File extension .JS
Full Name | Developer | Category |
---|---|---|
JavaScript Format | N/A | Web Files |
The .JS file extension is used to store files that have been written using the JavaScript scripting language. JavaScript is an interpreted programming language developed by Netscape, which is also used by many of the world's leading web browser applications. It is primarily used to create interactive web applications and client-side scripts. JavaScript is a loosely typed, prototype-based language that is syntactically similar to C, but has added features such as object-oriented programming capabilities.
Functionality
The majority of the code in a .JS file consists of functions that perform tasks when called upon by a web page or another .JS file. These functions can manipulate HTML documents, forms or variables, or perform client-side validation of user entries. JavaScript files can also trigger animations, create cookies and carry out image slideshows.
Compatibility
The .JS file must be compatible with whatever software program in which it is being used. All modern web browsers support JavaScript at some level; however, they may interpret the code differently. Additionally, this extension can also be used with some development tools such as Visual Studio Code, Geany, Notepad++, and other software applications that support .JS, .JSON, and other related extensions.
Programs for WINDOWS system
Programs for MAC system
Programs for LINUX system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .JS) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .JS extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .JS file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .JS extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .JS extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .JS file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .JS file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .JS file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .JS file) will be extended to the maximum.
It is also good to check
- if the .JS file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines

Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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