How jquery determines whether it is an array

Jquery method to determine whether it is an array: Use the isArray method to determine whether a variable is an array type. The return value is a Boolean type, and the code is [var bool1 = $.isArray(obj)].

Recommendation: "jquery video tutorial"

Jquery method to determine whether it is an array:

jquery provides the isArray method to determine whether a variable is an array type, and the return value is Boolean type.

Example:

var obj = {a:1};
var arr = [1, 2];
var bool1 = $.isArray(obj); 
var bool2 = $.isArray(arr);
console.log(bool1); //false
console.log(bool2); //true

Native js method to determine whether it is an array:

[] instanceof Array  // true
[].constructor == Array  // true
Object.prototype.toString.call([]) == '[object Array]'  // true

Related free learning recommendations: JavaScript (video)

The above is the detailed content of How jquery determines whether it is an array. For more information, please follow other related articles on the PHP Chinese website!