Question

Need to replace a substring in URL (technically just a string) with javascript.
The string like

http://blah-blah.com/search?par_one=test&par_two=anothertest&SearchableText=TO_REPLACE

or

http://blah-blah.com/search?par_one=test&SearchableText=TO_REPLACE&par_two=anothertest

means, the word to replace can be either at the most end of the URL or in the middle of it.
I am trying to cover these with the following:

var newWord = NEW_SEARCH_TERM;
var str = 'http://blah-blah.com/search?par_one=test&SearchableText=TO_REPLACE&par_two=anothertest';
var regex = /^\S+SearchableText=(.*)&?\S*$/;
str = str.replace(regex, newWord);

But no matter what I do I get str = NEW_SEARCH_TERM. Moreover the regular expression when I try it in RegExhibit, selects the word to replace and everything that follows it that is not what I want.

How can I write a universal expression to cover both cases and make the correct string be saved in the variable?

Answer 1

str.replace(/SearchableText=[^&]*/, 'SearchableText=' + newWord)