首先：原文在这 Quick Tip: Get URL Parameters with JavaScript
function getAllUrlParams(url) {
var queryString = url ? url.split('?')[1] : window.location.search.slice(1);
var obj = {};
if (queryString) {
queryString = queryString.split('#')[0];
var arr = queryString.split('&');
for (var i = 0; i < arr.length; i++) {
var a = arr[i].split('=');
var paramNum = undefined;
var paramName = a[0].replace(/\[\d*\]/, function(v) {
paramNum = v.slice(1, -1);
return '';
});
var paramValue = typeof(a[1]) === 'undefined' ? "" : a[1];
paramName = paramName.toLowerCase();
paramValue = paramValue.toLowerCase();
if (obj[paramName]) {
if (typeof obj[paramName] === 'string') {
obj[paramName] = [obj[paramName]];
}
if (typeof paramNum === 'undefined') {
obj[paramName].push(paramValue);
} else {
obj[paramName][paramNum] = paramValue;
}
} else {
obj[paramName] = paramValue;
}
}
}
return obj;
}
在这里小小的改动了一下
// set parameter value (use 'true' if empty)
var paramValue = typeof(a[1])==='undefined' ? true : a[1]; // (optional) keep case consistent
paramName = paramName.toLowerCase();
paramValue = paramValue.toLowerCase();
Optionally, you can set all parameter names and values to lowercase. That way, you can avoid situations where someone sends traffic to a url with example=TRUE instead of example=true and your script breaks (I’ve seen this happen). However, if your query string needs to be case sensitive, feel free to omit this part
paramName = paramName.toLowerCase();
paramValue = paramValue.toLowerCase();在原文中，如果参数对象值为空，就返回个布尔值。但显然 paramValue.toLowerCase()，不允许你这样做。
整篇感觉还是蛮不错的~~
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