B)
+</script>
+```
+
+</eslint-code-block>
+
+## :wrench: Options
+
+```js
+{
+    "vue/no-irregular-whitespace": ["error", {
+        "skipStrings": true,
+        "skipComments": false,
+        "skipRegExps": false,
+        "skipTemplates": false,
+        "skipHTMLAttributeValues": false,
+        "skipHTMLTextContents": false
+    }]
+}
+```
+
+- `skipStrings`: if `true`, allows any whitespace characters in string literals. default `true`
+- `skipComments`: if `true`, allows any whitespace characters in comments. default `false`
+- `skipRegExps`: if `true`, allows any whitespace characters in regular expression literals. default `false`
+- `skipTemplates`: if `true`, allows any whitespace characters in template literals. default `false`
+- `skipHTMLAttributeValues`: if `true`, allows any whitespace characters in HTML attribute values. default `false`
+- `skipHTMLTextContents`: if `true`, allows any whitespace characters in HTML text contents. default `false`
+
+### `"skipStrings": true` (default)
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipStrings: true}]}">
+
+```vue
+<script>
+/* ✓ GOOD */
+var foo = ''
+//         ^ LINE TABULATION (U+000B)
+</script>
+```
+
+</eslint-code-block>
+
+### `"skipStrings": false`
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipStrings: false}]}">
+
+```vue
+<script>
+/* ✗ BAD */
+var foo = ''
+//         ^ LINE TABULATION (U+000B)
+</script>
+```
+
+</eslint-code-block>
+
+### `"skipComments": true`
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipComments: true}]}">
+
+```vue
+<template>
+  <!-- ✓ GOOD -->
+  <!-- []< LINE TABULATION (U+000B) -->
+</template>
+<script>
+/* ✓ GOOD */
+// []< LINE TABULATION (U+000B)
+/* []< LINE TABULATION (U+000B) */
+</script>
+```
+
+</eslint-code-block>
+
+### `"skipRegExps": true`
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipRegExps: true}]}">
+
+```vue
+<script>
+/* ✓ GOOD */
+var foo = //
+//         ^ LINE TABULATION (U+000B)
+</script>
+```
+
+</eslint-code-block>
+
+### `"skipTemplates": true`
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipTemplates: true}]}">
+
+```vue
+<script>
+/* ✓ GOOD */
+var foo = ``
+//         ^ LINE TABULATION (U+000B)
+</script>
+```
+
+</eslint-code-block>
+
+### `"skipHTMLAttributeValues": true`
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipHTMLAttributeValues: true}]}">
+
+```vue
+<template>
+  <!-- ✓ GOOD -->
+  <div class="foobar" />
+  <!--           ^ LINE TABULATION (U+000B) -->
+</template>
+```
+
+</eslint-code-block>
+
+### `"skipHTMLTextContents": true`
+
+<eslint-code-block :rules="{'vue/no-irregular-whitespace': ['error', {skipHTMLTextContents: true}]}">
+
+```vue
+<template>
+  <!-- ✓ GOOD -->
+  <div></div>
+  <!-- ^ LINE TABULATION (U+000B) -->
+</template>
+```
+
+</eslint-code-block>
+
+## :books: Further reading
+
+- [no-irregular-whitespace]
+
+[no-irregular-whitespace]: https://eslint.org/docs/rules/no-irregular-whitespace
+
+## :mag: Implementation
+
+- [Rule source](https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/no-irregular-whitespace.js)
+- [Test source](https://github.com/vuejs/eslint-plugin-vue/blob/master/tests/lib/rules/no-irregular-whitespace.js)

lib/index.js

@@ -45,6 +45,7 @@ module.exports = {
     'no-dupe-keys': require('./rules/no-dupe-keys'),
     'no-duplicate-attributes': require('./rules/no-duplicate-attributes'),
     'no-empty-pattern': require('./rules/no-empty-pattern'),
+    'no-irregular-whitespace': require('./rules/no-irregular-whitespace'),
     'no-multi-spaces': require('./rules/no-multi-spaces'),
     'no-parsing-error': require('./rules/no-parsing-error'),
     'no-reserved-component-names': require('./rules/no-reserved-component-names'),