jQuery form plugin jquery.form.js-JS Tutorial-php.cn

jQuery form plugin jquery.form.js

jQuery Form plug-in is an excellent Ajax form plug-in that can easily and non-invasively upgrade HTML forms to support Ajax. jQuery Form has two core methods - ajaxForm() and ajaxSubmit(), which combine functionality from controlling form elements to deciding how to manage the submission process. In addition, the plug-in also includes other methods: formToArray(), formSerialize(), fieldSerialize(), fieldValue(), clearForm(), clearFields() and resetForm(), etc.

Download address:http://malsup.com/jquery/form/#download

Core method-- ajaxForm( ) and ajaxSubmit()

$('#myForm').ajaxForm(function() { $('#output1').html("提交成功！欢迎下次再来！").show(); }); $('#myForm2').submit(function() { $(this).ajaxSubmit(function() { $('#output2').html("提交成功！欢迎下次再来！").show(); }); return false; //阻止表单默认提交 });

Copy after login

Through the two core methods of the Form plug-in, you can easily upgrade the form submission method to the Ajax submission method without modifying the HTML code structure of the form.

ajaxForm() and ajaxSubmit() both accept 0 or 1 parameter. When it is a single parameter, the parameter can be either a callback function or an options object. The above example is a callback Function, the options object is introduced below, so that they have more control over the form

var options = { target: '#output', //把服务器返回的内容放入id为output的元素中 beforeSubmit: showRequest, //提交前的回调函数 success: showResponse, //提交后的回调函数 //url: url, //默认是form的action， 如果申明，则会覆盖 //type: type, //默认是form的method（get or post），如果申明，则会覆盖 //dataType: null, //html(默认), xml, script, json...接受服务端返回的类型 //clearForm: true, //成功提交后，清除所有表单元素的值 //resetForm: true, //成功提交后，重置所有表单元素的值 timeout: 3000 //限制请求的时间，当请求大于3秒后，跳出请求 } function showRequest(formData, jqForm, options){ //formData: 数组对象，提交表单时，Form插件会以Ajax方式自动提交这些数据，格式如：[{name:user,value:val },{name:pwd,value:pwd}] //jqForm: jQuery对象，封装了表单的元素 //options: options对象 var queryString = $.param(formData); //name=1&address=2 var formElement = jqForm[0]; //将jqForm转换为DOM对象 var address = formElement.address.value; //访问jqForm的DOM元素 return true; //只要不返回false，表单都会提交,在这里可以对表单元素进行验证 }; function showResponse(responseText, statusText){ //dataType=xml var name = $('name', responseXML).text(); var address = $('address', responseXML).text(); $("#xmlout").html(name + " " + address); //dataType=json $("#jsonout").html(data.name + " " + data.address); }; $("#myForm").ajaxForm(options); $("#myForm2").submit(funtion(){ $(this).ajaxSubmit(options); return false; //阻止表单默认提交 });

Copy after login

Verify before the form is submitted: beforeSubmit will be called before the form is submitted. If beforeSubmit returns false, It will prevent form submission

beforeSubmit: validate function validate(formData, jqForm, options) { //在这里对表单进行验证，如果不符合规则，将返回false来阻止表单提交，直到符合规则为止 //方式一：利用formData参数 for (var i=0; i < formData.length; i++) { if (!formData[i].value) { alert('用户名,地址和自我介绍都不能为空!'); return false; } } //方式二：利用jqForm对象 var form = jqForm[0]; //把表单转化为dom对象 if (!form.name.value || !form.address.value) { alert('用户名和地址不能为空，自我介绍可以为空！'); return false; } //方式三：利用fieldValue()方法，fieldValue 是表单插件的一个方法，它能找出表单中的元素的值，返回一个集合。 var usernameValue = $('input[name=name]').fieldValue(); var addressValue = $('input[name=address]').fieldValue(); if (!usernameValue[0] || !addressValue[0]) { alert('用户名和地址不能为空，自我介绍可以为空！'); return false; } var queryString = $.param(formData); //组装数据 //alert(queryString); //类似 ： name=1&add=2 return true; }

Copy after login