JavaScript String Functions With Example
JavaScript short name (JS) is a dynamic programming language. It can provide the dynamic interactivity on websites when it applied with HTML documents.
It was developed by Brendan Eich, co-founder of the Mozilla project, the Mozilla Foundation, and the Mozilla Corporation.

Below is the list of JavaScript string functions.
SN |
String Function |
Example |
1 |
trim() |
|
var s1="FreeWeb Mentor"; var s2=s1.trim(); document.write(s2); |
|
2 |
charAt(index) |
|
var myString = 'jQuery FTW!!!'; console.log(myString.charAt(7)); |
|
3 |
concat(str) |
|
var message="Hello" var finalWord=message.concat("This is a"," Cat.") //output: Hello This is a Cat alert(finalWord); |
|
4 |
lastIndexOf(str) |
|
var myString = 'FreeWeb Mentor'; //Output is 13 console.log(myString.lastIndexOf('r')); |
|
5 |
indexOf(str) |
|
var sentence="Hi, my name is Prem!" if (sentence.indexOf("Prem")!=-1) alert("Prem is in there!"); |
|
6 |
toLowerCase() |
|
var s1="Javascript Example"; var s2=s1.toLowerCase(); alert(s2); |
|
7 |
toUpperCase() |
|
var s1="Javascript Example"; var s2=s1.toUpperCase(); alert(s2); |
|
8 |
slice(beginIndex, endIndex) |
|
var text="freewebmentor"; text.slice(0,6); //returns "freewe" text.slice(2,6); //returns "eewe" |
|
9 |
split(delimiter, [limit]) |
|
var message="Welcome to FreeWebMentor!" var word=message.split("l") |
|
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