JavaScript indexOf() - how to get specific index

let s = 'http://something.com/somethingheretoo'; parts = s.split('/'); parts.splice(0, 2); return parts.join('/'); 

Try something like the following function, which will return the index of the nth occurrence of the search string s, or -1 if there are n-1 or fewer matches.

String.prototype.nthIndexOf = function(s, n) { var i = -1; while(n-- > 0 && -1 != (i = this.indexOf(s, i+1))); return i; } var str = "some string to test"; alert(str.nthIndexOf("t", 3)); // 15 alert(str.nthIndexOf("t", 7)); // -1 alert(str.nthIndexOf("z", 4)); // -1 var sub = str.substr(str.nthIndexOf("t",3)); // "test" 

Of course if you don't want to add the function to String.prototype you can have it as a stand-alone function by adding another parameter to pass in the string you want to search in.

If you want to stick to indexOf:

var string = "http://something/sth1/sth2/sth3/" var lastIndex = string.indexOf("/", lastIndex); lastIndex = string.indexOf("/", lastIndex); lastIndex = string.indexOf("/", lastIndex); string = string.substr(lastIndex); 

If you want to get the path of that given URL, you can also use a RE:

string = string.match(/\/\/[^\/]+\/(.+)?/)[1]; 

This RE searches for "//", accepts anything between "//" and the next "/", and returns an object. This object has several properties. propery [1] contains the substring after the third /.

Another approach is to use the Javascript "split" function:

var strWord = "me/you/something"; var splittedWord = strWord.split("/"); 

splittedWord[0] would return "me"

splittedWord[1] would return "you"

splittedWord[2] would return "something"

It sounds like you want the pathname. If you're in a browser, keep an a element handy...

var _a = document.createElement('a'); 

...and let it do the parsing for you.

_a.href = "http://something.com/somethingheretoo"; alert( _a.pathname.slice(1) ); // somethingheretoo 

DEMO: http://jsfiddle.net/2qT9c/

In your case, you could use the lastIndexOf() method to get the 3rd forward slash.

Here's a very cool way of handling this: How can I remove all characters up to and including the 3rd slash in a string?

My preference of the proposed solutions is

var url = "http://blablab/test/page.php"; alert(url.split("/")[3]); //-> "test" 

Inestead of using indexOf it is possible to do this this way:

const url = 'http://something.com/somethingheretoo'; const content = new URL(url).pathname.slice(1);