JavaScript

How to replace strings in JavaScript?

How to replace strings in JavaScript?, someone asked me to explain?

In this article we will discuss to replace strings in JavaScript by using replace() method. It searches a given specified string and replaces with the replacement values.

For example:

If we want to replace tutorials with techniques

<script type="text/javascript">

    var myString = "infinetsofttutorials";

    var result = myString.replace("tutorials", "techniques");

    alert(result);

  </script>

 

Output:

Replace string using javascript

Replace string with case sensitive:

A regular expression between 2 forward slashes(//) and letter g after last forward slash. This is case sensitive below example describes about it.

<script type="text/javascript">

    var myString = "A Black pen is on the black table.";

    var result = myString.replace(/black/g, "white");

    alert(result);
</script>
 

Output:

with case sensitive

Replace string with case insensitive:

Same as that of case sensitive instead of g after the forward slash here we are using gi. The is case insensitive.

<script type="text/javascript">

    var myString = "ABlack pen is on the black table.";

    var result = myString.replace(/black/gi, "red");

    alert(result);

  </script>

 

Output:

with case insensitive

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