How to read from Chrome's console in JavaScript

You can't. What's in the console can't be read from JavaScript.

What you can do is hook the console.log function so that you store when it logs :

console.stdlog = console.log.bind(console);
console.logs = [];
console.log = function(){
    console.logs.push(Array.from(arguments));
    console.stdlog.apply(console, arguments);
}

console.logs contains all what was logged. You can clean it at any time by doing console.logs.length = 0;.

You can still do a standard, non storing, log by calling console.stdlog.


get all console data

how to read browser console error in js?

How to read from Chrome's console in JavaScript

https://www.quora.com/How-do-I-read-console-window-errors-from-Chrome-using-JavaScript

logs

console.defaultLog = console.log.bind(console);
console.logs = [];
console.log = function(){
    // default &  console.log()
    console.defaultLog.apply(console, arguments);
    // new & array data
    console.logs.push(Array.from(arguments));
}

error

console.defaultError = console.error.bind(console);
console.errors = [];
console.error = function(){
    // default &  console.error()
    console.defaultError.apply(console, arguments);
    // new & array data
    console.errors.push(Array.from(arguments));
}

warn

console.defaultWarn = console.warn.bind(console);
console.warns = [];
console.warn = function(){
    // default &  console.warn()
    console.defaultWarn.apply(console, arguments);
    // new & array data
    console.warns.push(Array.from(arguments));
}

debug

console.defaultDebug = console.debug.bind(console);
console.debugs = [];
console.debug = function(){
    // default &  console.debug()
    console.defaultDebug.apply(console, arguments);
    // new & array data
    console.debugs.push(Array.from(arguments));
}

I have used this code in the past to capture all console activity and store it with types and timestamps in console.everything for sending back to the server for diagnosing form data entry issues. I run this code as early as possible in the <head> element.

if (console.everything === undefined)
{
    console.everything = [];

    console.defaultLog = console.log.bind(console);
    console.log = function(){
        console.everything.push({"type":"log", "datetime":Date().toLocaleString(), "value":Array.from(arguments)});
        console.defaultLog.apply(console, arguments);
    }
    console.defaultError = console.error.bind(console);
    console.error = function(){
        console.everything.push({"type":"error", "datetime":Date().toLocaleString(), "value":Array.from(arguments)});
        console.defaultError.apply(console, arguments);
    }
    console.defaultWarn = console.warn.bind(console);
    console.warn = function(){
        console.everything.push({"type":"warn", "datetime":Date().toLocaleString(), "value":Array.from(arguments)});
        console.defaultWarn.apply(console, arguments);
    }
    console.defaultDebug = console.debug.bind(console);
    console.debug = function(){
        console.everything.push({"type":"debug", "datetime":Date().toLocaleString(), "value":Array.from(arguments)});
        console.defaultDebug.apply(console, arguments);
    }
}

Tags:

Javascript

Google Chrome

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