How to check if a query string value is present via JavaScript?

Question

How can I check if the query string contains a q= in it using JavaScript or jQuery?

Answer 1

Try this

//field "search";
var pattern = /[?&]search=/;
var URL = location.search;

if(pattern.test(URL))
{
    alert("Found :)");
}else{
    alert("Not found!");
}

JSFiddle: https://jsfiddle.net/codemirror/zj4qyao2/