How can I prevent the “console.log()” function from being overwritten?

Question

我需要一种方法来防止console.log()被更改/覆盖（例如： console.log = function(){ return "Hi" } 。起初，我尝试了Object.freeze(console.log)但这并没有做任何事情。

Answer 1

You can freeze the object console instead of the attribute. Object.freeze(console)

Answer 2

You can use Object.defineProperty to make the property non-writable and non-configurable:

 Object.defineProperty(console, 'log', { value: console.log, writable: false, configurable: false }); // Below won't work now, and will throw in strict mode: console.log = () => null; console.log('foobar');

You may also wish to make window.console non-overwritable as well:

 Object.defineProperty(console, 'log', { value: console.log, writable: false, configurable: false }); Object.defineProperty(window, 'console', { value: console, writable: false, configurable: false }); // Below won't work now, and will throw in strict mode: console.log = () => null; // Below won't work either: window.console = { dir: () => null }; console.log('foobar'); console.log('barbaz');