html-eslint Rules 
- 🔧: Meaning the rule can fix problems automatically by running eslint
--fixoptions. - ⭐: Meaning the rule is recommended.
Best Practice
| Rule | Description | |
|---|---|---|
| no-duplicate-attrs | Disallow to use duplicate attributes | ⭐ |
| no-duplicate-id | Disallow to use duplicate id | ⭐ |
| no-inline-styles | Disallow using inline style | |
| no-obsolete-tags | Disallow to use obsolete elements in HTML5 | ⭐ |
| no-restricted-attr-values | Disallow specified attributes | |
| no-restricted-attrs | Disallow specified attributes | |
| no-script-style-type | Enforce to omit type attributes for style sheets and scripts | 🔧 |
| no-target-blank | Disallow usage of unsafe target='_blank' | |
| require-attrs | Require specified attributes | |
| require-button-type | Require use of button element with a valid type attribute. | |
| require-closing-tags | Require closing tags. | ⭐🔧 |
| require-doctype | Require <!DOCTYPE HTML> in html, | ⭐🔧 |
| require-li-container | Enforce <li> to be in <ul>, <ol> or <menu>. | ⭐ |
| require-meta-charset | Enforce to use <meta charset="..."> in <head> |
SEO
| Rule | Description | |
|---|---|---|
| no-multiple-h1 | Disallow multiple <h1></h1>. | ⭐ |
| require-lang | Require lang attribute at <html> tag | ⭐ |
| require-meta-description | Require use of <meta name="description"> in <head> | |
| require-open-graph-protocol | Enforce to use <meta name="viewport"> in <head> | |
| require-title | Require <title><title/> in the <head><head/> | ⭐ |
Accessibility
| Rule | Description | |
|---|---|---|
| no-abstract-roles | Disallow to use of abstract roles | |
| no-accesskey-attrs | Disallow to use of accesskey attribute | |
| no-aria-hidden-body | Disallow to use aria-hidden attributes on the body element. | |
| no-non-scalable-viewport | Disallow use of user-scalable=no in <meta name="viewport">. | |
| no-positive-tabindex | Disallow use of positive tabindex. | |
| no-skip-heading-levels | Disallow skipping heading levels | |
| require-frame-title | Require title in <frame>, <iframe> | |
| require-img-alt | Require alt attribute at <img> tag | ⭐ |
| require-meta-viewport | Enforce to use <meta name="viewport"> in <head> |
Style
| Rule | Description | |
|---|---|---|
| element-newline | Enforce newline between elements. | ⭐🔧 |
| id-naming-convention | Enforce consistent naming id attributes | |
| indent | Enforce consistent indentation | ⭐🔧 |
| lowercase | Enforce to use lowercase for tag and attribute names. | 🔧 |
| no-extra-spacing-attrs | Disallow an extra spacing around attributes | ⭐🔧 |
| no-multiple-empty-lines | Disallow multiple empty lines | 🔧 |
| no-trailing-spaces | Disallow trailing whitespace at the end of lines | 🔧 |
| quotes | Enforce consistent quoting attributes with double(") or single(') | ⭐🔧 |
| sort-attrs | Enforce attributes alphabetical sorting | 🔧 |