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Editor to share with you how to use javascript to judge whether it is a leap year, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The method of judging whether it is a leap year by javascript: 1, create a js example file; 2, judge whether it is a leap year by "function isLeap (year) {if (year% 4 years) 0 years years 0) | | (year%400==0)) {...}".

This article operating environment: Windows7 system, javascript1.8.5 version, DELL G3 computer

JS judges whether it is a leap year or not

A condition for determining whether it is a leap year (either meets one of them):

1. The year is divisible by 4, but not by 100.

2. The year is divisible by 400

/ / determine whether it is a leap year function isLeap (year) {if ((year%4==0 & & year0 years 0) | | (year%400==0)) {return 1;} return 0;} alert (isLeap (2019)); / / 0alert (isLeap (2020)); / / 1 / / if it is a leap year, return 1, and vice versa return what 0JavaScript can do. It can make web pages interactive, such as responding to user clicks and providing users with a better experience. two。 You can process forms, verify user input, and provide timely feedback to save users time. 3. The page can be created dynamically according to the user's operation. 4 using JavaScript, you can set up some temporary information that cookie stores on the browser.

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