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

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

Method description:

This method is the same as assert. OK. If the expression evaluates to false, an AssertionError will be thrown along with the message)

Syntax:

Copy codeThe Code is as follows:
Console. assert (expression, [message])

Receiving parameters:

Expression

Message error message

Example:

Copy codeThe Code is as follows:
Var a = 0;
Console. assert (a = 1, 'error! ');

Source code:

Copy codeThe Code is as follows:
Console. prototype. assert = function (expression ){
If (! Expression ){
Var arr = Array. prototype. slice. call (arguments, 1 );
Require ('assert '). OK (false, util. format. apply (this, arr ));
}
};