Merge branch 'master' into 47-props-per-line

* master:
  Add rule `vue/require-valid-default-prop`. (vuejs#119)
  3.10.0
  Update readme to 3.10.0
  Chore: remove package-lock.json (vuejs#128)
  Fix: parserService must exist always (fixes vuejs#125) (vuejs#127)
  Add rule `require-render-return`. (vuejs#114)
  3.9.0
  Update package-lock
  Update: options for `no-duplicate-attributes` (fixes vuejs#112)(vuejs#113)
  New: add rule `attribute-hyphenation`. (fixes vuejs#92)(vuejs#95)
  Add namespace check of svg & mathML instead of tag names (vuejs#120)
  ⚠️ Add support for deprecated state in update-rules ⚠️ (vuejs#121)
  Add rules: `no-dupe-keys` and `no-reserved-keys`. (vuejs#88)
  Chore: Improve tests for name-property-casing & improve documentation (vuejs#115)
  New: add `require-prop-types` rule (fixes vuejs#19)(vuejs#85)
  Update: upgrade vue-eslint-parser (fixes vuejs#36, fixes vuejs#56, fixes vuejs#96) (vuejs#116)

.eslintignore

@@ -1,2 +1,4 @@
 node_modules
 lib/recommended-rules.js
+coverage
+.nyc_output

.npmrc

@@ -0,0 +1 @@
+package-lock=false

README.md

@@ -58,34 +58,38 @@ No rules are enabled by `plugin:vue/base` config. The `plugin:vue/recommended` c
 
 The `--fix` option on the command line automatically fixes problems reported by rules which have a wrench :wrench: below.
 
+Deprecated rules witch should be used with caution and only enabled when you know what you are doing have a warning :warning: icon.
+
 <!--RULES_TABLE_START-->
 
+### Stylistic Issues
+
+|    | Rule ID | Description |
+|:---|:--------|:------------|
+| :wrench: | [attribute-hyphenation](./docs/rules/attribute-hyphenation.md) | Define a style for the props casing in templates. |
+|  | [html-quotes](./docs/rules/html-quotes.md) | enforce quotes style of HTML attributes. |
+| :wrench: | [name-property-casing](./docs/rules/name-property-casing.md) | Requires specific casing for the name property in Vue components |
+| :wrench: | [v-bind-style](./docs/rules/v-bind-style.md) | enforce `v-bind` directive style. |
+| :wrench: | [v-on-style](./docs/rules/v-on-style.md) | enforce `v-on` directive style. |
+
+
 ### Best Practices
 
 |    | Rule ID | Description |
 |:---|:--------|:------------|
 | :wrench: | [html-end-tags](./docs/rules/html-end-tags.md) | enforce end tag style. |
-| :wrench: | [html-no-self-closing](./docs/rules/html-no-self-closing.md) | disallow self-closing elements. |
+| :wrench::warning: | [html-no-self-closing](./docs/rules/html-no-self-closing.md) | disallow self-closing elements. - (deprecated) |
 |  | [no-async-in-computed-properties](./docs/rules/no-async-in-computed-properties.md) | Check if there are no asynchronous actions inside computed properties. |
 | :white_check_mark: | [no-confusing-v-for-v-if](./docs/rules/no-confusing-v-for-v-if.md) | disallow confusing `v-for` and `v-if` on the same element. |
 |  | [no-duplicate-attributes](./docs/rules/no-duplicate-attributes.md) | disallow duplicate attributes. |
 |  | [no-side-effects-in-computed-properties](./docs/rules/no-side-effects-in-computed-properties.md) | Don't introduce side effects in computed properties |
 | :white_check_mark: | [no-textarea-mustache](./docs/rules/no-textarea-mustache.md) | disallow mustaches in `<textarea>`. |
 |  | [order-in-components](./docs/rules/order-in-components.md) | Keep order of properties in components |
 | :white_check_mark: | [require-component-is](./docs/rules/require-component-is.md) | require `v-bind:is` of `<component>` elements. |
+|  | [require-prop-types](./docs/rules/require-prop-types.md) | Prop definitions should be detailed |
 | :white_check_mark: | [require-v-for-key](./docs/rules/require-v-for-key.md) | require `v-bind:key` with `v-for` directives. |
 
