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@jslegers

jslegers/parsequery.js

Last active Apr 10, 2018
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How to parse a query string
function parseQuery(str) {
var qso = {};
var qs = (str || document.location.search);
// Check for an empty querystring
if (qs == "") {
return qso;
}
// Normalize the querystring
qs = qs.replace(/(^\?)/, '').replace(/;/g, '&');
while (qs.indexOf("&&") != -1) {
qs = qs.replace(/&&/g, '&');
}
qs = qs.replace(/([\&]+$)/, '');
// Break the querystring into parts
qs = qs.split("&");
// Build the querystring object
for (var i = 0; i < qs.length; i++) {
var qi = qs[i].split("=");
qi = qi.map(function(n) {
return decodeURIComponent(n)
});
if (typeof qi[1] === "undefined") {
qi[1] = null;
}
if (typeof qso[qi[0]] !== "undefined") {
// If a key already exists then make this an object
if (typeof (qso[qi[0]]) == "string") {
var temp = qso[qi[0]];
if (qi[1] == "") {
qi[1] = null;
}
qso[qi[0]] = [];
qso[qi[0]].push(temp);
qso[qi[0]].push(qi[1]);
} else if (typeof (qso[qi[0]]) == "object") {
if (qi[1] == "") {
qi[1] = null;
}
qso[qi[0]].push(qi[1]);
}
} else {
// If no key exists just set it as a string
if (qi[1] == "") {
qi[1] = null;
}
qso[qi[0]] = qi[1];
}
}
return qso;
}
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