The replace() is an inbuilt function in TypeScript which is used to find a match between a regular expression and a string, and replaces the matched substring with a new substring.
Syntax:
string.replace(regexp/substr, newSubStr/function[, flags]);
Parameter: This method accept five parameter as mentioned above and described below:
- regexp: This parameter is a RegExp object.
- substr: This parameter is a String that is to be replaced.
- newSubStr: This parameter is a String that replaces the substring.
- function: This parameter is a function to be invoked to create the new substring.
- flags: This parameter is a String containing any combination of the RegExp flags.
Return Value: This method returns a new changed string.
Below example illustrate the String replace() method in TypeScriptJS:
Example 1:
JavaScript
<script> // Original strings var str = "Geeksforneveropen - Good Platform"; var re = /Good/gi; // Use of String replace() Method var newstr = str.replace(re, "Best"); console.log(newstr); </script> |
Output:
Geeksforneveropen - Best Platform
Example 2:
JavaScript
<script> // Original strings var str = "Geeksforneveropen TypeScript"; var re = /(\w+)\s(\w+)/; // use of String replace() Method var newstr = str.replace(re, "$2 $1"); console.log(newstr); </script> |
Output:
TypeScript Geeksforneveropen
