How to determine whether an element is an array element in jquery

Jquery method to determine whether an element is an array element: Use [$.inArray("Element (string)", array name)] to determine. When the element exists, return the element in the array. Subscript, returns [-1] if it does not exist.

The operating environment of this tutorial: windows7 system, jquery3.2.1 version, Dell G3 computer.

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Jquery method to determine whether it is an array element:

To determine whether the array contains In principle, a certain element is to traverse the entire array and then determine whether it is equal.

You can use the method provided by Jquery:

$.inArray("Element(String )", array name) Make a judgment. When the element (string) exists, return the subscript of the element in the array. If it does not exist, return -1

 $(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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