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

Source: Internet
Author: User

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 ));
}
};

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.