[英]Adding keyup each input with jQuery
由於我的代碼具有多個輸入字段,因此我對將關鍵字放置在何處感到困惑。考慮到我對javascript的了解有限,我只知道將關鍵字放入單個輸入中,因此任何輸入都應自動更新平均列。自動計算總平均值。希望有人能在這里幫助我。謝謝!
樣品表
Subject | 1stG | secG | 3rdG |4thG | Average
English 0 0 0 0 0 inputs here except for Average
Psychology 0 0 0 0 0
總平均值在這里...
HTML
<tr>
<th colspan="3">Subjects</th>
<th colspan="2">First Grading</th>
<th colspan="2">Second Grading</th>
<th colspan="2">Third Grading</th>
<th colspan="2">Fourth Grading</th>
<th>Average</th>
</tr>
</thead>
<tbody
@foreach($update_card['AllGrade'] as $subject)
{!! Form::hidden('grade_id[]',$subject['grade_id']) !!}
<tr>
<th colspan="3">{!! $subject->subject !!}</th>
<td colspan="2">{!! Form::text('term_1[]',$subject->term_1,['class'=>'form-control','name[]'=>'term_1','id[]'=>'term_1','value'=>'']) !!}</td>
<td colspan="2">{!! Form::text('term_2[]',$subject->term_2,['class'=>'form-control','name[]'=>'term_2','id[]'=>'term_2','value'=>'']) !!}</td>
<td colspan="2">{!! Form::text('term_3[]',$subject->term_3,['class'=>'form-control','name[]'=>'term_3','id[]'=>'term_4','value'=>'']) !!}</td>
<td colspan="2">{!! Form::text('term_4[]',$subject->term_4,['class'=>'form-control','name[]'=>'term_4','id[]'=>'term_4','value'=>'']) !!}</td>
<td colspan="2" class="average" value=""> Average</td>
</tr
@endforeach
<tr>
<th colspan="11">Total Average:</th>
<th>{!! Form::text('scholar_GPA',$update_card->scholar_GPA,['class'=>'form-control total-ave','name' => 'total-ave','id' => 'total-ave','value' => '']) !!}</th>
</tr>
腳本
<script type="text/javascript">
$("tbody tr").each(function() {
var total = 0;
var ave = 0;
var count = 1;
$(this).children('td').not(':last').each(function () {//foreach of the column of the row
//"this" is the current element in the loop
var number = ($(this).children('input').length == 0) ? $(this).html() : $(this).children('input').first().val();
total += parseInt(number);
ave = total/count;
alert(number+' '+total);
alert('td'+count);
count++;
});
alert('last'+ave);
$(this).children('td').last().html(ave);//loop the row
});
</script>
您走在正確的軌道上。 在每個輸入上放置一個向上偵聽器,但讓它運行相同的功能來更新平均列。 提示:當前函數應該是發生任何更改(重新計算)時要運行的函數。
如果需要的話,請檢查這個矮人,但一定要先嘗試一下!
https://plnkr.co/edit/0fJgNDty9OiW5KeBJbn8
<html>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js">
</script>
<script src="script.js"></script>
<input type="text" value="0">
<input type="text" name="" id="" value="0" />
<p id="average">0</p>
<script>
function calculateAverage(){
sum = 0
$("input").each(function(){
sum += parseInt($(this).val())
})
$("#average").text(sum)
}
$("input").on("keyup", function(){
calculateAverage()
})
</script>
</html>
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