有没有办法判断JavaScript中的函数是否已被覆盖?

Although the suggestion on namespacing is apt, you may also be interested in the writable and configurable properties of Object.defineProperty descriptors if you wanted to prevent overwriting of specific functions:Object.defineProperty(window, "myUnchangeableFunction", {value: function () { alert("Can't change me");}, writable: false, configurable: false});/*function myUnchangeableFunction () { // TypeError: can't redefine non-configurable property 'myUnchangeableFunction' alert('change?');}var myUnchangeableFunction = function () { // TypeError: can't redefine non-configurable property 'myUnchangeableFunction' alert('change?');};*/myUnchangeableFunction();但是，由于某些较旧的浏览器可能不支持此功能，因此应在希望支持的浏览器中检查支持.You should check support in the browsers you wish to support, however, as some older browsers might not support this functionality. 这篇关于有没有办法判断JavaScript中的函数是否已被覆盖?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！