The console. warn method in node. js is used in node. js scenarios.

The console. warn method in node. js is used in node. js scenarios.

Method description:

This method is the same as console. error. You can see the source code. The console. error is actually directly called by console. warn.

Syntax:

Copy codeThe Code is as follows:
Console. warn ([data], [...])

Receiving parameters:

Console. log accepts several parameters. If there is only one parameter, the string format of this parameter is output.

If multiple parameters exist, they are output in a format similar to the C language printf () command.

If no parameter exists, only one line break is printed.

Example:

Copy codeThe Code is as follows:
Var count = 1234;
Console. error ('count: % d', count );

Source code:

Copy codeThe Code is as follows:
Console. prototype. warn = function (){
This. _ stderr. write (util. format. apply (this, arguments) + '\ n ');
};