 
-### Stylistic Issues
-
-|    | Rule ID | Description |
-|:---|:--------|:------------|
-|  | [html-quotes](./docs/rules/html-quotes.md) | enforce quotes style of HTML attributes. |
-| :wrench: | [name-property-casing](./docs/rules/name-property-casing.md) | Requires specific casing for the name property in Vue components |
-| :wrench: | [v-bind-style](./docs/rules/v-bind-style.md) | enforce `v-bind` directive style. |
-| :wrench: | [v-on-style](./docs/rules/v-on-style.md) | enforce `v-on` directive style. |
-
-
 ### Variables
 
 |    | Rule ID | Description |
@@ -97,6 +101,7 @@ The `--fix` option on the command line automatically fixes problems reported by
 
 |    | Rule ID | Description |
 |:---|:--------|:------------|
+|  | [no-dupe-keys](./docs/rules/no-dupe-keys.md) | Prevents duplication of field names. |
 | :white_check_mark: | [no-invalid-template-root](./docs/rules/no-invalid-template-root.md) | disallow invalid template root. |
 | :white_check_mark: | [no-invalid-v-bind](./docs/rules/no-invalid-v-bind.md) | disallow invalid `v-bind` directives. |
 | :white_check_mark: | [no-invalid-v-cloak](./docs/rules/no-invalid-v-cloak.md) | disallow invalid `v-cloak` directives. |
@@ -112,8 +117,10 @@ The `--fix` option on the command line automatically fixes problems reported by
 | :white_check_mark: | [no-invalid-v-show](./docs/rules/no-invalid-v-show.md) | disallow invalid `v-show` directives. |
 | :white_check_mark: | [no-invalid-v-text](./docs/rules/no-invalid-v-text.md) | disallow invalid `v-text` directives. |
 | :white_check_mark: | [no-parsing-error](./docs/rules/no-parsing-error.md) | disallow parsing errors in `<template>`. |
+|  | [no-reservered-keys](./docs/rules/no-reservered-keys.md) | Prevent overwrite reserved keys. |
 |  | [no-shared-component-data](./docs/rules/no-shared-component-data.md) | Enforces component's data property to be a function. |
 |  | [no-template-key](./docs/rules/no-template-key.md) | disallow `key` attribute on `<template>`. |
+|  | [require-render-return](./docs/rules/require-render-return.md) | Enforces render function to always return value. |
 |  | [return-in-computed-property](./docs/rules/return-in-computed-property.md) | Enforces that a return statement is present in computed property. |
 
 <!--RULES_TABLE_END-->

docs/rules/attribute-hyphenation.md

@@ -0,0 +1,53 @@
+# Define if attributes on cusom components can be hyphened. (attribute-hyphenation)
+
+## :wrench: Options
+
+Default casing is set to `always`
+
+```
+'vue/attribute-hyphenation': [2, 'always'|'never']
+```
+
+### `"always"` - Use hyphenated name. (It errors on upper case letters.)
+
+:+1: Examples of **correct** code`:
+
+```html
+<template>
+  <foo my-prop="prop">
+    <a onClick="return false"></a>
+  </foo>
+</template>
+```
+
+:-1: Examples of **incorrect** code`:
+
+```html
+<template>
+  <foo myProp="prop">
+    <a onClick="return false"></a>
+  </foo>
+</template>
+```
+
+### `"never"` - Don't use hyphenated name. (It errors on hyphens except `data-` and `aria-`.)
+
+:+1: Examples of **correct** code`:
+
+```html
+<template>
+  <foo myProp="prop">
+    <a onClick="return false"></a>
+  </foo>
+</template>
+```
+
+:-1: Examples of **incorrect** code`:
+
+```html
+<template>
+  <foo my-prop="prop">
+    <a onClick="return false"></a>
+  </foo>
+</template>
+```

docs/rules/no-dupe-keys.md

@@ -0,0 +1,78 @@
+# Prevents duplication of field names (no-dupe-keys)
+
+This rule prevents to use duplicated names.
+
+## :book: Rule Details
+
+This rule is aimed at preventing duplicated property names.
+
+:-1: Examples of **incorrect** code for this rule:
+
+```js
+export default {
+  props: {
+    foo: String
+  },
+  computed: {
+    foo: {
+      get () {
+      }
+    }
+  },
+  data: {
+    foo: null
+  },
+  methods: {
+    foo () {
+    }
+  }
+}
+```
+
+:+1: Examples of **correct** code for this rule:
+
+```js
+export default {
+  props: ['foo'],
+  computed: {
+    bar () {
+    }
+  },
+  data () {
+    return {
+      dat: null
+    }
+  },
+  methods: {
+    test () {
+    }
+  }
+}
+```
+
+## :wrench: Options
+
+This rule has an object option:
+
+`"groups"`: [] (default) array of additional groups to search for duplicates.
+
+### Example:
+
+```
+vue/no-dupe-keys: [2, {
+  groups: ['asyncComputed']
+}]
+```
+
+:-1: Examples of **incorrect** code for this configuration
+
+```js
+export default {
+  computed: {
+    foo () {}
+  },
+  asyncComputed: {
+    foo () {}
+  }
+}
+```

docs/rules/no-duplicate-attributes.md

@@ -27,9 +27,20 @@ This rule reports duplicate attributes.
 
