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Style Sheets

With IntelliJ IDEA, you can write style definitions in CSS as well as in various languages that compile into it, such as Sass, Less, , or Stylus.

You can also look up documentation for Style Sheets, create and move rulesets, introduce variables, and more.

Before you start

Make sure the CSS plugin is enabled in the settings. Press Ctrl+Alt+S to open the IDE settings and select Plugins. Click the Installed tab. In the search field, type CSS. For more details about plugins, see Managing plugins.

Code completion

IntelliJ IDEA provides code completion for properties, their values, selectors, variables, and mixins.

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Complete Style Sheet classes

Completion for CSS, SCSS, Less, and Sass classes and ids is available in HTML files, in various types of templates (for example, in Angular or Vue.js), as well as in JSX code.

In HTML files, IntelliJ IDEA first suggests classes and ids from the style tag and files linked with link tags. If no matching results are found, IntelliJ IDEA also suggests symbols defined in all stylesheet files in the project. To see all classes and ids defined in the project straight away, before you start typing, press Ctrl+Space twice.

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Complete Style Sheet classes from external libraries

With IntelliJ IDEA, you can also get completion for class names from Twitter Bootstrap or other CSS libraries that are linked from a CDN in an HTML file without adding these libraries to your project dependencies.

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  1. Open the HTML file with a CDN link to an external CSS library. IntelliJ IDEA highlights the link.

  2. To enable completion for the library, press Alt+Enter on the link and select Download library from the list. Alternatively, hover the mouse over the link and click Download library.

The library is added to the list of JavaScript libraries on the Settings | Languages and Frameworks | JavaScript | Libraries page, see for details.

Complete Sass and SCSS selectors

IntelliJ IDEA also provides completion for Sass and SCSS selectors - including and selectors created with an ampersand (&).

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Search and navigation

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  • To find usages of a Style Sheet symbol, place the caret at it and press Alt+F7. Learn more from .

  • To jump from a usage of a Style Sheet symbol to its definition, press Ctrl+B. Navigation to definition is available for classes, ids, selectors - including nested selectors and selectors with an ampersand & - as well as for variables and mixins.

    Learn more from .

Documentation look-up

For properties and pseudo-elements, IntelliJ IDEA can show you a summary from the corresponding MDN article. This summary is displayed in the Documentation popup which shows a brief description of the property and its values, as well as information about its compatibility with various browsers.

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If the property is available in all versions of browsers, IntelliJ IDEA does not show any information about its compatibility.

Otherwise, the Documentation popup also lists the browsers and their versions that support the property.

Note that compatibility is checked only for Chrome, Chrome Android, Safari, Safari iOS, Firefox, Internet Explorer, and Edge.

For selectors, IntelliJ IDEA also shows their .

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View documentation for a property

  • Position the caret at the property and press Ctrl+Q or select View | Quick Documentation Lookup from the main menu.

  • When you hover the mouse pointer over a property, IntelliJ IDEA immediately displays the reference for it in the Documentation popup.

    You can turn off this behavior or configure the popup to appear faster or slower, see below.

Configure the behavior of Documentation popup

  • To turn off showing documentation automatically when you hover the mouse over code symbols, Click in the popup and disable the Show on Mouse Move option.

  • To have the Documentation popup shown faster or slower, open the Settings dialog (Ctrl+Alt+S), go to Editor | General | Code Completion, then select the Show the documentation popup checkbox and specify the delay time.

Open the MDN documentation in the browser

  • In the Documentation popup Ctrl+Q, click the link at the bottom.

  • Press Shift+F1 or select View | External Documentation from the main menu.

Formatting

With IntelliJ IDEA built-in formatter, you can reformat fragments of Style Sheet code as well as entire files and folders to meet the language-specific code style requirements. The formatter also wakes up automatically when you generate or refactor your code.

  • To configure formatting for a Style Sheet language, open the Settings dialog (Ctrl+Alt+S), go to Editor | Code Style | Style Sheets | , and configure the language-specific settings for tabs and indents, spaces, wrapping and braces, hard and soft margins, and so on.

    In the CSS, SCSS, and Less context, IntelliJ IDEA by default uses double quotes for generated string literals in import statements and URLs. To use single quotes, open the Other tab, and select Single from the Quote marks list.

    To apply the chosen style to the entire file after reformatting, select the Enforce on format checkbox below the list.

    Currently changing the configuration for quotation marks does not affect injected style sheets and CSS code inside the