如何修改另一个函数收到的XMLHttpRequest响应文本？

一种非常简单的解决方法是更改

responseText

Object.defineProperty(wrapped, 'responseText', {     writable: true});

因此，您可以

XMLHttpRequest

(function(proxied) {    XMLHttpRequest = function() {        //cannot use apply directly since we want a 'new' version        var wrapped = new(Function.prototype.bind.apply(proxied, arguments));        Object.defineProperty(wrapped, 'responseText', { writable: true        });        return wrapped;    };})(XMLHttpRequest);

演示版