获取页面传来的参数

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

测试
abcd.html?name=xyz
应该弹出xyz

查找参数是否存在

location.search.match

<div>
    <script>
        if (location.search.match('debugGome')) {
            var scriptLoad = document.createElement('script');
            scriptLoad.type = 'text/javascript';
            scriptLoad.src = '//js.gomein.net.cn/csr/common/vconsole/vconsole.js';
            document.getElementsByTagName('head')[0].appendChild(scriptLoad);
            setTimeout(function () {
                var domVconsole = document.querySelector('#__vconsole');
                if (domVconsole) {
                    domVconsole.style.fontSize = '.28rem';
                }
            }, 1000)
        }
    </script>
</div>