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JS/Jquery第课 定义对象和定时器发送验证码
孤忆寻昔R
Original
802 people have browsed it
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <title>js 对象</title>
  6. </head>
  7. <body>
  9. <button id="btn" onclick="seng()">放松验证码</button>
  10. <script type="text/javascript">
  13.     // 定义对象 有两种 new 动态加属性 ，直接赋值给变量
  14.    /* var obj = new Object();
  15.     obj.name = 'emagic';
  16.     obj.age = '20';
  18.     obj.spek = function(){
  19.         console.log('我会看车');
  20.     };
  21.     //调用对象
  22.     obj.spek();*/
  24.    // 定义对象函数
  25.     /*function spek()
  26.     {
  27.         console.log('看车');
  28.     }
  29.     spek()*/;
  31.     // 直接赋值给对象
  32.     // var obj = {age:'50',name:'张三'};
  33.     // obj.addr = "shena shen";
  35.     // 第二种调用方式
  36.    /* var obj = {age:'50',name:'张三'};
  37.     obj.add = "ks shen";
  38.     obj.spek = function(){
  39.         console.log('我会说话了');
  40.     };
  41.     obj.spek();*/
  43. /*// 第二种定义对象
  44.     var obj = {
  45.         name:'emagic',
  46.         age:20,
  47.         spek:function(){
  48.           console.log('开测');
  49.         },
  50.     };
  51.     obj.spek();*/
  53.     /*// 对象传参
  54.     var obj={
  55.         name: '校长三',
  56.         age: 20,
  57.         keps:function(kes){
  58.             console.log('开测'+kes);
  59.         },
  60.     };
  61.     obj.keps('这是对象穿三');*/
  64.     // 第二种动态定义加参数
  65.     /*var obj = {
  66.         name:"肇庆",
  67.         age: 20,
  69.         keop:function(ks){
  70.             console.log('连接传参['+ks+']');
  71.         },
  72.     };
  73.     obj.keop('hello word');*/
  75.     // 定义多个方法
  76.     /*var obj = {
  77.         name:"张三",
  78.         age: 30,
  79.         kew:function (word){
  80.             console.log('这是我的世界【'+word+'】');
  81.         },
  82.         kews:function(hello){
  83.             console.log('你好世界'+hello);
  84.         },
  86.     };
  87.     obj.kews("开始我的故事");
  88.     obj.kew('创建世界');*/
  90.     // 闭包 用的少
  91.     /*function skep(){
  92.         var name ='看了';
  93.         var age=20;
  94.         function bbb()
  95.         {
  96.             console.log('my name is aaa');
  97.         }
  98.         bbb();
  99.     };
  100.     skep();*/
  102.     //方法调用方法 keps2调用keps
  103.     /*var obj = {
  104.         name: "张三",
  105.         age: 18,
  106.         keps: function(str,it){
  107.             console.log('第一个'+str);
  108.             console.log('第二个'+it);
  109.         },
  110.         keps2:function(){
  111.             this.keps('keps2调用了keps','aaaa');
  112.         }
  113.     };
  114.     obj.keps2();
  115. */
  116.     // console.log(obj);
  118.     // js定时器
  119.   /*  setTimeout(function(){
  120.         console.log('页面加载完毕');
  121.     },2000);
  123.     // 匿名函数
  124.     function kes(){
  125.         console.log('my name is aa ');
  126.     }
  128.     // 调用方法时可以直接调用方法 不要加()
  129.     setTimeout(kes,2000);
  130. */
  132.     // setInterval设置时间段
  133.  /* function tis()
  134.     {
  135.         console.log('my name is a');
  136.     }
  137.     var kess = setInterval(function (){
  138.         console.log('this is setInterval');
  139.         clearInterval(kess);
  140.     },1000)*/;
  141.     /* function tis()
  142.         {
  143.             console.log('my name is a');
  144.         }
  145.         var kess = setInterval(function (){
  146.             console.log('this is setInterval');
  147.             clearInterval(kess);
  148.         },1000)*/
  149.   // 设置定时13-14发布时间段
  151.    /*var time = 24;
  152.     var kers = setInterval(function(){
  153.         if(time<13){
  154.             return;
  155.         }
  156.         console.log('this is setInterval()');
  157.         if(time>14){
  158.             clearInterval(kers);
  159.         }
  160.     },1000);*/
  162.     /*var flag = 0;
  163.     var kowsd = setInterval(function(){
  164.         console.log('this is setInterval()');
  165.     },3000);*/
  167.     // 发送验证码定时器
  168.     function seng(){
  169.         var flag = 60;
  170.         var txt = document.getElementById('btn').textContent;
  171.         var timer = setInterval(function(){
  172.             document.getElementById('btn').textContent = flag +'秒后重试';
  173.             flag--;
  174.             if(flag ==0){
  175.                 document.getElementById('btn').textContent = txt;
  176.                 clearInterval(timer);
  177.             }
  178.         },1000);
  179.     }
  181. </script>
  184. </body>
  185. </html>

总结

1、clearInterval设置预定义时间，出现一次继续往下执行
2、document.getElementById

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