Javascript calculate the sum of all input fields with a specific class
Question
Okay, i have this code which is working fine to a specific point.
$(document).ready(function(){
var val1 = +$(".charge").val();
var val2 = +$(".fee").val();
var val3 = +$(".loadrate").val();
$("#finalrate").val(val1-val2+val3);
$(".financeinput").keyup.each(function(){
var val1 = +$(".charge").val();
var val2 = +$(".fee").val();
var val3 = +$(".loadrate").val();
var initial = $("#finalrate").val();
$("#finalrate").val(val1-val2+val3);
var second = $("#finalrate").val();
if(initial < second){
$("#finalrate").removeClass("redardown").addClass("greenarup");
}
if(initial > second){
$("#finalrate").removeClass("greenarup").addClass("redardown");
}
if(initial = second){
}
});
});
I have multiple fields with class ".charge" and multiple fields with class ".fee" but the code here is getting only the values of the first fields with that class, while i need all of them to be calculated. I know this must be very easy, but i am fairly new to javascript.
2 answers
solution1
1 ACCPTED 2015-01-15 18:07:04
You should use .each on your 'charge' and 'fee' inputs.
$(".charge").each(function()
{
$(this).val(); // this should have value for current input
}
here is a link that shows how to use the each function
Here is an example so you can see how it works:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta http-equiv="cache-control" content="max-age=0" />
<meta http-equiv="cache-control" content="no-cache" />
<meta http-equiv="expires" content="0" />
<meta http-equiv="expires" content="Tue, 01 Jan 1980 1:00:00 GMT" />
<meta http-equiv="pragma" content="no-cache" />
<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<title>Login</title>
</head>
<body>
<input class="test" type="text" value="2">
<input class="test" type="text" value="3">
<input class="test" type="text" value="4">
</body>
<script type="text/javascript">
var test1 = 0;
$(".test").each(function(){
test1 += parseInt($(this).val());
});
window.alert("" + test1);
</script>
</html>
I'm not sure exactly what you are trying to do but you might want something like this:
var val1 = 0;
$(".charge").each(function(){
val1 += parseInt($(this).val());
});
window.alert("" + val1); // should have all .charge added up here
solution2
0 2015-01-15 18:07:56
this is just a pseudocode but basically your solution may look like this (pure js)
var x = document.getElementsByClassName("charge");
for(var i = 0; i<x.length; i++){
sum += x[i].value;
}
and just do that for all the classes you need
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