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How to find a string within a jQuery or javascript string

Posted By : Shailendra Chauhan, 13 Apr 2013
Total Views : 39,144   
 

Sometimes, you required to find a the existence of a small string with in a string. This article will demonstarte, how could you do by using plain JavaScript.

First Method

//returns -1 if doesn't contains
if (str.indexOf("Hello") >= 0) 
{
 //string contains Hello
}
//OR
//For your are not sure about the case of the string
//returns -1 if doesn't contains
if (str.toLowerCase().indexOf("hello") >= 0)
{
 //string contains hello
}
This indexOf() method will return the position of the match, or -1 if it isn’t found.

Second Method

//returns false if doesn't contains
if (/hello/i.test(str))
{
 //string contain Hello
}
What do you think?

I hope you will enjoy the tips while playing with JavaScript. I would like to have feedback from my blog readers. Your valuable feedback, question, or comments about this article are always welcome.

 
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About the Author
Hey! I'm Shailendra Chauhan full-time author, consultant & trainer. I have more than 6 years of hand over Microsoft .NET technologies and other web technologies like JavaScript, AngularJS, NodeJS etc. I am an entrepreneur, the founder & chief editor of www.dotnet-tricks.com and www.dotnettricks.com. I am author of most popular e-books for technical Interview on ASP.NET MVC Interview Questions and Answers & AngularJS Interview Questions and Answers & LINQ Interview Questions and Answers.
I have delivered 100+ training sessions to professional world-wide over Microsoft .NET technologies such C#, ASP.NET MVC, WCF, Entity Framework and other mobile technologies such Ionic, PhoneGap, Corodva. Read more...
 
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