我想知道HTML5是否有双重输入(写入两个相同的密码)的表单验证功能,而且您能否自己编写异常情况呢?
提前致谢!
我想知道HTML5是否有双重输入(写入两个相同的密码)的表单验证功能,而且您能否自己编写异常情况呢?
提前致谢!
如果你想要更好一点且使用了HTML5的工具,请尝试这个链接: http://www.html5rocks.com/en/tutorials/forms/html5forms/
<label>Password:</label>
<input type="password" id="password" name="password">
<label>Confirm Password:</label>
<input type="password" id="passwordconf" name="passwordconf" oninput="check(this)">
<script language='javascript' type='text/javascript'>
function check(input) {
if (input.value != document.getElementById('password').value) {
input.setCustomValidity('The two passwords must match.');
} else {
// input is valid -- reset the error message
input.setCustomValidity('');
}
}
</script>
通过将以下内容添加到您的CSS中,可以使其更加华丽。 当输入字段未通过HTML5验证时,它会在错误的输入字段周围添加红色边框。
:invalid {
border: 2px solid #ff0000;
}
完成了。您仍应使用alert()或服务器端验证来确保用户正确输入两个密码。不要依赖客户端任何内容。
我曾经遇到过类似的问题,为了使用HTML5 API解决它,我做了以下操作:设置了一个密码模式,要求密码至少包含八个字母和一个数字。然后为了让它们匹配,我做了:
var password = document.querySelector('#password'),
passwordConfirm = document.querySelector('#password_confirm');
[].forEach.call([password, passwordConfirm], function(el) {
el.addEventListener('input', function() {
if (!el.validity.patternMismatch) {
if ( password.value === passwordConfirm.value ) {
try{password.setCustomValidity('')}catch(e){}
} else {
password.setCustomValidity("Password and password confirm doesn\'t match")
}
}
}, false)
});
使用el.validity.patternMismatch
先检查模式的有效性,然后再检查两个的有效性。这是我的密码输入框,带有模式。
<input type="password" pattern="^((?=.*(\d|\W))(?=.*[a-zA-Z]).{8,})$" id="password" />
我很确定那是不可能的。此外,它可以很容易地被JavaScript覆盖,为什么不使用它呢?
这个完美地运作:
<script language="javascript">
function checkPassword() {
if (document.pwForm.pw1.value != document.pwForm.pw2.value) {
alert ('The passwords do not match!');
return false;
}
}
</script>
<form action="filename.ext" name="pwForm" method="GET/POST">
<input type="password" name="pw1" value=""><br />
<input type="password" name="pw2" value=""><br />
<input type="Submit" name="CheckPassword" value="Check Passwords" onClick="return checkPassword();">
</form>
我想这就是你要找的。
<p>Password: <input type="password" required pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,}" name="pwd1" onchange="
this.setCustomValidity(this.validity.patternMismatch ? 'Password must contain at least 6 characters, including UPPER/lowercase and numbers' : '');
if(this.checkValidity()) form.pwd2.pattern = this.value;
"></p>
<p>Confirm Password: <input type="password" required pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,}" name="pwd2" onchange="
this.setCustomValidity(this.validity.patternMismatch ? 'Please enter the same Password as above' : '');
"></p>
这将对密码和重新输入密码字段进行验证。
另一个选择是使用http://jqueryvalidation.org/validate/,如果您不介意使用Jquery来完成您的工作。
查看http://jqueryvalidation.org/equalTo-method
<form id="myform">
<label for="password">Password</label>
<input id="password" name="password" />
<br/>
<label for="password_again">Again</label>
<input class="left" id="password_again" name="password_again" />
<br>
<input type="submit" value="Validate!">
</form>
<script>
$( "#myform" ).validate({
rules: {
password: "required",
password_again: {
equalTo: "#password"
}
}
});
</script>
如果需要,您还可以编写更复杂的方法:http://jqueryvalidation.org/category/plugin/
谢谢Kicker,这真的很有用。
我稍微扩展了一下,使密码和确认密码输入在开始输入时立即无效。
var password = document.querySelector(' input[name=usr_password]');
var passwordConfirm = document.querySelector(' input[name=usr_password_confirm]');
if (password && passwordConfirm)
{
[].forEach.call([password, passwordConfirm], function(el) {
el.addEventListener('input', function() {
if ( el.validity.patternMismatch === false) {
if ( password.value === passwordConfirm.value ) {
try{
password.setCustomValidity('');
passwordConfirm.setCustomValidity('');
}
catch(e){}
}
else {
password.setCustomValidity("The two passwords do not match");
}
}
if ((password.checkValidity() && passwordConfirm.checkValidity()) === false)
{
password.setCustomValidity("The two passwords do not match, and they don't comply with the password rules.");
passwordConfirm.setCustomValidity("The two passwords do not match, and they don't comply with the password rules.");
}
else
{
password.setCustomValidity('');
passwordConfirm.setCustomValidity('');
}
}, false)
});
}