It is a very important process to check and test the code to find any potential errors so that it can be eliminated in time before it is placed on the website. The process of code inspection is also commonly known as linting between web designers and developers. As a designer, if you want to write highly optimized code, you must need linting tools. There are two types of code checking tools. One is to check for errors and bugs in the code during execution time. The other is to use static code analysis techniques and check the code before execution. The latter is obviously better because it can save time and trouble.
In fact, linting can be placed at different stages. If you like to test the code while typing, then you can use the lint tool. Of course, if you want to keep the file or execute the lint code during the stage, then the linting tool can also do as you wish. It depends on the individual's choice. If you are looking for the best linting tools for CSS and JavaScript, then continue reading.
1.CSSLint
Admittedly CSSLint will "hurt your feelings", but in exchange it will "make your code a lot better". CSSLint currently leads the market for CSSlinting. It is written in JavaScript, not only open source, but also comes with a large number of configuration options.
2.SublimeLinter CSSLint
CSSLint is such an efficient CSSlinting tool that it is difficult to find a competitor that can match it. Maybe that's why the SublimeLinterlinting framework builds its CSSlinting plugin on top of CSSLint. SublimeLinter is a SublimeText plugin that provides users with lint code (CSS, PHP, Python, Java, Ruby, etc.).
3.StyleLint
StyleLint can help developers avoid syntax errors that can be parsed in CSS, SCSS, or any other PostCSS. StyleLint has tested more than a hundred rules, and you can choose those rules you want to switch (see this example configuration).
4.W3C CSS Validator
Although W3C's CSS Validator is not usually considered a linting tool, it provides developers with a good opportunity to check CSS code with official W3C standards. W3C builds its own verification program, aiming to provide a tool similar to the Lint program inspector for C language.
5.Dirty Markup
Dirty Markup can clean, format and verify your HTML, CSS, and JavaScript code. If you like simple and straightforward design and want a quick solution, then you're right to choose it. Dirty Markup can throw error messages and notifications in real time when you write or modify code in the editor.
6.JSLint
JSLint was originally released in 2002 by Douglas Crockford and has been thriving since then, so you can safely identify it as a stable and reliable JavaScript linting tool.
7.JSHint
JSHint is a community-driven project that begins with an effort to create a more configurable, less stubborn version of JSLint. JSHint allows developers to configure any of its linting options and then put custom configurations into a separate file, which makes the tool easy to reuse and therefore is perfect for large projects.
8.ESLint
ESLint is a recent big event in the JavaScript linting macro. It is popular because of its highly flexible nature. Not only can you customize a large number of cutting-edge linting rules, integrate them with all the major code editors, but you can easily extend their functionality by adding different plugins.
9.JSCS
JSCS, or JavaScript Code Style, is a pluggable code style linter for JavaScript, used to check code format rules. The goal of JSCS is to provide a method to implement a programmatically comply with a certain encoding style wizard. While JSCS doesn't check for bugs and errors, it's still used by many players in high-tech industries such as Google, AirBnB, and AngularJS, as it helps developers maintain a highly readable and consistent code base.
10.StandardJS
StandardJS, or JavaScript Standard Style is a code style linter, a bit like JSCS, but the difference is that it is simpler and straightforward. StandardJS is a great choice if you don't want to spend time on configuration and just want an efficient tool that works out of the box.
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Original English: 10 CSS and JavaScript Linting Tools for Code Optimization