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This article is about how JavaScript uses the isEmpty function. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

IsEmpty: check whether value is empty

If it is null, directly return true;. If it is a class array, determine the length of the data; if it is an Object object, determine whether it has attributes; if it is other data, directly return false (you can also return true instead)

Function isEmpty (value) {if (value = = null) {return true;} if (isArrayLike (value)) {return! value.length;} else if (isPlainObject (value)) {for (let key in value) {if (hasOwnProperty.call (value, key)) {return false;}} return false } Thank you for reading! This is the end of the article on "how to use the isEmpty function in JavaScript". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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