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Commonly used form code sharing in JavaScript (Collection)

黄舟Original: 2017-07-24 10:12:422231browse

Mobile phone (text box):

<input type="text" name="" maxlength="11" placeholder="" autocomplete="off">

Basic form validation　

<script>$(function(){
    $(&#39;.fr-form&#39;).submit(function(event){
        event.preventDefault();//阻止表单提交事件        
        $(this).find(&#39;.error-tip&#39;).html(&#39;&#39;);        
        var name = $(&#39;.username&#39;);        
        var mobile = $(&#39;.mobile&#39;);        
        var regTest = /^1[3|4|5|7|8][0-9]{1}[0-9]{8}$|15[0-9]{1}[0-9]{8}$|18[0-9]{1}[0-9]{8}$/;        
        if(!name.val().length || name.val() == name.attr(&#39;data-value&#39;) ){alert(&#39;请填写姓名&#39;);return false;}        
        if(!mobile.val().length || mobile.val() == mobile.attr(&#39;data-value&#39;) ){alert(&#39;请填写电话&#39;);return false;}        
        if(!regTest.test( mobile.val() )){alert(&#39;电话格式不对&#39;);return false;}
        $.ajax({
            url:&#39;/signup&#39;,
            type:&#39;POST&#39;,
            data:&#39;realname=&#39;+name+&#39;&mobile=&#39;+mobile+&#39;&source=39&#39;,
            dataType:&#39;json&#39;,
            success:function(data){                if(data.status == 1){
                    alert(data.msg);
                }else{
                    alert(&#39;提交成功&#39;);
                }
            }
        })        return false;
    });
});
</script>
<form method="post" action="" class="fr-form">
<input type="text" class="input username" data-value="您的称呼" value="">
<input type="text" class="input mobile" data-value="您的电话" value="">
<p class="error-tip"></p><input type="submit" class="frformbtn" value="免费申请">
</form>

checkbox (checkbox) value

<script src=" 
</script>
<script type="text/javascript">$(function(){
    $("#form").submit(function(){//表单提交:复选框取值
        //var checkboxs = $(&#39;input[type="checkbox"]:checked&#39;);
        var checkboxs = $(&#39;input[type="checkbox"][name="test"]:checked&#39;);        
        var checkboxs = $(&#39;input:checkbox[name="test"]:checked&#39;);
        console.log("长度: "+checkboxs.length);
        checkboxs.each(function(){            
        var s=$(this).val();
            console.log(s);
        });
        console.log("------------");        
        var checkboxs=$(&#39;input:checkbox[name="test"]:checked&#39;);        
        for(i=0;i<checkboxs.length;i++){
            console.log( $(checkboxs[i]).val());
        }        return false;
    });
});</script><form method="post" action="" id="form">
    <input type="checkbox" name="test" value="1">
    <input type="checkbox" name="test" value="2">
    <input type="checkbox" name="test" value="3">
    <input type="checkbox" name="test" value="4">
    <input type="checkbox" name="test" value="5">
    <input type="submit">
    <input type="reset"></form>

radio (radio button) value

<script src=" 
</script>
<script type="text/javascript">$(function(){
    $("#form").submit(function(){//表单提交：单选框取值
        var aaa=$(&#39;input:radio[name="aaa"]:checked&#39;).val();
        alert(aaa);        
        return false;
    });
});</script><form method="post" action="" id="form">
    <input type="radio" name="aaa" value="1" checked>
    <input type="radio" name="aaa" value="2">
    <input type="radio" name="aaa" value="3">
    <input type="submit"></form>

checkbox select all (native js)

<script src=" 
</script>
<script type="text/javascript">$(function(){
    $("#check_all").click(function(){            
    var a=$(this)[0].checked;            
    //alert( typeof a);
            var inputs = document.getElementsByTagName("input");            
            for(var i=0; i< inputs.length; i++){                
            if(inputs[i].type == "checkbox"){
                    inputs[i].checked = a; 
                }
            }
    });
});
</script>
<input type="checkbox" name="" id="check_all">选择所有<hr>
<input type="checkbox" name="">
<br>
<input type="checkbox" name="">
<br>
<input type="checkbox" name="">
<br>
<input type="checkbox" name="">
<br>

checkbox Select all (jquery)

