js获取url中的参数

/**
 * 解析url参数
 * @example ?id=123456&a=b
 * @return Object {id: 123456, a:b}
 */
function urlParse () {
    let url = window.location.search
    let obj = {}
    let reg = /[?&][^?&]+=[^?&]+/g
    let arr = url.match(reg)
    if (arr) {
        arr.forEach(item => {
            let tmpArr = item.substring(1).split('=')
            let key = decodeURIComponent(tmpArr[0])
            let val = decodeURIComponent(tmpArr[1])
            obj[key] = val
        })
    }
    return obj
}