Javascript 如果未定义，则 js 覆盖 console.log
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js override console.log if not defined
提问by Radu Maris
Which solution do you recommend, the second is simpler ( less code ), but there are drawbacks on using it ?
您推荐哪种解决方案，第二种更简单（更少的代码），但使用它有缺点吗？
First:(Set a global debug flag)
第一：（设置全局调试标志）
// the first line of code
var debug = true;
try {
console.log
} catch(e) {
if(e) {
debug=false;
}
};
// Then later in the code
if(debug) {
console.log(something);
}
Second:override console.log
第二：覆盖console.log
try {
console.log
} catch(e) {
if (e) {
console.log = function() {}
}
};
// And all you need to do in the code is
console.log(something);
回答by Andy E
Neither, but a variation of the second. Lose the try...catchand check for existence of the console object properly:
两者都不是，而是第二种的变体。丢失try...catch并正确检查控制台对象是否存在：
if (typeof console == "undefined") {
window.console = {
log: function () {}
};
}
console.log("whatever");
回答by Jameson Quinn
Or, in coffeescript:
或者，在咖啡脚本中：
window.console ?=
log:-> #patch so console.log() never causes error even in IE.
回答by Frankie
EDIT:Andy's answeris way more elegant than the quick hack I've posted below.
编辑：安迪的回答比我在下面发布的快速黑客更优雅。
I generally use this approach...
我一般用这种方法...
// prevent console errors on browsers without firebug
if (!window.console) {
window.console = {};
window.console.log = function(){};
}
回答by Suresh
I've faced a similar bug in my past, and I overcame it with the code below:
我过去遇到过类似的错误，我用下面的代码克服了它：
if(!window.console) {
var console = {
log : function(){},
warn : function(){},
error : function(){},
time : function(){},
timeEnd : function(){}
}
}
回答by David
I came across this post, which is similar to the other answers:
我遇到了这篇文章，与其他答案类似：
http://jennyandlih.com/resolved-logging-firebug-console-breaks-ie
http://jennyandlih.com/resolved-logging-firebug-console-breaks-ie
回答by Mike Kormendy
The following will achieve what you are looking for:
以下将实现您正在寻找的内容：
window.console && console.log('foo');
回答by Sean
window.console = window.console || {};
window.console.log = window.console.log || function() {};
