获取URL参数

        var urlParams = getUrlParams();
        function getUrlParams(){
            var url = document.URL;
            let urlStr = url.split('?')[1]
            let obj = {};
            if (urlStr) {
                let paramsArr = urlStr.split('&')
                for(let i = 0,len = paramsArr.length;i < len;i++){
                    let arr = paramsArr[i].split('=')
                    obj[arr[0]] = decodeURI(arr[1]);    //对 encodeURI() 函数编码过的 URI 进行解码
                }
            }
            return obj
        };