如何在JavaScript中获取console.log内容作为字符串 [英] How to get the console.log content as string in JavaScript
问题描述
我想在纯JavaScript中获得console.log作为字符串。
我的输入是一个脚本,我不熟悉,我想收集console.log中的所有消息到一个字符串。
I'm trying to get the console.log as string in pure JavaScript. My input is a script, which I'm not familiar with, and I want to collect all the messages in the console.log into a string.
例如:
function doSomething(){
console.log("start");
console.log("end");
var consoleLog = getConsoleLog();
return consoleLog;
}
function getConsoleLog(){
// How to implement this?
}
alert(doSomething());
JSFiddle link
请注意,我不需要提醒日志 - 这只是一个简单的测试功能的例子。
Note that I do not need to alert the log - this is just a simple example of testing the functionality. I'll have to do some operations on the log's content.
推荐答案
您可以覆盖 console.log
方法使用它之前:
You could overwrite console.log
method before using it:
var logBackup = console.log;
var logMessages = [];
console.log = function() {
logMessages.push.apply(logMessages, arguments);
logBackup.apply(console, arguments);
};
使用 apply
和 arguments
保留正确的 console.log
行为,即可以通过单个调用添加多个日志消息。
Using apply
and arguments
preserves the correct console.log
behaviour, i.e. you can add multiple log messages with a single call.
它会将所有新 console.log
消息推送到 logMessages
数组。
It will push all new console.log
messages to logMessages
array.
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