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JavaScript Getting Started

You must have some knowledge of HTML and CSS to learn JavaScript.

You can add JavaScript to your web page by using three ways:

1. You can Embed the JavaScript code between a pair of <script> and </script> tag.

For Example

<script>
    var greet = "Hello World!";
    document.write(greet); 
</script>

Output

2. You can create an external JavaScript file with the .js extension and then load it within the page through the src attribute of the <script> </script> tag.

For Example

<button type="button" id="myBtn">Click Me</button>
<script src="/assets/tutorial_demo_test/test.js"></script>

Output

3. You can also place JavaScript code inside the HTML tag by using the special tag attributes such as onclick, onmouseover, onkeypress, onload, etc.

For Example

<button onclick="alert('Hello World!')">Click Me</button>

Output