• day15 js jquery


    文本操作:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>


    </head>
    <body>

    <div class="outer">
        <span class="num">23</span>
    </div>
    <button>click</button>
    <script src="jquery-3.2.1.min.js"></script>
    <script>
        $("button").click(function () {

            var $val=$(".outer .num").html();
            $(".outer .num").html(parseInt($val)+1);

        })
    </script>
    </body>
    </html>

    属性操作:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <script src="jquery-3.2.1.min.js"></script>
        <style>
            #i3{
                color: green;
            }
        </style>
    </head>
    <body>


    <p class="c1 c2" id="i1" egon="9000">this is P</p>
    <p id="i3">this is P</p>

    <input type="checkbox" >

    <script>
        // 取某一个属性的值
        $(".c1").attr("id");
        $(".c1").attr("egon");

        // 赋值操作
         $(".c1").attr("id","i2");
         $(".c1").attr("egon",9999);
       // css的样式操作
       $("#i3").click(function () {
           // $(this).css("color","red");
           $(this).css({"color":"red","fontSize":"32px"})
       })

    </script>
    </body>
    </html>

     

    Iquery操作:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>

    </head>
    <body>

    <div class="outer">
        <p>111</p>
        <p>222</p>
        <p>333</p>
    </div>


       <script src="jquery-3.2.1.min.js"></script>
        <script>

            // jquery两种循环方式
            // 方式1:$.each(循环对象,function(){
            //     console.log("OK")
            // });

            // var arr=[111,222,333];
            //
            // var info={"name":"egon","age":9000};
            //
            // $.each(info,function (i,j) {
            //    console.log(i); // 下标
            //    console.log(j); // 下标 对应的值
            // })

            // 方式2:
            $(".outer p").each(function () {
                console.log($(this).html())  // $(this)指的是每一次循环的对象
            })




        </script>
    </body>
    </html>

     

    表格操作:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>

    <button class="select_all">全选</button>
    <button class="cancel">取消</button>
    <button class="reverse">反选</button>
    <hr>
    <table border="1">
        <tr>
            <td><input type="checkbox"></td>
            <td>张三</td>
            <td>23</td>
            <td>s5</td>
        </tr>
            <tr>
            <td><input type="checkbox"></td>
            <td>李四</td>
            <td>23</td>
            <td>s5</td>
        </tr>
            <tr>
            <td><input type="checkbox"></td>
            <td>王五</td>
            <td>23</td>
            <td>s8</td>
        </tr>
    </table>


    <script src="jquery-3.2.1.min.js"></script>

    <script>
        
        // 全选事件
        $(".select_all").click(function () {
            //  方式1:
            // $(":checkbox").each(function () {
            //     $(this).prop("checked",true)
            // })

            // 方式2
            $(":checkbox").prop("checked",true)

        });

        // 取消事件
        $(".cancel").click(function () {

             $(":checkbox").prop("checked",false)
        });
        
        // 反选事件
        
        $(".reverse").click(function () {
            $(":checkbox").each(function () {

               // if($(this).prop("checked")){
               //     $(this).prop("checked",false)
               // }
               // else {
               //      $(this).prop("checked",true)
               // }

                // 方式2:
                $(this).prop("checked",!$(this).prop("checked"))

            })
        })
    </script>
    </body>
    </html>

     

    事件绑定:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>


    <ul>
        <li>111</li>
        <li>222</li>
        <li>333</li>
    </ul>
    <button>Add</button>
    <script src="jquery-3.2.1.min.js"></script>

    <script>
         // li的弹出文本事件
        // $("ul li").click(function () {
        //     alert($(this).html())
        // });

        // $("ul li").on("click",function () {
        //      alert($(this).html())
        // });

         // 事件委派

         $("ul").on("click","li",function () {
             alert($(this).html())
         });

        // button的追加子元素吧事件
        $("button").click(function () {

            $("ul").append("<li>444</li>")
        })
    </script>
    </body>
    </html>

     

    节点操作:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            .outer{
                width: 400px;
                height: 300px;
                background-color: darkgrey;
            }
        </style>
        <script src="jquery-3.2.1.min.js"></script>
    </head>
    <body>

    <div class="outer">

        <h4>hello world</h4>
        <p>123</p>
        <p>456</p>
        <p>789</p>

    </div>

    <hr>
    <button class="add">Add</button>
    <button class="del">删除</button>
    <button class="set">替换</button>

    <script>

         // 添加节点操作
        $(".add").click(function () {
            // 创建一个img标签对象

            var $img=$("<img>");    //   <img>
            $img.attr("src","egg.jpg");

            console.log($img[0]);

            // 添加到指定节点中: $(父标签).append(添加的子标签)

           // $(".outer").append($img);
           // $img.appendTo(".outer")
            $(".outer").after($img)

