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JS File - What is a .js file and how do I open it?
Learn about .JS files and view a list of programs that open them.
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Overview
What is a JS file? A JS file is a plain text file that contains JavaScript code. It is used to execute JavaScript instructions in a webpage. JS files may include functions that open and close windows, validate form fields, enable rollover images, or create dropdown menus.
More Information JS file open in Microsoft Visual Studio Code Web developers use JavaScript to add dynamic and interactive elements to webpages. One of the ways developers can add JavaScript functions to a webpage is by importing them using a JS file. Developers usually import JS files in the <head> or <body> sections of a webpage's HTML, as shown below: <head> <script type="text/javascript" src="FileInfo.comExample.js"></script> </head> JS files often contain standard or site-wide functions that a developer wants to include on each of a site's webpages. Storing the functions in a single, importable JS file makes them easier to maintain and troubleshoot.
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DeveloperMicrosoft
Popularity3.6 | 93 Votes
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In-Depth
.JS File Extension
2 file types use the .js file extension.
JavaScript File
| Developer | ECMA International |
| Popularity |
4.0 | 313 Votes |
NEW: Open your .JS file online with File Helper . View Online
What is a JS file?
A JS file is a plain text file that contains JavaScript code. It is used to execute JavaScript instructions in a webpage. JS files may include functions that open and close windows, validate form fields, enable rollover images, or create dropdown menus.
More Information
JS file open in Microsoft Visual Studio Code
Web developers use JavaScript to add dynamic and interactive elements to webpages. One of the ways developers can add JavaScript functions to a webpage is by importing them using a JS file.
Developers usually import JS files in the <head> or <body> sections of a webpage's HTML, as shown below:
<head> <script type="text/javascript" src="FileInfo.comExample.js"></script> </head>
JS files often contain standard or site-wide functions that a developer wants to include on each of a site's webpages. Storing the functions in a single, importable JS file makes them easier to maintain and troubleshoot.
How to open a JS file
You can open and edit a JS file in any text or source code editor. Source code editors, such as Microsoft Visual Studio Code and GitHub Atom contain helpful syntax-highlighting and code-editing tools that make reading and editing JS files easier.
Programs that open JS files
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Pricing
Program Name
Platform
Reset
X
Windows
File Viewer Plus
—
Get it from Microsoft
Free +
Adobe Dreamweaver 2021
Free Trial
Adobe ColdFusion Builder
Free Trial
Microsoft Visual Studio 2022
Free +
Microsoft Visual Studio Code
Free
JetBrains IntelliJ IDEA
Free Trial
ES-Computing EditPlus
Free Trial
Github Atom
—
Discontinued
Free
Brackets
Free
Any text editor
Any web browser
Mac
Adobe Dreamweaver 2021
Free Trial
Adobe ColdFusion Builder
Free Trial
Apple Dashcode
Free
Bare Bones BBEdit
Free Trial
MacroMates TextMate
Free
Microsoft Visual Studio Code
Free
Github Atom
—
Discontinued
Free
Brackets
Free
Any text editor
Any web browser
Linux
Microsoft Visual Studio Code
Free
Github Atom
—
Discontinued
Free
Any web browser
Any text editor
Web
FileHelper.com
Free
Android
File Viewer for Android
Free +
Category: Web Files
Updated: April 22, 2022
JScript Executable Script
| Developer | Microsoft |
| Popularity |
3.6 | 93 Votes |
A JS file may also be a script written in JScript, a Microsoft implementation of JavaScript designed to run on Windows-based systems. JS files contain executable code that automates tasks primarily in web development or Windows applications. For example, users may embed JS scripts in .HTML webpages for form validation or automate tasks in Windows to manage files.
More Information
Microsoft released JScript in 1996 to be compatible with the Microsoft software ecosystem, most notably, the Internet Explorer browser. It is similar to JavaScript but bears various deficiencies, including security issues. Microsoft eventually discontinued support for JScript in favor of JavaScript (also saved as .JS files), which offers broader cross-platform support.
How to open a JS file
You can open and edit JS files with any text or source code editor, including Microsoft Notepad , Apple TextEdit , and Microsoft Visual Studio Code .
Programs that open JS files
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Pricing
Program Name
Platform
Reset
X
Windows
Windows-based script host (Wscript.exe)
Microsoft Notepad
Included with OS
Microsoft Visual Studio Code
Free
Any text editor
Mac
Apple TextEdit
Included with OS
Microsoft Visual Studio Code
Free
Any text editor
Linux
gedit
Free
Microsoft Visual Studio Code
Free
Any text editor
Category: Executable Files
Updated: October 17, 2024