禁用提交如果输入空jQuery的 [英] Disable submit if inputs empty jquery
问题描述
免责声明:我知道这个主题有很多问题,并且已经得到了很好的解决,尽管我需要我的帮助。
我试图检查输入值是否在keyup上为空,然后禁用提交按钮。我的HTML片段:
< div class ='form'>
< form>
< div class ='field'>
< label for =用户名>用户名< / label>
< input id =usernametype =text/>
< / div>
< div class ='field'>
< label for =password>密码< / label>
< input id =passwordtype =password/>
< / div>
< div class ='actions'>
< input type =submitvalue =Login/>
< / div>
< / form>
< / div>
我使用了这里进行一些修改:
<$ c ()函数()函数(){
$('。field input')。keyup(函数(){
var empty = false;
$('。field input ').each(function(){
if($(this).val()==''){
empty = true;
}
});
if(empty){
$('.action input')。attr('disabled',true);
} else {
$('。actions输入')。attr('disabled',false);
}
});
})()
任何帮助将不胜感激!
我会建议禁用按钮默认。我还会查看 .val()
的长度,而不是检查空字符串。最后,我认为 document.ready()
比现有代码更具可读性:以下是完整的代码:
HTML
< div class ='form'>
< form>
< div class ='field'>
< label for =用户名>用户名< / label>
< input id =usernametype =text/>
< / div>
< div class ='field'>
< label for =password>密码< / label>
< input id =passwordtype =password/>
< / div>
< div class ='actions'>
< input type =submitvalue =Logindisabled =disabled/>
< / div>
< / form>
< / div>
JS / jQuery
$(document).ready(function(){
$('。field input')。keyup(function (){
var empty = false;
$('。field input')。each(function(){
if($(this).val()。 (空){
$ = $ b $('。 ).attr('disabled','disabled');
} else {
$('.action input')。removeAttr('disabled');
}
} );
});
这里是工作小提琴。
Disclaimer: I know there are quite a few questions out there with this topic and it has been highly addressed, though I need assistance in my particular case.
I am trying to check if the input values are empty on keyup then disable the submit button.
My HTML snippet:
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" />
</div>
</form>
</div>
I have used the example answer from here with some modifications:
(function() {
$('.field input').keyup(function() {
var empty = false;
$('.field input').each(function() {
if ($(this).val() == '') {
empty = true;
}
});
if (empty) {
$('.actions input').attr('disabled', true);
} else {
$('.actions input').attr('disabled', false);
}
});
})()
Any help would be greatly appreciated!
I would suggest disabling the button by default. I would also look at the length of the .val()
, not check for an empty string. Lastly, I think document.ready()
is much more readable than your existing code: Here is the full code:
HTML
<div class='form'>
<form>
<div class='field'>
<label for="username">Username</label>
<input id="username" type="text" />
</div>
<div class='field'>
<label for="password">Password</label>
<input id="password" type="password" />
</div>
<div class='actions'>
<input type="submit" value="Login" disabled="disabled" />
</div>
</form>
</div>
JS/jQuery
$(document).ready(function() {
$('.field input').keyup(function() {
var empty = false;
$('.field input').each(function() {
if ($(this).val().length == 0) {
empty = true;
}
});
if (empty) {
$('.actions input').attr('disabled', 'disabled');
} else {
$('.actions input').removeAttr('disabled');
}
});
});
Here's a working fiddle.
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