jQuery遍歷的幾種方式

一、jQuery對象遍歷

    <script type="text/javascript" src="js/jquery-3.4.1.js"></script>
    <script>
        var cities = ["深圳市","廣州市","珠海市","上海市","北京市"];
        //jQuery對象調用遍歷
        $(cities).each(function(i,n) {
            console.log(i+" = "+n);
        });
    </script>

二、jQuery函數調用

<script>
    //jQuery函數調用
    $.each(cities,function(i,n) {
        console.log(i+" > "+n);
    });
</script>

三、純JavaScript實現

<script>
        var cities = ["深圳市","廣州市","珠海市","上海市","北京市"]
        
        function callback(i,n) {
            console.log("123：" + i + n);
        }

        function foreach(array,callback) {
            for (var i = 0; i < array.length; i++) {
                var item = array[i];
                callback(i,item);
            }
        }
        //調用
        foreach(cities,callback);
</script>

　　效果

 

　　參考鏈接：https://blog.csdn.net/Woo_home/article/details/91375539