Find Last Occurrence of Regex Word

Question

How can I find the last occurrence of a word with word boundaries? I created a regex expression of /\btotal\b/ for the word. How would I use search() to find the last occurrence of this expression? Thanks in advance for the help!

Answer 1

Without using the lookaheads but using the same regex (having applied the g, i.e. global, flag), the option would be to match the string with regex and get the last match.

var matches = yourString.match(/\btotal\b/g);
var lastMatch = matches[matches.length-1];

Answer 2

You can use negative lookahead to get the last match:

/(\btotal\b)(?!.*\b\1\b)/

RegEx Demo 1

RegEx Demo 2

(?!.*\1) is negative lookahead to assert that captured group #1 i.e. total word is NOT present ahead of the present match.