How to determine if a value is in an array in jquery

Jquery method to determine whether the value is in the array: You can use the [$.inArray("Element (string)", array name)] method to determine. When the element exists, return the element in the array If the subscript in does not exist, [-1] will be returned.

The operating environment of this tutorial: windows10 system, jquery3.2.1 version. This method is suitable for all brands of computers.

(Learning video sharing: javascript video tutorial)

Jquery method to determine whether a value is in an array:

Thinking :

Traverse the entire array and then determine whether it is equal.

Methods provided by Jquery:

$.inArray("元素(字符串)",数组名称)

When the element (string) exists, return the subscript of the element in the array, and return -1 when it does not exist.

$(function () {
          var array = ["asp.net", "asp.net mvc", "html5", "css3", "jquery", "JavaScript"];
             var index = $.inArray("asp.net mvc", array);   //结果：index=1
            if (index >= 0) {
                console.log("数组array包含asp.net mvc下标为：" + index);
           } else {
                console.log("数组array 不包含asp.net mvc下标为：" + index);
           }
      });

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