我想到一种方法可以使用定时器setTimeout，类似于这样function $(string){ return document.getElementById(string); } setTimeout("",1000);想请教各位有没有更好的方法呢，也不使用库，其实我很想知道jquery里是怎么操作的。

问答 2016-06-15 来自：开发者社区

最近在公司用 PHP 做一个小软件, 其中有几处要求对用户提交的 JS 代码校验其语法. 我安装了 v8js 扩展, 将提交的代码包裹在函数里"var x = function() { 用户JS代码 }", 用这样的方式来校验客户代码而不用去执行它.经实验效果不错, 但是问题是, 上面的方式可能被聪明的用户利用, 引起注入的危险. 如客户输入代码"}; 某些危险代码", 这可能会造成大麻烦.请问....

问答 2016-06-13 来自：开发者社区

使用js 计算rem 如何使该段js最优先执行

!(function(doc, win) { var docEl = doc.documentElement, resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize', recalc = function() { var clientWidt...

问答 2016-06-13 来自：开发者社区

php文件里js执行不成功，什么原因？

我想把上传文件路径返回到前端保存，但是后台php文件里的js没有执行，前台input标签里的value值一直为空后台acceptfile.php代码如下:前端index.php里form表单：请问问题出在哪，文件是有保存到相应的文件夹里的，就是路径没法返回到前端form表单里

问答 2016-06-08 来自：开发者社区

有没有方法让所有jsp页面都能执行同一段代码,比如加入标签库啊,调用css啊或者Javascript啊

我想能不能把所有冗余jsp代码都放在放在一个文件或者函数,一调就相当于能把所有都的代码都写在jsp页面中

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