I'm writing a function detect if $("input[name='AAA']")
input has changed, and if input changed, click apply button it will popup alert, but my alert message popup three times, how to avoid it?
HTML part:
<ul class="form">
<li>
<span class="clumn1">Name:</span>
<span class="clumn2">
<input class="text" type="text" name="AAA">
</span>
</li>
<li>
<span class="clumn1">Address:</span>
<span class="clumn2">
<input class="text" type="text" name="BBB">
</span>
</li>
<li>
<span class="clumn1">Date:</span>
<span class="clumn2">
<input class="text" type="text" name="CCC">
</span>
</li>
</ul>
<a class="submitBtn" onclick="apply()" href="#">Apply</a>
jQuery part:
$(document).ready(function () {
$("input[name='AAA']").each(function() {
var stuff = $(this);
stuff.data('oldValue', stuff.val());
stuff.bind("input", function(event){
if (stuff.data('oldValue') != stuff.val()) {
$(".submitBtn").on("click", function () {
alert("Your changed name is:" + stuff.val())
});
}
});
});
});
You're binding click
event for the button every time the input[name='AAA']
value is changed.
You should register click
once and inside event handler compare old and new input value:
var stuff = $("input[name='AAA']");
var stuff_val = stuff.val();
$(".submitBtn").on("click", function () {
if(stuff_val !== stuff.val()){
stuff_val = stuff.val();
alert("Your changed name is:" + stuff_val)
}
});
var stuff = $("input[name='AAA']"); var stuff_val = stuff.val(); $(".submitBtn").on("click", function () { if(stuff_val !== stuff.val()){ stuff_val = stuff.val(); alert("Your changed name is: " + stuff.val()); } });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <ul class="form"> <li> <span class="clumn1">Name:</span> <span class="clumn2"> <input class="text" type="text" name="AAA"> </span> </li> <li> <span class="clumn1">Address:</span> <span class="clumn2"> <input class="text" type="text" name="BBB"> </span> </li> <li> <span class="clumn1">Date:</span> <span class="clumn2"> <input class="text" type="text" name="CCC"> </span> </li> </ul> <a class="submitBtn" href="#">Apply</a>
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.