JS獲取url地址中的參數的值

<script>
        function getQueryString(name) {
            var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
            var r = window.location.search.substr(1).match(reg);
            if (r != null) return decodeURIComponent(r[2]); return '';
        }
</script>

舉例：blog.csdn.net/weixin_38330185?title=sub&key=mmm

console.log(getQueryString('title'))輸出結果爲“sub”

console.log(getQueryString('key'))輸出結果爲“mmm”