A small CommonJS module for fetching the value of a given url param.

get-query-variable.js

module.exports = function(variable) {
    //get query params and remove the beginning '?'
    var query = window.location.search.substring(1);

    //split on ampersand
    var vars = query.split('&');
    
    //loop through 'vars' array
    for (var i = 0; i < vars.length; i++) {
        // split on '=' to give key value pairs
        var pair = vars[i].split('=');

        // if key matchs key supplied to function
        if (pair[0] == variable) {
            // return the value of the param that has matched
            return pair[1];
        }
    }
    
    return false;
};

usage.js

// require the module
var getQueryVariable = require('./get-query-variable');

// fetch query variable
var page = getQueryVariable('page');

// live the dream
alert(page);