JavaScript Tutorial Series Introduction To JavaScript

JavaScript Can Change HTML Content

One of many JavaScript HTML methods is getElementById().

This example uses the method to “find” an HTML element (with id=”demo”) and changes the element content (innerHTML) to “Hello JavaScript”:


document.getElementById("demo").innerHTML = "Hello JavaScript";

JavaScript accepts both double and single quotes:

JavaScript Can Change HTML Attribute Values

In this example, JavaScript changes the value of the src (source) attribute of an  tag:

What Can JavaScript Do?

JavaScript can change HTML attribute values.

In this case, JavaScript changes the value of the src (source) attribute of an image.

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