        });

        // 删除节点操作
        $(".del").click(function () {
            $(".outer").remove()
            //$(".outer").empty()     // empty 清空
        });

        // 替换节点
        $(".set").click(function () {
            var $img=$("<img>");    //   <img>
            $img.attr("src","egg.jpg");
            $(".outer p").eq(1).replaceWith($img)

        });

        // 拷贝节点
        var $copy=$(".outer").clone();
        console.log($copy[0])


    </script>
    </body>
    </html>

     

    Clone实例:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <script src="jquery-3.2.1.min.js"></script>
    </head>
    <body>


    <div class="style_box">
        <div class="item">
            <button class="add">+</button><input type="text">
        </div>

    </div>

    <script>
        //  添加事件
        $(".item .add").click(function () {

            var $clone=$(this).parent().clone();
            $clone.children(".add").html("-").attr("class","del");

            $(".style_box").append($clone);

        });

        // 删除事件(事件委派)

        $(".style_box").on("click",".del",function () {

            console.log($(this));

            $(this).parent().remove()
        })
    </script>
    </body>
    </html>

     

    表格的增删改操作:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
              *{
                margin: 0;
            }
            .shade{
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: gray;
                opacity: 0.6;
            }

            .model{
                position: fixed;
                left:200px;
                top: 100px;
                width: 600px;
                height: 300px;
                background-color: white;
            }

            .hide{
                display: none;
            }
        </style>
    </head>
    <body>

    <button class="addBtn">添加</button>
    <table border="1">
         <thead>
               <tr>
            <th>姓名</th>
            <th>年龄</th>
            <th>班级</th>
            <th>操作</th>
        </tr>
         </thead>

        <tbody id="tbody">
             <tr>
            <td>小高</td>
            <td>23</td>
            <td>s19</td>
            <td>
                <button class="del">删除</button>
                 <button class="del">编辑</button>
            </td>
        </tr>
             <tr>
                <td>小李</td>
                <td>23</td>
                <td class="active">s18</td>
                <td><button class="del">删除</button>
                    <button class="del">编辑</button>
                </td>
             </tr>
             <tr>
                <td>小贾</td>
                <td>28</td>
                <td>s19</td>
                <td>
                    <button class="del">删除</button>
                    <button class="del">编辑</button>
                </td>
             </tr>
        </tbody>

    </table>

    <div class="shade hide"></div>

    <div class="model hide">
        <h3>添加学生信息:</h3>
        <form action="">
            <p>姓名 <input type="text" class="item"></p>
            <p>年龄 <input type="text" class="item"></p>
            <p>班级 <input type="text" class="item"></p>
            <input type="button" value="submit" id="subBtn">
        </form>
    </div>



    <script src="jquery-3.2.1.min.js"></script>
    <script>

        // 删除事件
       $(".del").click(function () {
           console.log($(this));
           $(this).parent().parent().remove()
       });

        //  添加事件
        $(".addBtn").click(function () {
              $(".shade").show();
              $(".model").show()
        });

        //  $("#subBtn").click(function () {
        //      // 关闭对话框
        //      $(".shade").hide();
        //      $(".model").hide();
        //      // 获取用户输入值
        //      var arr=[];
        //      var $tr=$("<tr>");
        //      $(".item").each(function () {
        //          console.log($(this));
        //          arr.push($(this).val());
        //
        //          $td=$("<td>");  // <td></td>
        //          $td.html($(this).val());
        //          $tr.append($td)
        //      });
        //      $tr.append('<td><button class="del">删除</button></td>');
        //      console.log($tr[0]);
        //
        //      // 构建tr标签
        //
        //      $("#tbody").append($tr)
        //
        //
        //
        //
        //
        // })


         $("#subBtn").click(function () {
             // 关闭对话框
             $(".shade").hide();
             $(".model").hide();
             // 获取用户输入值
             var arr=[];

             $(".item").each(function () {
                 console.log($(this));
                 arr.push($(this).val());

             });
             console.log(arr);

             // 构建tr标签
             s='<tr><td>'+arr[0]+'</td><td>'+arr[1]+'</td><td>'+arr[2]+'</td><td><button class="del">删除</button></td></tr>'
             $("#tbody").append(s)





        })
    </script>
    </body>
    </html>

     

    动画效果1:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>


    </head>
    <body>

    <div class="c1">DIV</div>
    <button class="xianshi">显示</button>
    <button class="yincang">隐藏</button>
    <button class="qiehuan">切换</button>
    <script src="jquery-3.2.1.min.js"></script>

    <script>
        $(".xianshi").click(function () {
            // $(".c1").removeClass("hide")
           $(".c1").show(1000);

        });

         $(".yincang").click(function () {

             $(".c1").hide(1000);
        });

