eslint-html-parser

eslint-html-parser

Custom ESLint parser for HTML files that falls back to using espree or another JavaScript parser for .js and .jsx files and for <script> tags within the HTML.

Installation

$ npm install --save-dev eslint eslint-html-parser

• Requires Node.js 6.x or later
• Requires ESLint 6.x or later

Usage

• Add the parser option to your .eslintrc.* file.
• Use glob patterns or the --ext CLI option

{
    "parser": "eslint-html-parser"
}

$ eslint "src/**/*.{js,htm,html}"
# or
$ eslint --ext .htm --ext .html --ext .js src

Options

Within your .eslintrc.* file, the parserOptions property supports the same options as espree. For example:

{
    "parser": "eslint-html-parser",
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 2018,
        "ecmaFeatures": {
            "globalReturn": false,
            "impliedStrict": false,
            "jsx": false
        }
    }
}

The only additional option under parserOptions is parser, which specifies the JavaScript parser that eslint-html-parser will fall back to in order to parse JavaScript. This option defaults to espree.

Usage for custom rules/plugins

HTML files are parsed into an AST, which can be traversed, examined, and linted with the visitor pattern like any other ESLint source. The HTML AST that is produced has the following types of nodes and structure:

• HTMLElement

  • tagName: string
  • parent: HTMLElement
  • attributes: HTMLAttribute[]
  • children: (HTMLElement | HTMLText | HTMLWhitespace | HTMLComment)[]

• HTMLAttribute

  • parent: HTMLElement
  • attributeName: HTMLAttributeName
  • attributeValue: HTMLAttributeValue

• HTMLAttributeName

  • parent: HTMLAttribute
  • value: string

• HTMLAttributeValue

  • parent: HTMLAttribute
  • value: string

• HTMLText

  • parent: HTMLElement
  • value: string

• HTMLWhitespace

  • parent: HTMLElement
  • value: string

• HTMLComment

  • parent: HTMLElement
  • text: string

• HTMLProcessingInstruction

  • target: string
  • data: string

Note: The children property for HTMLElement nodes for <script> tags will contain the AST resulting from parsing the script's text.