Some lessons from front-end debugging

I've never written a log information code for program debugging (reason: 1. Lazy. 2. Console.log () will not be spelled. 3. Rely on the debug breakpoint), so I developed a low efficiency, has been thought to be able to one step, the result of a flop, affecting the development progress.

Therefore, I want to learn this lesson, the future development must write the log code, can not be too dependent on debug breakpoint debugging.

Where to write the log is as follows:

1. Send data content (parameters).      

suggest JSON data is best to format output

var str = json.stringify (obj, NULL, 2);//The third parameter is a formatted

Console.log (str)

2. Accept the data content (parameters).

Some lessons from front-end debugging