一、解析 URL Params 为对象
let url = 'http://www.domain.com/?user=anonymous&id=123&id=456&city=%E5%8C%97%E4%BA%AC&enabled'; parseParam(url)
function parseParam(url) {
const paramsStr = /.+\?(.+)$/.exec(url)[1];
const paramsArr = paramsStr.split('&');
let paramsObj = {
};
paramsArr.forEach(param => {
if (/=/.test(param)) {
let [key, val] = param.split('=');
val = decodeURIComponent(val);
val = /^\d+$/.test(val) ? parseFloat(val) : val;
if (paramsObj.hasOwnProperty(key)) {
paramsObj[key] = [].concat(paramsObj[key], val);
} else {
paramsObj[key] = val;
}
} else {
paramsObj[param] = true; } })return paramsObj;
}