 ## :wrench: Options
 
-Nothing.
+`allowCoexistClass` - Enables [`v-bind:class`] directive can coexist with the plain `class` attribute.
+`allowCoexistStyle` - Enables [`v-bind:style`] directive can coexist with the plain `style` attribute.
+
+```
+'vue/name-property-casing': [2, {
+  allowCoexistClass: Boolean // default: true
+  allowCoexistStyle: Boolean, // default: true
+}]
+```
 
 ## TODO: `<div foo foo></div>`
 
 `parse5` remove duplicate attributes on the tokenization phase.
 Needs investigation to check.
+
+[`v-bind:class`]: https://vuejs.org/v2/guide/class-and-style.html
+[`v-bind:style`]: https://vuejs.org/v2/guide/class-and-style.html

docs/rules/no-parsing-error.md

@@ -1,6 +1,14 @@
 # Disallow parsing errors in `<template>` (no-parsing-error)
 
-This rule reports syntax errors in directives/mustaches of `<template>`.
+This rule reports syntax errors in `<template>`. For example:
+
+- Syntax errors of scripts in directives.
+- Syntax errors of scripts in mustaches.
+- Syntax errors of HTML.
+    - Invalid end tags.
+    - Attributes in end tags.
+    - ...
+    - See also: https://html.spec.whatwg.org/multipage/parsing.html#parse-errors
 
 ## :book: Rule Details
 
@@ -25,4 +33,56 @@ Then reports syntax errors if exist.
 
 ## :wrench: Options
 
-Nothing.
+```json
+{
+    "vue/no-parsing-error": ["error", {
+        "abrupt-closing-of-empty-comment": false,
+        "absence-of-digits-in-numeric-character-reference": false,
+        "cdata-in-html-content": false,
+        "character-reference-outside-unicode-range": false,
+        "control-character-in-input-stream": false,
+        "control-character-reference": false,
+        "eof-before-tag-name": false,
+        "eof-in-cdata": false,
+        "eof-in-comment": false,
+        "eof-in-tag": false,
+        "incorrectly-closed-comment": false,
+        "incorrectly-opened-comment": false,
+        "invalid-first-character-of-tag-name": false,
+        "missing-attribute-value": false,
+        "missing-end-tag-name": false,
+        "missing-semicolon-after-character-reference": false,
+        "missing-whitespace-between-attributes": false,
+        "nested-comment": false,
+        "noncharacter-character-reference": false,
+        "noncharacter-in-input-stream": false,
+        "null-character-reference": false,
+        "surrogate-character-reference": false,
+        "surrogate-in-input-stream": false,
+        "unexpected-character-in-attribute-name": false,
+        "unexpected-character-in-unquoted-attribute-value": false,
+        "unexpected-equals-sign-before-attribute-name": false,
+        "unexpected-null-character": false,
+        "unexpected-question-mark-instead-of-tag-name": false,
+        "unexpected-solidus-in-tag": false,
+        "unknown-named-character-reference": false,
+        "end-tag-with-attributes": false,
+        "duplicate-attribute": false,
+        "end-tag-with-trailing-solidus": false,
+        "non-void-html-element-start-tag-with-trailing-solidus": false,
+        "x-invalid-end-tag": false,
+        "x-invalid-namespace": false
+    }]
+}
+```
+
+You can enable HTML syntax errors by opt-in.
+
+For example, if `"x-invalid-end-tag": true` is given then this rule will catch the end tags of elements which have not opened.
+The error codes are defined in [WHATWG spec](https://html.spec.whatwg.org/multipage/parsing.html#parse-errors), but this rule does not support all of those (E.g., it does not catch errors about DOCTYPE).
+Also, The codes which have `x-` prefix are original in this rule because errors in tree construction phase have not codified yet.
+
+- `x-invalid-end-tag` enables the errors about the end tags of elements which have not opened.
+- `x-invalid-namespace` enables the errors about invalid `xmlns` attributes. See also [step 10. of "create an element for a token"](https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token).
+
+> TODO(mysticatea): I will revisit errors in tree construction phase after those are codified.

docs/rules/no-reservered-keys.md

@@ -0,0 +1,54 @@
+# Prevent overwrite reserved keys (no-reservered-keys)
+
+This rule prevents to use reserved names from to avoid conflicts and unexpected behavior.
+
+## Rule Details
+
+:-1: Examples of **incorrect** code for this rule:
+
+```js
+export default {
+  props: {
+    $el: String
+  },
+  computed: {
+    $on: {
+      get () {
+      }
+    }
+  },
+  data: {
+    _foo: null
+  },
+  methods: {
+    $nextTick () {
+    }
+  }
+}
+```
+
+## :wrench: Options
+
+This rule has an object option:
+
+`"reserved"`: [] (default) array of dissalowed names inside `groups`.
+
+`"groups"`: [] (default) array of additional groups to search for duplicates.
+
+### Example:
+
+```
+vue/no-dupe-keys: [2, {
+  reserved: ['foo']
+}]
+```
+
+:-1: Examples of **incorrect** code for this configuration
+
+```js
+export default {
+  computed: {
+    foo () {}
+  }
+}
+```