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()
1
2
3
vars1="FreeWeb Mentor";
vars2=s1.trim();
document.write(s2);
2
charAt(index)
1
2
varmyString='jQuery FTW!!!';
console.log(myString.charAt(7));
3
concat(str)
1
2
3
4
5
varmessage="Hello"
varfinalWord=message.concat("This is a"," Cat.")
//output: Hello This is a Cat
alert(finalWord);
4
lastIndexOf(str)
1
2
3
varmyString='FreeWeb Mentor';
//Output is 13
console.log(myString.lastIndexOf('r'));
5
indexOf(str)
1
2
3
varsentence="Hi, my name is Prem!"
if(sentence.indexOf("Prem")!=-1)
alert("Prem is in there!");
6
toLowerCase()
1
2
3
vars1="Javascript Example";
vars2=s1.toLowerCase();
alert(s2);
7
toUpperCase()
1
2
3
vars1="Javascript Example";
vars2=s1.toUpperCase();
alert(s2);
8
slice(beginIndex, endIndex)
1
2
3
vartext="freewebmentor";
text.slice(0,6);//returns "freewe"
text.slice(2,6);//returns "eewe"
9
split(delimiter, [limit])
1
2
varmessage="Welcome to FreeWebMentor!"
varword=message.split("l")
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About: Prem Tiwari
Prem Tiwari is the founder of FreeWebMentor.com and also a professional developer who has vast experience in PHP and open source technologies. Apart from this, he is a blogger by hobby and also he has been a regular speaker of WordPress sessions in various IT Companies. View all posts by Prem Tiwari
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