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Detailed explanation of html5 forms and new improved elements

黄舟Original: 2017-02-24 14:26:421503browse

<!DOCTYPE html>    

    <html>    

        <head>    

            <meta charset="UTF-8">    

            <title></title>    

        </head>    

        <body>    

            <!--表单内元素的form属性：为元素指定一个form属性，属性值为该表单的id-->  

            <form id="testform">    

                <input type="submit" />    

            </form>    

            <textarea form="testform"></textarea> <br /><hr />    

            <!--表单内元素的formaction属性：可以提交到不同页面-->  

            <form id="form1" action="test.aspx">    

                <input type="submit" name="s1" value="内部提交到test2" formaction="test2.aspx" />    

                <input type="submit"  />    

            </form>    

            <!--formmethod:可以为每个表单元素指定不同的提交方法-->  

            <form id="form2" action="test.aspx">    

                name:<input type="text" name="name" /><br />    

                <input type="submit" value="post方式提交"  formmethod="post"/>    

                <input type="submit" value="get方式提交"  formmethod="get"/>    

            </form><br/><hr />    

            <!--formenctype:可以指定不同的编码方式-->  

            <form action="test2.aspx" method="post">    

                <input type="text" name="name" id="name" value="test" />    

                文件:<input type="file" name="files" />    

                <input type="submit"  value="上传" formaction="test.aspx"  formenctype="multipart/form-data"/>    

                <input type="submit" value="提交" />    

            </form><br /><hr />    

            <!--formtarget:提交后再何处打开页面-->  

            <form action="test.aspx">    

                <input type="submit" name="s1"  value="s1本页打开" formaction="test2.aspx"  formtarget="_self"/>提交到test2    

                <input type="submit" name="s"  value="s新页打开" formaction="test.aspx"  formtarget="_blank"/>提交到test    

            </form><hr />    

            <!--autofocus:自动获得光标焦点-->  

            <input type="text" autofocus /><br />    

            <!--control:通过该属性来访问该表单元素-->  

            <form >    

                <label id="label">    

                邮编：<input id="txtzip" maxlength="6" /><small>请输入6位数字</small>    

                </label>    

                <input type="button" value="设置默认值" onclick="setValue()" />    

            </form>    

            <!--placeholder:未输入状态的输入提示-->  

            <input type="text" placeholder="请输入内容" /><br />    

            <!--list:单行文本框的list属性，属性值为datalist的id。    autocomplete：自动完成-->  

            list属性：<input type="text" list="mylist" autocomplete="on"/>    

            <datalist id="mylist" >    

                <option value="第一">第一</option>    

                <option value="第二">第二</option>    

                <option value="第三">三</option>    

            </datalist><br />    

            <!--pattern：设置正则表达式验证-->  

            <form>    

            输入一个字母与三个大写字母：<input type="text" pattern="[0-9][A-Z]{3}"  required=""/>    

            <input type="submit" />    

            </form><br />    

            <!--indeterminate:说明复选框处于尚未明确是否选取状态-->  

            <input type="checkbox" indeterminate id="cb" />indeterminate<br />    

            <!--image的height和width设置图片高宽-->  

            设置图片宽高:<input type="image" src="img/webp.jpg" alt="编辑" width="23" height="23" /><br />    

            <!--textarea:maxlength和wrap属性：hard换行也要指定cols，soft不换行-->  

            <form action="test.aspx" method="post">    

                <textarea name="name" maxlength="10" rows="5" cols="5" wrap="hard"></textarea>    

                <input type="submit" value="提交" />    

            </form><br />    

         <!--url类型：只能提交url地址格式-->  

            url:<input type="url" name="url"  required=""/><input type="submit" /><br />    

            email:<input type="email" name="email" required=""/><input type="submit" /><br />    

            date(谷歌浏览器)：<input type="date" name="date"  /><br />    

            time(谷歌浏览器):<input type="time" name="time" /><br />    

            datetime-local:<input type="datetime-local" name="datetime"  value="2016-05-26T22:31:30"/><br />    

            <!--日期时间类型的step属性：单击调整时对选择值多大限定-->  

            step：<input type="date" step="3" /><br /><hr />    

            number:<input type="number"  value="25" min="10" min="20" max="30" step="2"  /><br />    

            range：<input type="range" value="25" min="10" max="100" step="5" /><br />    

            search:<input type="search"/><br />    

            tel:<input type="tel"  /><br />    

            color:<input type="color" /><br />    

            <hr />    

            output元素的追加：    

            <form id="testform">    

                请选择一个值:<input type="range" id="range" min="5" max="100" step="5" value="10" onchange="out();"/>    

                <output id="out">10</output>    

            </form>    

        </body>    

    </html>    

    <script type="text/javascript">    

        function setValue(){    

            var lable=document.getElementById("label");    

            var txtbox=lable.control;//通过control该属性来访问该表单元素    

            txtbox.value="213001";    

        }    

        //indeterminate测试设置为true    

        var cb=document.getElementById("cb");    

        cb.indeterminate=true;    

        //选择的值output输出    

        function out(){    

            Debug;    

            var number=document.getElementById("range").value;    

            document.getElementById("out").value=number;    

        }    

    </script>

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