Rule is empty ошибка css

Uncorrect warning «Do not use empty rulesets» about vscode-styled-jsx HOT 3 OPEN

This happens anytime there is a JS variable, and it also breaks Prettier / code formatting. Any possible fix to this? Quite a problem for being able to use styled-jsx. I’m not sure if the problem is with this plugin though — it is a VSCode issue perhaps?

ryanjwessel commented on June 15, 2020 1

I also noticed this issue. This seems to be a VSCode issue and can be handled by setting «css.lint.emptyRules»: «ignore» in your settings.json file. But, ideally, the styled-jsx-language-server extension would handle this gracefully.

OIlmania-Iloma commented on April 15, 2021

I also encountered this issue in Visual Studio Code.
How do I make the correction in JSON?
I am creating a new project to master JVS CSS and HTML

file?

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CSS, SCSS and Less

Visual Studio Code has built-in support for editing style sheets in CSS .css , SCSS .scss and Less .less . In addition, you can install an extension for greater functionality.

Tip: Click on an extension tile above to read the description and reviews to decide which extension is best for you. See more in the Marketplace.

IntelliSense

VS Code has support for selectors, properties and values. Use ⌃Space (Windows, Linux Ctrl+Space ) to get a list of context specific options.

Proposals contain extensive documentation, including a list of browsers that support the property. To see the full description text of the selected entry, use ⌃Space (Windows, Linux Ctrl+Space ) .

Syntax coloring & color preview

As you type, there is syntax highlighting as well as in context preview of colors.

Clicking on a color preview will launch the integrated color picker which supports configuration of hue, saturation and opacity.

Tip: You can trigger between different color modes by clicking on the color string at the top of the picker.

You can hide VS Code’s color previews by setting the following setting:

To just disable it for css, Less and SCSS, use

Folding

You can fold regions of source code using the folding icons on the gutter between line numbers and line start. Folding regions are available for all declarations (for example, rule declarations) and for multiline comments in the source code.

Additionally you can use the following region markers to define a folding region: /*#region*/ and /*#endregion*/ in CSS/SCSS/Less or // #region and // #endregion In SCSS/Less.

If you prefer to switch to indentation based folding for CSS, Less and SCSS, use:

Emmet snippets

Emmet abbreviation support is built into VS Code, suggestions are listed along with other suggestions and snippets in the editor auto-completion list.

Tip: See the CSS section of the Emmet cheat sheet for valid abbreviations.

Syntax Verification & Linting

There is support for CSS version <= 2.1, Sass version <= 3.2 and Less version <= 2.3.

Note: You can disable VS Code’s default CSS, Sass or Less validation by setting the corresponding .validate User or Workspace setting to false.

Go to Symbol in file

You can quickly navigate to the relevant CSS symbol in the current file by pressing ⇧⌘O (Windows, Linux Ctrl+Shift+O ) .

Hovers

Hovering over a selector or property will provide an HTML snippet that is matched by the CSS rule.

Go to Declaration and Find References

This is supported for Sass and Less variables in the same file. CSS variables per the draft standards proposal are also supported.

There is jump to definition for @import and url() links in CSS, SCSS and Less.

CSS custom data

You can extend VS Code’s CSS support through a declarative custom data format. By setting css.customData to a list of JSON files following the custom data format, you can enhance VS Code’s understanding of new CSS properties, at-directives, pseudo-classes and pesudo-elements. VS Code will then offer language support such as completion & hover information for the provided properties, at-directives, pseudo-classes and pesudo-elements.

You can read more about using custom data in the vscode-custom-data repository.

Formatting

The CSS Languages Features extension also provides a formatter. The formatter works with CSS, LESS and SCSS. It is implemented by the JS Beautify library and comes with the following settings:

• css.format.enable — Enable/disable default CSS formatter.
• css.format.newlineBetweenRules — Separate rulesets by a blank line.
• css.format.newlineBetweenSelectors — Separate selectors with a new line.
• css.format.spaceAroundSelectorSeparator — Ensure a space character around selector separators ‘>’, ‘+’, ‘

The same settings also exist for less and scss .

Transpiling Sass and Less into CSS

VS Code can integrate with Sass and Less transpilers through our integrated task runner. We can use this to transpile .scss or .less files into .css files. Let’s walk through transpiling a simple Sass/Less file.

Step 1: Install a Sass or Less transpiler

For this walkthrough, let’s use either the sass or less Node.js module.

Note: If you don’t have Node.js and the npm package manager already installed, you’ll need to do so for this walkthrough. Install Node.js for your platform. The Node Package Manager (npm) is included in the Node.js distribution. You’ll need to open a new terminal (command prompt) for npm to be on your PATH.

Step 2: Create a simple Sass or Less file

Open VS Code on an empty folder and create a styles.scss or styles.less file. Place the following code in that file:

For the Less version of the above file, just change $padding to @padding .

Note: This is a very simple example, which is why the source code is almost identical between both file types. In more advanced scenarios, the syntaxes and constructs will be much different.

Step 3: Create tasks.json

The next step is to set up the task configuration. To do this, run Terminal > Configure Tasks and click Create tasks.json file from template. In the selection dialog that shows up, select Others.

This will create a sample tasks.json file in the workspace .vscode folder. The initial version of file has an example to run an arbitrary command. We will modify that configuration for transpiling Sass/Less instead:

Step 4: Run the Build Task

As this is the only command in the file, you can execute it by pressing ⇧⌘B (Windows, Linux Ctrl+Shift+B ) (Run Build Task). The sample Sass/Less file should not have any compile problems, so by running the task all that happens is a corresponding styles.css file is created.

