


This is a countdown effect code for sending verification codes by mobile phone based on jquery. It can realize the function of real-time display of seconds countdown and the function of verifying the mobile phone number format. It is a commonly used website registration and sending mobile phone verification. code effects code.
Effect description:
When registering a website and needing to send a verification code to your mobile phone, we often encounter this effect:
First check whether the mobile phone conforms to the format of 11 digits starting with 1;
If it does not match, an error message will be prompted and false will be returned;
Otherwise, it is submitted to the background. After the background confirms the reception, a value is returned, and the send button turns gray and counts down.
Operating effect:
--------------------------------Effect demonstration Source code download--------------------------------
The jQuery implementation of the countdown effect code for mobile phones to send verification codes is as follows
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>jQuery手机发送验证码倒计时代码</title> <link href="css/jb51.css" type="text/css" rel="stylesheet" /> </head> <body> <div class="form"> <div class="div-name"> <label for="name">用户名</label><input type="text" id="name" class="infos" placeholder="请输入用户名" /> </div> <div class="div-phone"> <label for="phone">手机</label><input type="text" id="phone" class="infos" placeholder="请输入手机" /> <a href="javascript:;" class="send1" onclick="sends.send();">发送验证码</a> </div> <div class="div-ranks"> <label for="ranks">验证码</label><input type="text" id="ranks" class="infos" placeholder="请输入验证码" /> </div> <div class="div-conform"> <a href="javascript:;" class="conform" onclick="sends.conform();">提交</a> </div> </div> <script src="js/jquery-1.8.3.min.js"></script> <script> var sends = { checked:1, send:function(){ var numbers = /^1\d{10}$/; var val = $('#phone').val().replace(/\s+/g,""); //获取输入手机号码 if($('.div-phone').find('span').length == 0 && $('.div-phone a').attr('class') == 'send1'){ if(!numbers.test(val) || val.length ==0){ $('.div-phone').append('<span class="error">手机格式错误</span>'); return false; } } if(numbers.test(val)){ var time = 30; $('.div-phone span').remove(); function timeCountDown(){ if(time==0){ clearInterval(timer); $('.div-phone a').addClass('send1').removeClass('send0').html("发送验证码"); sends.checked = 1; return true; } $('.div-phone a').html(time+"S后再次发送"); time--; return false; sends.checked = 0; } $('.div-phone a').addClass('send0').removeClass('send1'); timeCountDown(); var timer = setInterval(timeCountDown,1000); } } } </script> </body> </html>
The above is the countdown effect code for mobile phone sending verification code implemented by jquery to share with you. I hope you can like it.

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。


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