Comparison of the = and = operators in JS

Source: Internet
Author: User

=== OPERATOR:
If the two values have different types, false is returned.
Returns true if both values are of the number type and the values are the same.
Returns true if both values are stirng and the values have the same String content.
Returns true if both values are true or false.
Returns true if both values point to the same Object, Arraya, or function.
Returns true if both values are null or undefined.
= Operator:
If the two values have the same type, the = comparison is performed, and the = comparison value is returned.
If the two values do not have the same type, true may be returned.
Returns true if one value is null and the other value is undefined.
If one value is string and the other is number, the string is converted to number before comparison.
If a value is true, it is converted to 1 and then compared, and false is converted to 0.
If one value is an Object and the other value is a number or string, the Object is converted to the original type using valueOf () or toString () and then compared.

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.