<script type="text/javascript" src=" 
</script>
<script type="text/javascript">$(function(){
    $("#check_all").click(function(){        
    if($(this).is(":checked")){
            $("input[name=aa]").prop("checked", true);
        }else{
            $("input[name=aa]").prop("checked", false);
        }
    });
});
</script>
<input type="checkbox" name="" id="check_all">选择所有<hr>
<input type="checkbox" name="aa">
<br>
<input type="checkbox" name="aa">
<br>
<input type="checkbox" name="aa">
<br>
<input type="checkbox" name="aa">
<br>

checkbox Check yourself and Check boxes for all subordinate subdirectories: .prop("checked",true); 　2015-12-1

<script type="text/javascript" src=" 
</script>
<script type="text/javascript">$(function(){
    $("input[type=checkbox]").click(function(){        
    var s=$(this)[0].checked;
        $(this).parent().find("input[type=checkbox]").prop("checked",s);
    });
});</script><ul>
    <li><input type="checkbox" name="">
        <ul>
            <li><input type="checkbox" name=""></li>
            <li><input type="checkbox" name=""></li>

            <li><input type="checkbox" name="">
                <ul>
                    <li><input type="checkbox" name=""></li>
                    <li><input type="checkbox" name=""></li>
                    <li><input type="checkbox" name=""></li>
                </ul>
            </li>
        </ul>
    </li>
    <li><input type="checkbox" name=""></li>
    <li><input type="checkbox" name="">
        <ul>
            <li><input type="checkbox" name=""></li>
            <li><input type="checkbox" name=""></li>
            <li><input type="checkbox" name=""></li>
        </ul>
    </li></ul>

A common effect of the text box:

When it is in the "focus" state, it is dark text. After the mouse is moved away, the text changes to light color.

When the text box is not filled in (or empty), a prompt message is displayed. After it has been filled in, the text color becomes darker and the prompt message is removed.

<script type="text/javascript" src=" 
</script>
<script type="text/javascript">$(function(){
    $(".input").blur(function(){        
    var _defalut = $(this)[0].defaultValue;        
    var _value = $(this).val();        
    if(_value==_defalut || _value ==""){
            $(this).val(_defalut);
            $(this).removeClass("cGray");
        }else{
            $(this).addClass("cGray");
        }
    });
    $(".user-container .input").focus(function(){        
    var _defalut = $(this)[0].defaultValue;        
    var _value = $(this).val();        
    if(_value==_defalut){
            $(this).val("");
        }
    });
});
</script>
<ul>
<li>
<input type="text" name="" class="input" value="手机号码 （填写手机号）">
</li>
<li>
<input type="text" name="" class="input" value="密码 （6-16位数字、字母）">
</li>
</ul>

textarea：

Multi-line text box form validation: 2016-5-3

<script type="text/javascript" src=" 
</script>
<script type="text/javascript">$(function(){    
//表单提交（实际是表单不提交，发ajax）    
$(&#39;.questions-form&#39;).submit(function() {
        event.preventDefault();//阻止表单提交事件
        var _textarea = $(&#39;.questions-form&#39;).find(&#39;textarea&#39;);        
        var _str = $.trim(_textarea.val());        
        var _len = _str.replace(/[^\x00-\xff]/g, &#39;__&#39;).length;        
        if (_textarea.attr(&#39;data-value&#39;) == _str) {alert(&#39;请填写内容&#39;);return false;}        
        if (_len < 10) {alert(&#39;内容过短，长度应在10-500个字之间&#39;);return false;}        
        if (_len > 500) {alert(&#39;内容超长了，长度在10-500个字之间，现在已 &#39; + _len + &#39; 个英文字符长度&#39;);return false;}        
        //ajax..
        return false;
    });
});</script>
<form method="post" class="questions-form">
    <textarea name="" rows="6" cols="50"></textarea>
    <input type="submit" value="提交" class=""></form>

