How i you write external .js scripts?

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January 3rd, 2013, 10:37 AM

XooKi3

Registered User

Join Date: Jan 2013

Posts: 1

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How i you write external .js scripts?

hello all,

I am just starting to learn the java lingo. done abit on codeacademy and have just started on the w3schools site today.

Anyways i have come across the external scripting part and basically my question is what JavaScript will i put in the "myScript.js" file? i tried to write my own .js file, i put a function in it to change the "A Paragraph." text on the button click

Code:

<html>
<body>

<h1>My Web Page</h1>

<p id="demo">A Paragraph.</p>

<button type="button" onclick="myFunction()">Try it</button>

<p><strong>Note:</strong> myFunction is stored in an external file called "myScript.js".</p>

<script type="text/javascript" src="myScript.js"></script>

</body>
</html>

Sorry if that made no sense, i am very very green when it comes to all of this (as you can probably tell :P)

Any help is much appreciated.

January 3rd, 2013, 12:27 PM

stdunbar

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Join Date: May 2004

Location: Superior, CO, USA

Posts: 2,398

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Send a message via Google Talk to stdunbar

I'll never forgive Netscape and Sun for the marketing driven rename of Mocha and LiveScript to JavaScript. Regardless of how they sound, JavaScript and Java have nothing really in common other than they are both programming languages. They are aimed at very different areas. Take a look at this post for a bit more information.

Nevertheless, many of us bridge both worlds. You would write in your JavaScript file any code that you might normally put into an HTML file. For example (derived from here)

html Code:

Original - html Code
<!DOCTYPE html> <html> <head> <script> function myFunction() { alert("Hello! I am an alert box!"); } </script> </head> <body> <input type="button" onclick="myFunction()" value="Show alert box" /> </body> </html>


<!DOCTYPE html>
<html>
<head>
<script>
function myFunction() {
    alert("Hello! I am an alert box!");
}
</script>
</head>
<body>

<input type="button" onclick="myFunction()" value="Show alert box" />

</body>
</html>

Or...

The file hello.html

html Code:

Original - html Code
<!DOCTYPE html> <html> <head> <script type="text/javascript" src="hello.js"></script> </head> <body> <input type="button" onclick="myFunction()" value="Show alert box" /> </body> </html>

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="hello.js"></script>
</head>
<body>

<input type="button" onclick="myFunction()" value="Show alert box" />

</body>
</html>

and the file hello.js

javascript Code:

Original - javascript Code
function myFunction() { alert("Hello! I am an alert box!"); }

function myFunction() {
    alert("Hello! I am an alert box!");
}

You're simply putting the JavaScript into a separate file.

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How i you write external .js scripts?

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