javascript 调试

javascript 调试

Every so often I want to view what an object looks like at various points of an execution cycle.  Many people like to use breakpoint debugging but I find it a bit annoying and tedious -- it's simply not for me.  The problem comes when I log an object to the console; since other operations may have occurred between my log call and the rest of execution, I may not be seeing a true representation of the object at that moment within the console.  There are a few solutions you can employ:

我经常想查看对象在执行周期的各个阶段的外观。 许多人喜欢使用断点调试，但是我发现它有点烦人和乏味-根本不适合我。 当我将对象记录到控制台时，问题就来了。 由于在我的日志调用与执行的其余部分之间可能发生了其他操作，所以那时我可能无法在控制台中看到该对象的真实表示。 您可以采用几种解决方案：

The first solution is converting the object to a JSON string to browse its contents:

第一种解决方案是将对象转换为JSON字符串以浏览其内容：

// Log the JSON representation of this object // at *this* moment console.log(JSON.stringify(myObject));

Now I can see every key and value of the object without needing to click around it.  If you prefer to work with a real object in the debugger, simply convert the JSON object from string to an object again, effectively cloning it:

现在，我可以看到对象的每个键和值，而无需单击它。 如果您希望在调试器中使用真实的对象，只需将JSON对象从字符串再次转换为对象，即可有效地将其克隆：

// Object -> String -> Object (clone) console.log(JSON.parse(JSON.stringify(myObject)));

Of coures this isn't a perfect solution for some people but it has worked beautifully for me in the past.  Maybe I'm a lesser programmer for not liking breakpoint debugging but hey -- I tend to get things done!

当然，对于某些人来说，这不是一个完美的解决方案，但过去对我来说效果很好。 也许我是一个不太喜欢断点调试的程序员，但嘿-我倾向于把事情做好！

翻译自: https://davidwalsh.name/javascript-debugging-tip-objects

javascript 调试