How to Link JavaScript to HTML

Linking JavaScript to HTML is a key step in creating web applications. By doing so, you can add interactivity to your web pages and make them more dynamic. In this article, we’ll show you how to do it.

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JavaScript is a client-side scripting language that can be used to add interactivity to HTML pages. In order for your JavaScript code to actually do something, you will need to link it to your HTML page.

There are two ways to do this – either using the `

If you have a larger amount of code, or if you want to keep your code in a separate file, you can use the `src` attribute within the `

Basic HTML Linking

In order for your JavaScript code to be executed by the browser, you will need to incorporate it into an HTML file. This can be done in two ways - either by embedding the JavaScript code directly into your HTML file or by linking to an external JavaScript file.

Embedding JavaScript Code Directly Into HTML
The first method of adding JavaScript to your HTML file is by embedding the code directly between the tags in your HTML document. Any code placed between these tags will be executed by the browser when the page loads.

For example, let's say we want to add a simple alert to our page that says "Hello, world!". We would do this by adding the following code between our

Any code placed in this external JavaScript file will be executed by the browser when the page loads.

Linking to a File on Your Server

To link to a file on your server, you will need to know the full path or URL to the file. The path is the location on your server where the file is located. The URL is the address that people will use to access the file.

If you have a domain name, you can use that as your URL. For example, if your domain is, you can use as your URL.

If you do not have a domain name, you will need to use the IP address of your server. For example, if your IP address is 123.456.789.001, you can use http://123.456.789.001/file.js as your URL

Linking to an External JavaScript File

If you have more than one HTML page that contains the same script, you can put the script in an external file and link to it:

Create a new text document and type your script into it.
Save the file as filename.js
In the head section of each page where you want to use the script, add a line which says:

Linking to a JavaScript Function

If you have written a function in JavaScript, you may want to run that function when an event occurs on your website. For example, you might want to run a function when a user clicks on a button or link, or when they move their mouse over an element on the page.

To do this, you need to link your JavaScript code to your HTML code. This process is known as 'linking' or 'binding' the code together. You can do this by adding an 'onclick' attribute to your HTML elements.

For example, let's say you have a button on your website with the following code:



You can bind a function to this button so that it runs when the button is clicked by adding the 'onclick' attribute:
//Notice how we've added "myFunction()" inside the quotes. This will run our function when the button is clicked. It's important to remember that unlike CSS and HTML, JavaScript is case sensitive, so make sure you use the correct spelling and casing for your function. For example, if your function was called "MyFunction", the code above would not work because it would be looking for a function called "myfunction" which doesn't exist. If you're not sure whether your function is being called correctly, you can always use the browser console to check for errors. In Google Chrome, you can open the console by pressing Command + Option + J (on Mac) or Control + Shift + J (on Windows).```


In conclusion, linking JavaScript to HTML is very simple. All you need to do is add the script tags to your HTML code and put the JavaScript code in between the tags. That's it! Now you know how to link JavaScript to HTML.

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