Get the text after a specific word

Question

Let say I have the following strings:

var Y = "TEST"  var X = "abc 123 TEST 456 def" 

I would like to get the string from X that comes after the word that specified in Y.

In this example it will be:

var Z = " 456 def" 

Answer 1

Probably the fastest way will be to use .slice, .substr or .substring:

var Z = X.slice(X.indexOf(Y) + Y.length); 

However there are some other alternatives, like with regular expressions:

var Z = X.replace(new RegExp('.*' + Y), ''); 

Or the one with arrays, proposed by @AustinBrunkhorst in the comments:

var Z = X.split(Y).pop();