Regx for 2 terms?

try index of function like below -

var sentence="Hi branch-result I am pawan"
if (sentence.indexOf("branch-result")!=-1)
alert("yes got branch-result")

if (sentence.indexOf("App/Locator")!=-1)
alert("yes got App/Locator")

you can also look at the other javascript string functions.
https://www.sitepoint.com/15-javascript-string-functions/

I understand that but I thought a single line regx would be more eficient?

I dont think you need regex for this kind of thing. Regex is more of a like search. in this case we know the final strings we are searching.

branch-result|App/Locator
Whether or not it is more efficient may depend on details of your implementation and application

It just looks like this could be a lot more efficient?

return (function() { 
    "use strict";
    var currQS = '';
    try {
        if((window.location.href.indexOf("branch-result")!==-1)||(window.location.href.indexOf("App/Locator")!==-1)) {
            var regex = new RegExp('[\\?&]address=([^&#]*)');
            currQS = regex.exec(location.search);
            return currQS === null ? '' : decodeURIComponent(currQS[1].replace(/\+/g, ' '));   
        }
    }catch(e) {}
	return currQS;
})();

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What about:

if (window.location.href.match(/(branch-result|App\/Locator))) 

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So in this case, which would be more efficient as far as performance?

if((window.location.href.indexOf("branch-result")!==-1)||(window.location.href.indexOf("App/Locator")!==-1)) {

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 or this approach:

if (window.location.href.match(/(branch-result|App\/Locator)/g)){

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