           $(".qiehuan").click(function () {

             $(".c1").toggle(1000)
        });
    </script>
    </body>
    </html>

     

    动画效果2:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>


    </head>
    <body>

    <div class="c1">
        <div class="title">菜单1</div>
        <div class="con">
            <p>111</p>
            <p>111</p>
            <p>111</p>
        </div>
    </div>
    <hr>
    <button class="xianshi">显示</button>
    <button class="yincang">隐藏</button>
    <button class="qiehuan">切换</button>
    <script src="jquery-3.2.1.min.js"></script>

    <script>
        $(".xianshi").click(function () {

           $(".con").slideDown(2000)

        });

         $(".yincang").click(function () {
           $(".con").slideUp(2000)
        });

          $(".qiehuan").click(function () {
           $(".con").slideToggle(1000)
        });
    </script>
    </body>
    </html>

    动画效果3:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>

        <style>
            .c1{
                width: 200px;
                height: 200px;
                background-color: green;
            }
        </style>
    </head>
    <body>

    <div class="c1"></div>

    <hr>
    <button class="xianshi">显示</button>
    <button class="yincang">隐藏</button>
    <button class="qiehuan">切换</button>
    <script src="jquery-3.2.1.min.js"></script>

    <script>
        $(".xianshi").click(function () {

           $(".c1").fadeIn(2000)

        });

         $(".yincang").click(function () {
           $(".c1").fadeOut(2000)
        });

          $(".qiehuan").click(function () {
          // $(".c1").fadeToggle(2000)
          // $(".c1").fadeTo(2000,0.2)
        });
    </script>
    </body>
    </html>

     

     

    Offset偏移量:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            *{
                margin: 0;
            }
            .c1,.c2{
                width: 200px;
                height: 200px;
            }
            .c1{
                background-color: darkgrey;
            }
            .c2{
                background-color: cadetblue;
            }
            .c3{
                position: relative;
            }

        </style>
    </head>
    <body>

    <div class="c1"></div>
    <div class="c3"><div class="c2"></div></div>

    <script src="jquery-3.2.1.min.js"></script>
    <script>
        // 获取偏移量
        // console.log($(".c1").offset().left);
        // console.log($(".c1").offset().top);
        console.log($(".c2").offset().left);
        console.log($(".c2").offset().top);


        console.log($(".c2").position().left);
        console.log($(".c2").position().top);   // 不可以设置

        // 设置偏移量
        //$(".c2").offset({top:200,left:200})

    </script>
    </body>
    </html>

     

     

    返回顶部:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>


        <style>
            *{
                margin: 0;
            }
            .c1{
                width: 100%;
                height: 2000px;
                background-color: darkgrey;

            }

            .returnTop{
                width: 100px;
                height: 46px;
                background-color: darkcyan;
                color: white;
                text-align: center;
                line-height: 46px;
                position: fixed;
                bottom: 20px;
                right: 20px;
                    }


            .hide{
                display: none;
            }
        </style>
    </head>
    <body>

    <div class="c1">
        <h1>yuan</h1>
    </div>

    <div class="returnTop hide">返回顶部</div>


    <script src="jquery-3.2.1.min.js"></script>
    <script>
        // 返回顶部事件
        $(".returnTop").click(function () {

          $(window).scrollTop(0)

        });

        // 监听滚动条的位置

        $(window).scroll(function () {

           console.log($(window).scrollTop());
            var $current_position=$(window).scrollTop()

            if($current_position>200){

               $(".returnTop").show()
            }
            else {
                 $(".returnTop").hide()
            }
        })





    </script>
    </body>
    </html>

     

    模态对话框:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>

        <style>
            .backend{
                width:100%;
                height: 2000px;
                background-color: lightblue;
            }
            *{
                margin: 0;
            }
            .shade{
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background-color: gray;
                opacity: 0.6;
            }

            .model{
                position: fixed;
                left:200px;
                top: 100px;
                width: 600px;
                height: 300px;
                background-color: white;
            }

            .hide{
                display: none;
            }
        </style>
    </head>
    <body>


    <div class="backend">
     <button>注册</button>
    </div>

    <div class="shade hide"></div>

    <div class="model hide">
        <h3>添加学生信息:</h3>
        <form action="">
            <p>姓名 <input type="text"></p>
            <p>年龄 <input type="text"></p>
            <p>班级 <input type="text"></p>
            <input type="button" value="submit" id="subBtn">
        </form>
    </div>


    <script src="jquery-3.2.1.min.js"></script>

    <script>
        $("button").click(function () {
            $(".shade").show();
            $(".model").show()
        });

        $("#subBtn").click(function () {
             $(".shade").hide();
             $(".model").hide()
        })


    </script>
    </body>
    </html>

     

     

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  • 原文地址:https://www.cnblogs.com/huangtiandi001/p/8213916.html
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