How to determine if an array is empty in jquery?

Jquery method to determine whether an array is empty: first use the length attribute to get the number of elements in the array object, and then determine whether the number of elements obtained is equal to 0. If it is equal to 0, the array is empty, otherwise it is not empty. ;Syntax "if (array object.length === 0) {//array is empty}".

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jquery method to determine whether an array is empty

var arr = [ "xml", "html", "css", "js" ]; 
if(arr.length == 0){
　　console.log("数组为空");
}else{
	console.log("数组不为空");
}

Output

jQuery length property

The length property contains the number of elements in the jQuery object

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