Run javascript with link

Link JavaScript to Html & CSS | Include External JS

Link JavaScript to Html:- Javascript link is the most used every website. In today’s time, all the websites use it. There are many benefits to using it. This makes our website attractive. So We will explain in detail about it further.

These are some points which we explain to you in detail.

1. How to link javascript to HTML and CSS.
2. javascript includes external js.
3. link javascript to Html external.
4. External javascript file not working.
5. Internal javascript Html syntax.
6. In Body tag javascript link With examp[le

Link JavaScript to Html

So Now you understand What javascript link. From this, as we know this link. So we are giving you the JavaScript code and how we can use it below. We have given all the ways. You can use it as you want and we can use it with an example.

What is the javascript link:-

Javascript link is this code and some tags with which we run on our website and page. So that we can use it anywhere on the page and can also run from outside. It has the function to perform page link and event performance

As we know this JavaScript is a client-side scripting language. So we use JavaScript from tags and libraries. They have to provide many libraries, therefore, we require a JavaScript link.

JavaScript Include External Js

How to use Javascript external link. We do it from one page to another page. So Javascript external link is used. Either we can run our own custom code by creating an external link file.

In addition, we also provide our own libraries from which we called the CDN link. We can also use it below, you can see that we have given an example.

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JavaScript Where To

In HTML, JavaScript code is inserted between tags.

Example

Old JavaScript examples may use a type attribute: .
The type attribute is not required. JavaScript is the default scripting language in HTML.

JavaScript Functions and Events

A JavaScript function is a block of JavaScript code, that can be executed when «called» for.

For example, a function can be called when an event occurs, like when the user clicks a button.

You will learn much more about functions and events in later chapters.

JavaScript in or

You can place any number of scripts in an HTML document.

Scripts can be placed in the , or in the section of an HTML page, or in both.

JavaScript in

In this example, a JavaScript function is placed in the section of an HTML page.

The function is invoked (called) when a button is clicked:

Example

Demo JavaScript in Head

JavaScript in

In this example, a JavaScript function is placed in the section of an HTML page.

The function is invoked (called) when a button is clicked:

Example

Demo JavaScript in Body

Placing scripts at the bottom of the element improves the display speed, because script interpretation slows down the display.

External JavaScript

Scripts can also be placed in external files:

External file: myScript.js

External scripts are practical when the same code is used in many different web pages.

JavaScript files have the file extension .js.

To use an external script, put the name of the script file in the src (source) attribute of a tag:

Example

You can place an external script reference in or as you like.

The script will behave as if it was located exactly where the tag is located.

External scripts cannot contain tags.

External JavaScript Advantages

Placing scripts in external files has some advantages:

• It separates HTML and code
• It makes HTML and JavaScript easier to read and maintain
• Cached JavaScript files can speed up page loads

To add several script files to one page — use several script tags:

Example

External References

An external script can be referenced in 3 different ways:

• With a full URL (a full web address)
• With a file path (like /js/)
• Without any path

This example uses a full URL to link to myScript.js:

Example

This example uses a file path to link to myScript.js:

Example

This example uses no path to link to myScript.js:

Example

You can read more about file paths in the chapter HTML File Paths.

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HTML Anchors and Hyperlinks Link that runs JavaScript

Simply use the javascript: protocol to run the text as JavaScript instead of opening it as a normal link:

You can also achieve the same thing using the onclick attribute:

The return false; is necessary to prevent your page from scrolling to the top when the link to # is clicked. Make sure to include all code you’d like to run before it, as returning will stop execution of further code.

Also noteworthy, you can include an exclamation mark ! after the hashtag in order to prevent the page from scrolling to the top. This works because any invalid slug will cause the link to not scroll anywhere on the page, because it couldn’t locate the element it references (an element with id=»!» ). You could also just use any invalid slug (such as #scrollsNowhere ) to achieve the same effect. In this case, return false; is not required:

Should you be using any of this?

The answer is almost certainly no. Running JavaScript inline with the element like this is fairly bad practice. Consider using pure JavaScript solutions that look for the element in the page and bind a function to it instead. Listening for an event

Also consider whether this element is really a button instead of a link. If so, you should use .

PDF — Download HTML for free

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How do I Run Code I have Written in JavaScript?

To execute JavaScript code, you must employ an environment that can interpret and execute JavaScript code. It can be executed in a variety of ways. There are numerous online code editors available that allow you to write and execute JavaScript code in a browser window, such as a browser console, CodePen, and so on. You can also run/execute the JavaScript code in a command line interface or link the file with an HTML file.

This blog will demonstrate the ways to run the code written in JavaScript.

How to Run JavaScript Code?

To run your code written in JavaScript, use the following ways/solutions:

Solution 1: Run JavaScript Code on Browser Console

You can run your JavaScript code on the browser console. To do so, press the “F12” key or the “Ctrl + Shift + I”:

Enter your code and press the “Enter” key. Let’s see an example, to run the code on the browser console.

Create a variable “message” and store a string in it:

Print the message by calling the “console.log()” method:

After executing the above code, the output will be as follows:

You can also perform arithmetic operations in JavaScript on the console. Create two variables “x” and “y” and store values “25” and “5” respectively:

Multiply “x” and “y” using the operator “*” and store the result in the variable “product”:

Print the resultant value on the console:

Output

Note: If you have a JavaScript code file with “.js” extension, then move to the second solution.

Solution 2: Run JavaScript Code Linking with HTML File

You can also run the JavaScript code by linking it with the HTML file using the tag with the “src” attribute in the tag:

We have written the following code in the “JSfile.js” and linked it in a tag of an HTML file.

For printing message on the console:

For finding the product of two numbers “25” and “5”:

console. log ( «Find the product of two numbers in JavaScript» ) ;
var x = 25 ;
var y = 5 ;
var product = x * y ;
console. log ( «Product of 25 and 5 is » + product ) ;

It can be seen that the code has been successfully executed by linking the JS file with the HTML file:

Note: You can also run your JavaScript code using different frameworks and also you can run it from the “Node.js” command-line interface.

Conclusion

To run the JavaScript code, you can use online editors, such as “CodePen” or also use the browser console. You can link or attach your JavaScript file with the HTML file or use the “Node.js” command-line interface. This blog demonstrated different ways to run JavaScript code.

About the author

Farah Batool

I completed my master’s degree in computer science. I am an academic researcher and love to learn and write about new technologies. I am passionate about writing and sharing my experience with the world.

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