Calculate the character length of the text box (1 Chinese character counts as 2 English characters) 2016-1-15

9dd4e74599c2814fa7e1870628278dc5
8019067d09615e43c7904885b5246f0a$(function(){
    $("#textarea").blur(function(){        
    var strLen = $(this).val().replace(/[^\x00-\xff]/g,'__').length;
        alert(strLen);
    });
});2cacc6d41bbb37262a98f745aa00fbf0
f9b593c2e93d9b585f67a6d67478e8ee
40587128eee8df8f03d0b607fe983014

552ac683c0f554e98a10af6771e392eb The spellcheck attribute is whether to perform spell check (ie incompatible) 2016-6-12

Restrict text box Only numbers are allowed to be entered: 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　utinguishes for 6-6-6

<script type="text/javascript" src=" 
</script>
<script type="text/javascript">$(function(){    
//房屋结构: 室、厅、卫、厨房、阳台(限制只允许输入数字)    
$(".ipt2").keyup(function(){        
var _val = $(this).val();        
//var _val = _val.replace(/[^\-?\d.]/g,&#39;&#39;)    
//限制文本框只能输入正数，负数，小数
        //var _val = _val.replace(/[^\d.]/g,&#39;&#39;)    
         //限制文本框只能输入正数，小数
        var _val = _val.replace(/\D/g,&#39;&#39;)    　　  
        //限制文本框只能输入数字        
        $(this).val(_val);
    });
    </script>
    <input type="text" name="shi" value="2" autocomplete="off" maxlength="10" class="ipt2">

<select>
  <optgroup label="Sirs">
    <option value ="aaa">aaa</option>
    <option value ="bbb">bbb</option>
  </optgroup>

  <optgroup label="Cars">
    <option value ="xxx">xxx</option>
    <option value ="yyy">yyy</option>
  </optgroup></select>

Text box (drop-down prompt):

<input id="myCar" list="cars" /><datalist id="cars">
  <option value="BMW">
  <option value="Ford">
  <option value="Volvo"></datalist>

Text box (double-click Then set the value of placeholder to the current value)

<script type="text/javascript" src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js"></script><script type="text/javascript">$(function(){
    $("input[type=text]").dblclick(function(){    /*双击后将placeholder的值设为当前值*/
        if( $(this).val().length==0){
            $(this).val($(this).attr(&#39;placeholder&#39;));
        }
    });
});</script><input type="text" value="" placeholder="hidden">

confirm:

<script type="text/javascript">$(function(){
    $("#list_form").submit(function(){//表单提交:
        if ( confirm("确定删除已选中的信息吗？") ){            
        return true;
        }else{            return false;
        }
    });
});</script>

Serialized form value:

　2016-4-13

<script type="text/javascript">$(function(){
    $("form").submit(function(){
        event.preventDefault();//阻止表单提交事件
        var s=$(&#39;form&#39;).serialize();//序列化表单值        alert(s);
    });
});</script><form method="post" action="">
    <input type="text" name="uname" value="aaa">
    <input type="text" name="city" value="beijing">
    <input type="submit" value="" class=""></form>

JSON object 7e86220f02db10634a6a67f8dcda189d JSON string, mutual conversion:

Note: ie8 (compatibility mode), ie7 and ie6 do not have JSON objects. It is recommended to use the official JSON method and introduce json.js .

var s1={a:1,b:2,c:333}var s2=JSON.stringify(s1);　　　　
//将json对象转为字符串var s3=JSON.parse(s2);　　　　　　
//将json字符串转为json对象

Upload button (change traditional appearance) [Important]

