How optimize CSS and JS file?

How can I load CSS and JS faster?

Before you run your code through JSCompress, consider implementing asynchronous code loading first. Also referred to as “Lazy Loading” — but in the context of JavaScript, asynchronous loading works by dynamically loading functions. To use asynchronous loading, just add the “async” tag when calling the . js file.

How do I optimize a CSS file?

20 Tips for Optimizing CSS Performance

  1. Learn to Use Analysis Tools. You can’t address performance problems unless you know where the faults lie. …
  2. Make Big Wins First. …
  3. Replace Images with CSS Effects. …
  4. Remove Unnecessary Fonts. …
  5. Avoid @import. …
  6. Concatenate and Minify. …
  7. Use Modern Layout Techniques. …
  8. Reduce CSS Code.

How do I protect CSS and JS files?

Secure Your CSS And JavaScript Files

  1. Remove all your CSS and JavaScript files from the solution which needs security and place those files in the secured server.
  2. Store the base address of your secured server in your database table.
  3. Get the base address by calling the service (API) method.
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How do I make JavaScript files run faster?

Speed Up Your Javascript Load Time

  1. Find The Flab. …
  2. Compress Your Javascript. …
  3. Debugging Compressed Javascript. …
  4. Eliminating Tedium. …
  5. Optimize Javascript Placement. …
  6. Load Javascript On-Demand. …
  7. Delay Your Javascript. …
  8. Cache Your Files.

Does Minified code run faster?

Minification does improve performance for two reasons: Reduced file-size (because it removes comments and unnecessary white spaces), so your script loads faster. Even if it is embedded into the <head> . It is parsed faster, since comments and white spaces don’t have to be explicitly ignored (since they’re not there).

How do I make CSS load first?

If you want your site to load faster, place your CSS at the top in the <head> section and JavaScript at the bottom. This allows the browser to load your CSS first, so that users can see the content on your site load.

Is CSS slow?

Loading CSS from a lot of external files can be very slow as well. Clean code is always good, but typically there are other things that cause more serious performance concerns: Large images. I frequently encounter websites with background images weighing in at 2MB+ when they could easily be optimized further.

How do you clean up CSS?

How to remove unused CSS manually

  1. Open Chrome DevTools.
  2. Open the command menu with: cmd + shift + p.
  3. Type in “Coverage” and click on the “Show Coverage” option.
  4. Select a CSS file from the Coverage tab which will open the file up in the Sources tab.

How do you optimize CSS selectors?

In David’s article he offered some guidelines for writing efficient css selectors, which I’ll present below.

  1. Avoid Universal Rules.
  2. Don’t qualify ID Rules with tag names or classes.
  3. Don’t qualify Class Rules with tag names.
  4. Use the most specific category possible.
  5. Avoid the descendant selector.
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How do I protect JavaScript?

This means that anyone can steal your JavaScript code, modify it and reuse it for his own purposes. One of the ways to protect your code is to obfuscate it to encrypt the code and make it unreadable. Protect your code and intellectual property. Compact js to also make file size smaller and increase page speed.

How do I encrypt a CSS file?

css file together with encrypted html files, you should first encrypt the . css file, then modify and encrypt the html files. You can encrypt . css files only if you select them with the ‘Select file’ button.

How do I secure a CSS file in HTML?

CSS can be added to HTML documents in 3 ways:

  1. Inline – by using the style attribute inside HTML elements.
  2. Internal – by using a <style> element in the <head> section.
  3. External – by using a <link> element to link to an external CSS file.

Should all JavaScript be in one file?

To avoid multiple server requests, group your JavaScript files into one. Whatever you use for performance, try to minify JavaScript to improve the load time of the web page. If you are using single page application, then group all the scripts in a single file.

How big should JavaScript files be?

As a rule of thumb, most websites today consume ~300KB of bandwidth per page, including scripts, stylesheets and images. I don’t think you should worry too much about it. Usually, the images will consume most of your bandwidth and not Javascript files.

What is require () in JavaScript?

The require() method is used to load and cache JavaScript modules. So, if you want to load a local, relative JavaScript module into a Node. js application, you can simply use the require() method.

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