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JavaScript HTML DOM-changing HTML

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Author: User
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JavascriptHTML DOM-changing HTML

The HTML DOM allows JavaScript to change the contents of an HTML element.

Changing the HTML output stream

JavaScript is able to create dynamic HTML content:

Today's date is: Mon June 18:23:35 gmt+0800 (China Standard Time)

In JavaScript, document.write () can be used to write content directly to the HTML output stream.

Example <! DOCTYPE html>
<body>

<script>
document.write (Date ());
</script>

</body>
Try it»

Never use document.write () after the document has finished loading. This overwrites the document.

Change HTML Content

The simplest way to modify HTML content is to use the InnerHTML property.

To change the contents of an HTML element, use this syntax:

document.getElementById ( ID). innerhtml= New HTML

This example changes the contents of the <p> element:

Examples <body>

<p id= "P1" >hello world!</p>

<script>
document.getElementById ("P1"). Innerhtml= "New text!";
</script>

</body>
Try it»

This example changes the contents of the

Example <! DOCTYPE html>
<body>


<script>
var Element=document.getelementbyid ("header");
Element.innerhtml= "New Header";
</script>

</body>
Try it»

Example Explanation:

      • The above HTML document contains the

      • We use the HTML DOM to get the id= "header" element

      • JavaScript changes the contents of this element (InnerHTML)

Changing HTML Properties

To change the attributes of an HTML element, use this syntax:

document.getElementById ( ID). attribute=new Value

This example changes the SRC attribute of the element:

Example <! DOCTYPE html>
<body>



<script>
document.getElementById ("image"). src= "Landscape.jpg";
</script>

</body>
Try it»

Example Explanation:

      • The above HTML document contains the elements of the id= "image"

      • We use the HTML DOM to get the elements of the id= "image"

      • JavaScript changes the attributes of this element (change "smiley.gif" to "landscape.jpg")

JavaScript HTML DOM-changing HTML

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Related Keywords:
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