　2016-6-3 changes

<!-- 上传按钮（改变传统上传按钮外观） -->
<style type="text/css">
.filebtn-box {position:relative;width:120px;height:120px;overflow:hidden;}    
/* 总容器 */
.filebtn-hide{position:absolute;left:0;top:0;right:0;bottom:0;width:100%;height:100%;margin:0;padding:0;z-index:2;
    font-size:1000px;opacity:0;filter:alpha(opacity=0);-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";}
    /* 放在上层的透明的上传控件 */
    .filebtn-img{position:absolute;left:0;top:0;right:0;bottom:0;width:100%;height:100%;z-index:1;} 
    /* 用图片替代上传控件 */
    .filebtn-ipt{position:absolute;left:0;top:0;right:0;bottom:0;width:100%;height:100%;z-index:1;
    border:1px solid #ccc;background:#f8f8f8;color:#666;text-align:center;font-size:14px;font-weight:bold;border-radius:4px;} 
    /* 用按钮替代上传控件 */
    </style>
    <p class="filebtn-box">
    <input type="file" name="uploadimg" class="filebtn-hide">
    <img src="http://pic.58pic.com/58pic/14/73/88/32x58PICwrz_1024.jpg" class="filebtn-img"></p><hr><p class="filebtn-box">
    <input type="file" name="uploadimg" class="filebtn-hide">
    <input type="button" name="" class="filebtn-ipt" value="本地上传"></p>

Pull down to select the pop-up layer 　2016-4-1

<script type="text/javascript" src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
    //房屋类型(弹出层)
    $(".js-housetype-btn").click(function(){
        $(&#39;.housetype-dropbox .absbox&#39;).slideToggle(200);
    });
    $(".housetype-dropbox .housetype-option").click(function(){
        $(this).addClass(&#39;active&#39;).siblings().removeClass(&#39;active&#39;);
        $(&#39;.js-housetype-btn&#39;).find(&#39;.ipt&#39;).val($(this).html());
        $(&#39;.housetype-dropbox .absbox&#39;).slideUp(500);
    });
});
</script>
<style type="text/css">
ul,li{margin:0;padding:0;list-style:none;}
dl,dt,dd,p{margin:0;padding:0;}
.l{float:left;}
.ipt-line{width:310px;height:42px;padding:0 25px;font-size:14px;line-height:42px;}
.ipt-line > dt{position:relative;float:left;color:#333;width:68px;height:42px;font-weight:bold;}
.ipt-line > dd{position:relative;float:left;color:#999;width:240px;height:42px;}
.ipt-line .ipt{display:block;color:#999;line-height:42px;height:42px;border:none;}
.ipt-line .js-area-btn{width:240px;height:42px;cursor:pointer;}
.js-housetype-btn .ipt{width:5em;}
.js-housetype-btn .housetype-icon{margin-top:20px;}
.housetype-dropbox{position:relative;height:0;}/* 房屋类型选择面板 */
.housetype-dropbox .absbox{position:absolute;display:none;left:0;top:0;width:323px;padding:14px 0 0 35px;background:#fff;border:1px solid #ececec;box-shadow:0 2px 10px #ccc;z-index:1;}
.housetype-dropbox .absbox .housetype-option{float:left;width:86px;height:28px;line-height:28px;background:#f1f1f1;color:#666;margin:0 10px 12px 0;text-align:center;cursor:pointer;}
.housetype-dropbox .absbox .housetype-option.active{background:#eb5405;color:#fff;}
</style>
<dl class="ipt-line clearfix">
    <dt class="l">类型</dt>
    <dd class="l js-housetype-btn"><input type="text" name="housetype" value="普通住宅" class="ipt l" disabled></dd>
</dl>
<!-- 下拉选择面板 start -->
<div class="housetype-dropbox">
    <ul class="absbox">
        <li class="housetype-option active">普通住宅</li>
        <li class="housetype-option">别墅</li>
        <li class="housetype-option">公寓</li>
        <li class="housetype-option">小户型</li>
    </ul>
</div>
<!-- 下拉选择面板 end -->

Determine whether to hide:

(Put a copy of the code here for easy search.)

var s1={a:1,b:2,c:333}
var s2=JSON.stringify(s1);　　　　//将json对象转为字符串
var s3=JSON.parse(s2);　　　　　　//将json字符串转为json对象

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