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JavaScript String

String Search

WE can search for presence of a string inside a main string in client side JavaScript by using string.search function. If the search string is found inside the main string then it will return the position or the index of the location of the string. Note that the index of first letter is 0. If the string is not found inside the main string then it returns -1. We can check this and start building this example code here.

We are checking the presence of a sub string http:// inside a main string. We used if else condition checking to display a message based on the returned value. Here is the code.

var my_str="Welcome to http://www.plus2net.com"
var str="http://";
document.write (my_str.search(str));

if(my_str.search(str)==-1){
document.write(my_str.indexOf("Not Found inside string"));}
else{document.write("Found inside the string and the location of the sub string is ");
document.write (my_str.search(str));}

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Narendran13-03-2010
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