External Js File Example

Now add the external javascript file to the html web page. It increases the speed of the webpage. To use an external script put the name of the script file in the src source attribute of a script tag.

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Example let s say the name of the external file is demo js.

External js file example. It is recommended to embed all javascript files into a single file. Then add a line of code in all your web pages to point to your js file like this. Makes your life easier because you need to modify javascript in only one place when something changes or when you make a bug fix. In the external method the javascript code is contained in an entirely separate external document with a file extension of js.

The src attribute is used to include that external javascript file. Keeps your html files neater and less cluttered. Javascript files have the file extension js. Create external javascript file with the extension js.

This extension as you probably have already guessed stands for. For example we might use hello js as the name of the file for saving the javascript from the example above. Let s create an external javascript file that prints hello javatpoint in a alert dialog box. Let s say the following new js is our external javascript file.

Linking to the external script now that we have our javascript copied and saved into a separate file all we need to do is reference the external script file on our html web page document. Make sure the path and the file name are correct while you including it. Html body form input type button value result onclick display form script src new js script body html. Function msg.

An external javascript file must be saved by js extension. If you have more than one external javascript file then add it in the same web page to increase performance of the page. Creating a js file. If you have more than one external javascript file then add it in the same web page to increase performance of the page.

Where external javascript js is the external file to be included. Creating an external javascript file is similar to creating an html file or another other type of file. Make sure the path and the file name are correct while you including it. Function display alert hello world.

After creating add it to the html file in the script tag. So save the javascript code in a new file with the extension js.