Question

<form id="contact_form" action="/contact-verzenden" method="POST" enctype="multipart/form-data" >
    <input  class="textbox" type="text" name="name" id="name" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'Naam':this.value;" value="Jouw naam" required/>
    <input  class="textbox" type="text" name="name" id="tel" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'Telefoon':this.value;" value="Telefoon" required/>
    <input  class="textbox" type="text" name="email" id="email" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'E-mail':this.value;" value="E-mail" required/>
    <textarea rows="6" cols="30" type="text" name="message" id="message" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'Vraag/opmerking':this.value;" required >Vraag/opmerking</textarea>
    <input id="submit_button" type="submit" value="Verzenden" />
</form>

当我点击提交时，无论是否输入了某些内容，数据都会发送。

即使它与W3学校的例子完全相同：

http://www.w3schools.com/html/tryit.asp?filename=tryhtml5_input_required

我做错了什么？

Answer 1

因为您在每个输入元素中仍然有值尝试使用占位符使其看起来像您的设计。

$(function () {
    $('#container').highcharts({
        chart: {
            type: 'column'
        },
        title: {
            text: 'Stacked column chart'
        },
        xAxis: {
            categories: ['Apples', 'Oranges', 'Pears', 'Grapes', 'Bananas']
        },
        yAxis: {
            min: 0,
            title: {
                text: 'Total fruit consumption'
            },
            stackLabels: {
                enabled: true,
                style: {
                    fontWeight: 'bold',
                    color: (Highcharts.theme && Highcharts.theme.textColor) || 'gray'
                }
            }
        },
        legend: {
            align: 'right',
            x: -30,
            verticalAlign: 'top',
            y: 25,
            floating: true,
            backgroundColor: (Highcharts.theme && Highcharts.theme.background2) || 'white',
            borderColor: '#CCC',
            borderWidth: 1,
            shadow: false
        },
        tooltip: {
            headerFormat: '<b>{point.x}</b><br/>',
            pointFormat: '{series.name}: {point.y}<br/>Total: {point.stackTotal}'
        },
        plotOptions: {
            column: {
                stacking: 'normal',
                dataLabels: {
                    enabled: true,
                    color: (Highcharts.theme && Highcharts.theme.dataLabelsColor) || 'white',
                    style: {
                        textShadow: '0 0 3px black'
                    }
                }
            }
        },
        series: [{
            name: 'John',
            data: [5, 3, 4, 7, 2]
        }, {
            name: 'Jane',
            data: [2, 2, 3, 2, 1]
        }, {
            name: 'Joe',
            data: [3, 4, 4, 2, 5]
        }]
    });
});

Answer 2

因为你已经给了他价值（value="Jouw naam"）而且还有onblur你给它一个值（"Naam"）。所以价值从不为空。这就是它提交表格的原因。

添加placeholder="Jouw naam"代替value = "Jouw naam"

希望它有所帮助!!

Answer 3

检查此代码：

<!DOCTYPE html>
<form id="contact_form" method="POST" enctype="multipart/form-data" >
    <input  class="textbox" type="text" name="name" id="name" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'Naam':this.value;" placeholder="Jouw naam" required/>
    <input  class="textbox" type="text" name="name" id="tel" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'Telefoon':this.value;"  placeholder="Telefoon" required/>
    <input  class="textbox" type="text" name="email" id="email" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'E-mail':this.value;"  placeholder="E-mail" required/>
    <textarea rows="6" cols="30" type="text" name="message" id="message" onclick="this.value='';" onfocus="this.select()" onblur="this.value=!this.value?'Vraag/opmerking':this.value;" required ></textarea>
    <input id="submit_button" type="submit" value="Verzenden" />
</form>
</html>

“必需”HTML5标记不起作用

3 个答案: