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Thursday, February 27, 2014

Replace Text in Strings in javascript



Here in this article we will discuss about how we can replace some text in Strings in javascript.

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The string object provides the replace method for just such purposes.

The following process creates a variable and assigns text to it, replaces that text with
new text, and then displays the results in a browser:

1. Open a new HTML document in your preferred HTML or text editor.

2. Create the body of the document with opening and closing body tags:

<body>
</body>

3. Insert a script block in the body of the document:
<script language="JavaScript">
<!--
// -->
</script>

4. Create a variable named myVariable and assign the value "Hello there" to it:

var myVariable = "Hello there";

5. Create a second variable named newVariable and assign the results of replacing "there" with "Raj" to it:

var newVariable =
myVariable.replace("there","Raj");

6. Display the results of the search and replace so the final page looks like below.

<body>
<script language="JavaScript">
<!--
var myVariable = "Hello there";
var newVariable =
myVariable.replace("there","Raj");
document.write(newVariable);
// -->
</script>
</body>

7. Save the file and close it.

8. Open the file in a browser. You should see the text "Hello Raj" displayed in the browser.



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