How to capture console. log () Output in JS _ javascript skills

This article mainly introduces how to capture the console in JS. log () output method. The instance analyzes how to obtain the console. the log output technique has some reference value. If you need it, you can refer to the examples in this article to illustrate how to capture the console in JS. log () output method. Share it with you for your reference. The specific analysis is as follows:

We know that console. log () can output information to the debugger for developers to view. But what if we want to get the output result of console. log () in JS? In fact, it is not difficult to save the original console. log and replace it with another implementation. The Code is as follows:

Var lastLog; console. oldLog = console. log; console. log = function (str) {console. oldLog (str); lastLog = str;} console. log ("Hello, Neo"); document. write (lastLog );

In this case, "Hello, Neo" is saved in the lastLog.

I hope this article will help you design javascript programs.