In this post, I’m telling you to Find unused CSS using a Chrome dev tool with easy steps.
What is Unused CSS?
The simple answer is that we delay that class in a CSS file, But never use it on an HTML File.
Example
Bootstrap frameworks come with dozens of CSS styles you probably don’t need in your Project.
Why should you remove unused CSS?
Your unused CSS increase the CSS file size. But conversely, the unused CSS file size decreases your web performance or Speed.
Secondly, Clean and orderly stylesheets are easier to delete and rewrite.
How to Find unused CSS?
Find Unused CSS in Chrome with Two Way
Manually
Run Command
Manually
Open Chrome DevTools
Click Three Dots On the Right Side
Click on the “More Tool” Find Coverage Tab option
Click On Reload Button
Select a CSS file from the Coverage tab, which will open the file up in the Sources tab.
Red Color CSS is Unused, and blue Color CSS is used in HTML files.
Run Command
Open Chrome DevTools.
Open the command menu with: cmd + shift + p
Type in “Coverage” and click on the “Show Coverage” option
Click On Reload Button.
Select a CSS file from the Coverage tab, which will open the file up in the Sources tab.
Red Color CSS is Unused, and blue Color CSS is used in HTML files.
How to Remove unused CSS?
Many Tools Find you online, Like UnusedCSS, PurgeCSS, and UnCSS. But My personal opinion never is used on small projects. Use on Large projects; take a backup of your Project, then use it.
Note
Never use Bootstrap. This all Npm tools UnusedCSS, PurgeCSS, and UnCSS. Make sure to Customize your Bootstrap, download it Locally and use it.
How to download the unused css coverage report?
First, select the CSS tab and then click the download icon button. Your unused css coverage report starts downloading; now you can share it with your friend, team and colleagues.
Chrome and Edge have a useful Coverage tool that can help identify which parts of code are unused. To detect unused code on page load: Open the Coverage tool by using the Command Menu: type Ctrl+Shift+P (or cmd+Shift+P on mac), then type Coverage and press Enter .
Usage. F12 open the Developer Tools, select the dom and active the "CSS Used" panel. The used CSS rules of the Selected dom and its descendants will be listed.
Simply right-click on the webpage, select "Inspect" or "Inspect Element," navigate to the "Sources" or "Network" tab, and look for the CSS files under the "Stylesheets" section.
Even if you use just one type of button on a page, it'll load all button styles. That's unused CSS. Reducing or removing unused CSS will improve your page speed performance and SEO.
Approach 1: Use css() method to check an element contains certain CSS styles or not. Example: This example uses css() method to check an element contains certain CSS style or not.
Click on the three vertical dots located on the top-right of Chrome dev tools. Select "More Tools" from the drop-down menu. You'll discover a variety of options when you click "More Tools." From the various options, select the CSS overview feature.
To extract HTML, CSS, and JS content from an existing website, you can use various software tools known as website scrapers or web crawlers. These tools allow you to download the website's source code, including the HTML markup, CSS stylesheets, and JavaScript files.
The Remove Unused CSS feature removes all CSS and stylesheets that are not used while keeping only the used CSS for each page. Remove Unused CSS is the recommended method of optimizing your CSS. If you have trouble with this option, check the status page, and/or try Load CSS Asynchronously instead.
WebElement cell = driver.findElement(By.cssSelector("td:contains('Item 1')")); The contains() pseudo-class accepts the text to be searched as a parameter.
CSS can be added to HTML documents in 3 ways: Inline - by using the style attribute inside HTML elements. Internal - by using a <style> element in the <head> section.
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