Walking through the First JavaScript

JavaScript Tutorials - Herong's Tutorial Examples

∟Walking through the First JavaScript

This section provides a walkthrough of the first JavaScript - 'Hello World!'.

Now let me walkthrough the first JavaScript code, "Hello World!", provided in the previous tutorial:

1 <html>
2 <head><title>Hello World!</title></head>
3 <body>
4 <script type="text/javascript">
5    document.write('Hello World!');
6 </script>
7 </body>
8 </html>

The first 3 lines are normal HTML tags.

Line 4 has a special HTML tag <script> that starts a section of JavaScript code. Notice that the type="text/javascript" attribute indicates that the script contained in the tag is a JavaScript code.

Line 5 is the only JavaScript statement in this HTML document, which calls the write() function of the built-in object "document". This call will output the string "Hello World!" into the HTML document.