将JavaScript控制台错误写入弹出窗口

Question

I have the following code, my goal is to write to a pop up the console error message that results from calling the function "func". I am currently running it in chrome and although I get an error in the console I get no pop up. The reason I am doing this is that I will be running my code in another environment where I won't have access to the console so I would like to be able to extract the error messages so I can view them.

 function func(){ return y } (function() { var exLog = console.log; console.log = function(msg) { exLog.apply(this, arguments); alert(msg); } })() func() 

Answer 1

You can use window.onerror to log the errors

window.onerror = function(msg) {
    alert(msg);
}