javascript - JavaScript：覆盖alert（）(JavaScript: Overriding alert())

Question

Has anyone got any experience with overriding the alert() function in JavaScript?(有没有人有重写JavaScript中的alert()函数的经验？)

• Which browsers support this?(哪些浏览器支持此功能？)
• Which browser-versions support this?(哪些浏览器版本支持此功能？)
• What are the dangers in overriding the function?(覆盖该功能有哪些危险？)

  ask by cllpse translate from so

Answer 1

It's definitely "supported".(绝对是“受支持的”。)

It is your web page, you do whatever you want to with it.(这是您的网页，您可以使用它进行任何操作。)

I already did this to track analytics events without modifying a library but by sneaking into events.(我已经这样做，无需修改库而是通过潜入事件来跟踪分析事件。)

Use the proxy pattern:(使用代理模式：)

(function(proxied) {
  window.alert = function() {
    // do something here
    return proxied.apply(this, arguments);
  };
})(window.alert);

You can also bypass the call to the original function if you want (proxied)(如果需要，也可以绕过对原始函数的调用（代理）)

More info here: JQuery Types #Proxy Pattern(更多信息在这里： jQuery类型#Proxy模式)