JavaScript Validator

JavaScript is the most popular programming language almost used by many tech giant companies like Google, Microsoft, Meta and Amazon and many other large companies. It is the common go to language for the websites and considered as the flagship programming language for web development.

JavaScript Validator validates the syntax and code written in JavaScript such that it compiles with the rules of the ECMAScript which is the standard specification of the JavaScript language and it is with no errors. JavaScript is the most used programming language, hence writing the efficient code without errors is very important when working on the industry specific large organization projects.

The main advantage of the JavaScript Validator is that it showcases the code errors that are made in the program and highlights them, including punctuation and other syntax-related errors.

JavaScript Online Validators

JavaScript Validators can be found extensively online for free and others at reasonable prices. It is recommended to use free websites found online. To do the free JavaScript validation online, go to the website, copy the code you have written and paste it into the text area. Then click on the button which validates the code and then you can easily find where you have made mistakes and can easily correct the errors.

JavaScript Code Linters

A JavaScript Validator may show syntax errors and different structural problems in the JavaScript code. But the code linters will do the advanced than simply locating errors. Using the JavaScript linters, there will be an extensive analysis done and point out the future problems that may arise in the JavaScript code. Linters will help to plan the performance of the code by providing suitable practices and documentation.

Example: ESLint

ESLint is the JavaScript linter that will check the structure and syntax of the code and points the potential mistakes done in the program. Let us see how to use and install this as an example:

Installation: To install the ESLint, we need to have Node JS in our system and can be installed through the node package manager(npm). Find below the command to install the ESLint.

Configuration: For configuring the installed file, we can simply create a file named, `.eslintrc.json` and enter the following lines.

Running : We can run the eslint by just writing the below command in cmd.

Other JavaScript Validators

There are other types of validators that can be installed and run in our systems. Let us see them:

1. JSHint : JSHint is also another popular error-detecting tool.

Installation :

Configuration: .jshintrc file

Running :

2. Flow

Flow is considered a static type checker which will verify the random bugs

Installation:

Configuration : .flowconfig file

Running:

Important Points of JavaScript Validator

• The validators can only be used with JavaScript only. The other programming languages cannot be used in the JavaScript editor.
• When using a JavaScript validator, it only checks for the syntax, punctuation, missing statements, and structure of the JavaScript code. Validators do not check the logic or the way functionality works will never be checked by the validator.
• It is considered to use a validator every time we write the code because it will clear the errors and make the code work smoothly.
• JavaScript Validator should not be confused with the integrated development environment. Because it only checks the structure of the JavaScript code and will not provide development and testing.