[英]Checking if ALL form inputs are empty with jQuery
我正在嘗試驗證聯系表單,並且我想在填寫每個輸入字段后創建某種“表單已完成”消息(一些輸入是文本框,一些是單選按鈕)。
到目前為止,這是我的代碼:
$(document).ready(function() { $('.form:input').each(function() { if ($(this).val() != "") { $('.congrats').css("display", "block"); } }); });
p.congrats { display: none; }
<div class="form"> <input type="text" /> <br /> <input type="text" /> </div> <p class="congrats">Congrats!</p>
這應該讓你開始:
$(document).ready(function() { $(".form > :input").keyup(function() { var $emptyFields = $('.form :input').filter(function() { return $.trim(this.value) === ""; }); if (!$emptyFields.length) { console.log("form has been filled"); } }); });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="form"> <input type="text" /><br /> <input type="text" /> </div> <p class="congrats"></p>
試試這個 :
$("#a").on('click',function () { var bad=0; $('.form :text').each(function(){ if( $.trim($(this).val()) == "" ) bad++; }); if (bad>0) $('.congrats').css("display","block").text(bad+' missing'); else $('.congrats').hide(); });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="form"> <input type="text" /><br /> <input type="text" /> </div> <p class="congrats"></p><input style="width:100px" value="check" id="a" type="button" />
這個使用了 jQuery 的serializeArray
函數,所以你不必擔心檢查不同類型的字段或什么是空字段:
$.fn.isBlank = function() {
var fields = $(this).serializeArray();
for (var i = 0; i < fields.length; i++) {
if (fields[i].value) {
return false;
}
}
return true;
};
$('#check').click(function () { var allFilled = true; $(':input:not(:button)').each(function(index, element) { if (element.value === '') { allFilled = false; } }); console.log(allFilled); });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="form"> <input type="text" /><br /> <input type="text" /> </div> <p class="congrats"></p> <input type="button" id="check" value="check" />
jsFiddle: http : //jsfiddle.net/7huEr/38/
$(document).ready( function()
{
// Iterate over each input element in the div
$('.form input').each(function()
{
// Add event for when the input looses focus ( ie: was updated )
$(this).blur( function()
{
// Variable if all inputs are valid
var complete = true;
// Iterate over each input element in div again
$('.form input').each(function()
{
// If the input is not valid
if ( !$(this).val() )
{
// Set variable to not valid
complete = false;
}
});
// If all variables are valid
if ( complete == true )
{
// Show said congrats
$('.congrats').show();
}
});
});
});
現代香草解決方案:
// Returns True if all inputs are not empty
Array.from(document.querySelectorAll('#myform input')).every(
function(el){return el.value;}
)
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