Since in more complex environments there can be more than one build task we prompt you to pick the task to execute after pressing ⇧⌘B (Windows, Linux Ctrl+Shift+B ) (Run Build Task). In addition, we allow you to scan the output for compile problems (errors and warnings). Depending on the compiler, select an appropriate entry in the list to scan the tool output for errors and warnings. If you don’t want to scan the output, select Never scan the build output from the presented list.

At this point, you should see an additional file show up in the file list styles.css .

If you want to make the task the default build task to run execute Configure Default Build Task from the global Terminal menu and select the corresponding Sass or Less task from the presented list.

Note: If your build fails or you see an error message such as «An output directory must be specified when compiling a directory», be sure the filenames in your tasks.json match the filenames on disk. You can always test your build by running sass styles.scss styles.css from the command line.

Automating Sass/Less compilation

Let’s take things a little further and automate Sass/Less compilation with VS Code. We can do so with the same task runner integration as before, but with a few modifications.

Step 1: Install Gulp and some plug-ins

We will use Gulp to create a task that will automate Sass/Less compilation. We will also use the gulp-sass plug-in to make things a little easier. The Less plug-in is gulp-less.

We need to install gulp both globally ( -g switch) and locally:

Note: gulp-sass and gulp-less are Gulp plug-ins for the sass and lessc modules we were using before. There are many other Gulp Sass and Less plug-ins you can use, as well as plug-ins for Grunt.

You can test that your gulp installation was successful by typing gulp -v in the terminal. You should see a version displayed for both the global (CLI) and local installations.

Step 2: Create a simple Gulp task

Open VS Code on the same folder from before (contains styles.scss / styles.less and tasks.json under the .vscode folder), and create gulpfile.js at the root.

Place the following code in the gulpfile.js file:

What is happening here?

1. Our default gulp task first runs the sass or less task once when it starts up.
2. It then watches for changes to any SCSS/Less file at the root of our workspace, for example the current folder open in VS Code.
3. It takes the set of SCSS/Less files that have changed and runs them through our respective compiler, for example gulp-sass , gulp-less .
4. We now have a set of CSS files, each named respectively after their original SCSS/Less file. We then put these files in the same directory.

Step 3: Run the gulp default task

To complete the tasks integration with VS Code, we will need to modify the task configuration from before to run the default Gulp task we just created. You can either delete the tasks.json file or empty it only keeping the «version»: «2.0.0» property. Now execute Run Task from the global Terminal menu. Observe that you are presented with a picker listing the tasks defined in the gulp file. Select gulp: default to start the task. We allow you to scan the output for compile problems. Depending on the compiler, select an appropriate entry in the list to scan the tool output for errors and warnings. If you don’t want to scan the output, select Never scan the build output from the presented list. At this point, if you create and/or modify Less or SASS files, you see the respective CSS files generated and/or changes reflected on save. You can also enable Auto Save to make things even more streamlined.

If you want to make the gulp: default task the default build task executed when pressing ⇧⌘B (Windows, Linux Ctrl+Shift+B ) run Configure Default Build Task from the global Terminal menu and select gulp: default from the presented list.

Step 4: Terminate the gulp default Task

The gulp: default task runs in the background and watches for file changes to Sass/Less files. If you want to stop the task, you can use the Terminate Task from the global Terminal menu.

Customizing CSS, SCSS and Less Settings

You can configure the following lint warnings as User and Workspace Settings.

The validate setting allows you turn off the built-in validation. You would do this if you rather use a different linter.

To configure an option for CSS, use css.lint. as the prefix to the id; for SCSS and Less, use scss.lint. and less.lint. .

Set a setting to warning or error if you want to enable lint checking, use ignore to disable it. Lint checks are performed as you type.

Next steps

Read on to find out about:

— Dig into Tasks to help you transpile your SCSS and Less to CSS. — Learn about the powerful VS Code editor. — Move quickly through your source code. — CSS is just the start, HTML is also very well supported in VS Code.

Common questions

Does VS Code provide a color picker?

Yes, hover over a CSS color reference and the color picker is displayed.

Is there support for the indentation based Sass syntax (.sass)?

No, but there are several extensions in the Marketplace supporting the indented flavor of Sass, for example, the Sass extension originally created by Robin Bentley, now maintained by Leonard Grosoli.

empty rulesets should not output about css-whitespace CLOSED

A declarative, efficient, and flexible JavaScript library for building user interfaces.

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Recommend Topics

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In CSS, a ruleset is one of the basic building blocks that make up a stylesheet:

.example {
    font-size: 1.25rem;
    color: red;
}

An empty ruleset is one that doesnt have any property declarations, just a selector:

#id {
}

As you note, these rules dont have any effect on the rendering of a document, but some browsers will consume them when evaluating CSS only to find nothing there. Performance junkies detest any unnecessary overhead of this sort, so its better to scrub them for the sake of cleanliness. In fact, CSS Lint has a rule specifically against empty rulesets, and Code is simply linting your CSS on-the-fly with the same set of rules.

However, empty rulesets can be useful in working around certain browser bugs such as this one. In such situations, removing the empty ruleset actually has adverse effects on page rendering, so they should be left there, ideally with a comment documenting their purpose.

You can disable linting by setting css.validate to false in your settings.json file. See the documentation for how to do this.

html – Visual Studio Code CSS error Do not use empty rulesets