JavaScript implicit type conversion steps and javascript steps

JavaScript implicit type conversion steps and javascript steps

Here, implicit type conversion is a conversion caused by =.

1. If NaN exists, false is returned.
2. If there is a Boolean, the Boolean is converted to a number.
3. Check whether there are any strings. In three cases, the opposite party is an object and the object is converted using toString. The other party is a number and the string is converted to a number. The other party is a string and can be directly compared. Otherwise, false is returned.
4. If it is a number, the other party is an object, and the object is compared with valueOf, all others will return false
5. Null, undefined does not perform type conversion, but they are equal

This order must be memorized, which is frequently asked during interviews.

The following are some miscellaneous questions.

0 = undefined1 = true2 = {valueOf: function () {return 2} NaN = NaN 8 = undefined1 = undefined null = {toString: function () {return 2} 0 = null = 1 {toString: function () {return 1}, valueOf: function () {return [] }== 1

Summary

The above section describes the JavaScript implicit type conversion procedure. I hope it will help you. If you have any questions, please leave a message and I will reply to you in a timely manner. Thank you very much for your support for the help House website!