Update: improve warnings about key on template elements (#45)

* Update: add check for `key` attribute of child of templates (refs #43)

* New: no-template-key (fixes #43)

* replace emoji by github notation

Author: mysticatea

README.md

@@ -109,6 +109,7 @@ 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-template-key](./docs/rules/no-template-key.md) | disallow 'key' attribute on '<template>'. |
 
 <!--RULES_TABLE_END-->
 

docs/rules/html-end-tags.md

@@ -1,20 +1,20 @@
 # Enforce end tag style (html-end-tags)
 
-- 🔧 This rule is fixable with `eslint --fix` command.
+- :wrench: This rule is fixable with `eslint --fix` command.
 
 This rule enforce the way of end tags.
 
 - [Void elements] disallow end tags.
 - Other elements require end tags.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports the following elements:
 
 - [Void elements] which have end tags.
 - Other elements which do not have end tags and are not self-closing.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -28,7 +28,7 @@ This rule reports the following elements:
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -42,7 +42,7 @@ This rule reports the following elements:
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.
 

docs/rules/html-no-self-closing.md

@@ -1,15 +1,15 @@
 # Disallow self-closing elements (html-no-self-closing)
 
-- 🔧 This rule is fixable with `eslint --fix` command.
+- :wrench: This rule is fixable with `eslint --fix` command.
 
 Self-closing (e.g. `<br/>`) is syntax of XML/XHTML.
 HTML ignores it.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports every self-closing element except XML context.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -19,7 +19,7 @@ This rule reports every self-closing element except XML context.
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -33,6 +33,6 @@ This rule reports every self-closing element except XML context.
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.

docs/rules/html-quotes.md

@@ -8,11 +8,11 @@ You can choose quotes of HTML attributes from:
 
 This rule enforces the quotes style of HTML attributes.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports the quotes of attributes if it is different to configured quotes.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -23,7 +23,7 @@ This rule reports the quotes of attributes if it is different to configured quot
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -33,7 +33,7 @@ This rule reports the quotes of attributes if it is different to configured quot
 </template>
 ```
 
-👎 Examples of **incorrect** code for this rule with `"single"` option:
+:-1: Examples of **incorrect** code for this rule with `"single"` option:
 
 ```html
 <template>
@@ -44,7 +44,7 @@ This rule reports the quotes of attributes if it is different to configured quot
 </template>
 ```
 
-👍 Examples of **correct** code for this rule with `"single"` option:
+:+1: Examples of **correct** code for this rule with `"single"` option:
 
 ```html
 <template>
@@ -54,7 +54,7 @@ This rule reports the quotes of attributes if it is different to configured quot
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 - `"double"` (default) ... requires double quotes.
 - `"single"` ... requires single quotes.

docs/rules/no-confusing-v-for-v-if.md

@@ -6,15 +6,15 @@
 
 So when they exist on the same node, `v-if` directive should use the reference which is to the variables which are defined by the `v-for` directives.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports the elements which have both `v-for` and `v-if` directives in the following cases:
 
 - The `v-if` directive does not use the reference which is to the variables which are defined by the `v-for` directives.
 
 In that case, the `v-if` should be written on the wrapper element.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -26,7 +26,7 @@ In that case, the `v-if` should be written on the wrapper element.
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -48,6 +48,6 @@ In that case, the `v-if` should be written on the wrapper element.
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.

docs/rules/no-duplicate-attributes.md

@@ -3,20 +3,20 @@
 When duplicate arguments exist, only the last one is valid.
 It's possibly mistakes.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports duplicate attributes.
 `v-bind:foo` directives are handled as the attributes `foo`.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
     <div foo="abc" :foo="def"></div>
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -25,7 +25,7 @@ This rule reports duplicate attributes.
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.
 

docs/rules/no-invalid-template-root.md

@@ -2,7 +2,7 @@
 
 This rule checks whether every template root is valid.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports the template root in the following cases:
 
@@ -12,7 +12,7 @@ This rule reports the template root in the following cases:
 - The root element has `v-for` directives. E.g. `<template><div v-for="x in list">{{x}}</div></template>`.
 - The root element is `<template>` or `<slot>` elements. E.g. `<template><template>hello</template></template>`.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -38,7 +38,7 @@ This rule reports the template root in the following cases:
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -59,6 +59,6 @@ This rule reports the template root in the following cases:
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.

docs/rules/no-invalid-v-bind.md

@@ -2,7 +2,7 @@
 
 This rule checks whether every `v-bind` directive is valid.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports `v-bind` directives in the following cases:
 
@@ -13,7 +13,7 @@ This rule does not report `v-bind` directives which do not have their argument (
 
 This rule does not check syntax errors in directives because it's checked by [no-parsing-error] rule.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -25,7 +25,7 @@ This rule does not check syntax errors in directives because it's checked by [no
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -38,11 +38,11 @@ This rule does not check syntax errors in directives because it's checked by [no
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.
 
-## 👫 Related rules
+## :couple: Related rules
 
 - [no-parsing-error]
 

docs/rules/no-invalid-v-cloak.md

@@ -2,15 +2,15 @@
 
 This rule checks whether every `v-cloak` directive is valid.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports `v-cloak` directives in the following cases:
 
 - The directive has that argument. E.g. `<div v-cloak:aaa></div>`
 - The directive has that modifier. E.g. `<div v-cloak.bbb></div>`
 - The directive has that attribute value. E.g. `<div v-cloak="ccc"></div>`
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -22,7 +22,7 @@ This rule reports `v-cloak` directives in the following cases:
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -32,6 +32,6 @@ This rule reports `v-cloak` directives in the following cases:
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.

docs/rules/no-invalid-v-else-if.md

@@ -2,7 +2,7 @@
 
 This rule checks whether every `v-else-if` directive is valid.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports `v-else-if` directives in the following cases:
 
@@ -14,7 +14,7 @@ This rule reports `v-else-if` directives in the following cases:
 
 This rule does not check syntax errors in directives because it's checked by [no-parsing-error] rule.
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -26,7 +26,7 @@ This rule does not check syntax errors in directives because it's checked by [no
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -37,11 +37,11 @@ This rule does not check syntax errors in directives because it's checked by [no
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.
 
-## 👫 Related rules
+## :couple: Related rules
 
 - [no-invalid-v-if]
 - [no-invalid-v-else]

docs/rules/no-invalid-v-else.md

@@ -2,7 +2,7 @@
 
 This rule checks whether every `v-else` directive is valid.
 
-## 📖 Rule Details
+## :book: Rule Details
 
 This rule reports `v-else` directives in the following cases:
 
@@ -12,7 +12,7 @@ This rule reports `v-else` directives in the following cases:
 - The directive is on the elements that the previous element don't have `v-if`/`v-if-else` directives. E.g. `<div v-else></div>`
 - The directive is on the elements which have `v-if`/`v-if-else` directives. E.g. `<div v-if="foo" v-else></div>`
 
-👎 Examples of **incorrect** code for this rule:
+:-1: Examples of **incorrect** code for this rule:
 
 ```html
 <template>
@@ -24,7 +24,7 @@ This rule reports `v-else` directives in the following cases:
 </template>
 ```
 
-👍 Examples of **correct** code for this rule:
+:+1: Examples of **correct** code for this rule:
 
 ```html
 <template>
@@ -35,11 +35,11 @@ This rule reports `v-else` directives in the following cases:
 </template>
 ```
 
-## 🔧 Options
+## :wrench: Options
 
 Nothing.
 
-## 👫 Related rules
+## :couple: Related rules
 
 - [no-invalid-v-if]
 - [no-invalid-v-else-if]