回答編集履歴
2
複数のtable要素に適用できるようにした
test
CHANGED
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@@ -1,3 +1,7 @@
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### 修正方針
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> ```JavaScript
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> var len = editTbl.rows[1].cells.length; // 列数, セルへの参照はrowsのcellsコレクション
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@@ -10,11 +14,15 @@
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合計値を出力するtd要素ノードの `cellIndex` を変数に格納し、`editTbl.rows[1].cells[cellIndex]` で cellIndex を固定すれば、列の合計値を算出できるでしょう。
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構造上、thead, tbody, tfoot に分けた方が良いと思ったので、HTMLに少し手を入れました。
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後述のコードでは、構造上、thead, tbody, tfoot に分けた方が良いと思ったので、HTMLに少し手を入れました。
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### コード
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- [table要素の列の合計値を算出 - JSFiddle](https://jsfiddle.net/75wt6pja/
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- [table要素の列の合計値を算出 - JSFiddle](https://jsfiddle.net/75wt6pja/2/)
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@@ -22,7 +30,7 @@
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<!--テーブル1月-->
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<table
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<table class="calc">
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<thead>
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@@ -286,45 +294,341 @@
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</table>
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<p><button
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<p><button class="execute-calc" type="button">計算</button></p>
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<!--//テーブル1月-->
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<!--テーブル2月-->
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<table class="calc">
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<thead>
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<tr>
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<th colspan="6">2月</th>
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</tr>
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<tr>
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<th colspan="2">収入</th>
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<th colspan="2">出費</th>
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<th colspan="1">備考</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>文字</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>個人貯金</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<td>文字</td>
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<td><input type="number"></td>
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<td>共通貯金</td>
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<td><input type="number"></td>
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<td>サンプル</td>
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</tr>
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</tbody>
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<tfoot>
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<tr>
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<th>合計</th>
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<td class="sum"><input type="number"></td>
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<th>合計</th>
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<td class="sum"><input type="number"></td>
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<td>サンプル</td>
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</tr>
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<tr>
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<th colspan="5">残高</th>
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</tr>
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<tr>
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<td colspan="5"></td>
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</tr>
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<tr>
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<th colspan="3">個人貯金残高</th>
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<td colspan="2"></td>
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</tr>
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<tr>
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<th colspan="3">共通貯金残高</th>
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<td colspan="2"></td>
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</tr>
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<tr>
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<th colspan="3">合計貯金残高</th>
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<td colspan="2"></td>
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</tr>
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</tfoot>
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566
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</table>
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568
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569
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<p><button class="execute-calc" type="button">計算</button></p>
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<!--//テーブル2月-->
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<script>
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'use strict';
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(function () {
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function handleClick (event) {
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var table = event.target.
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var table = event.target.parentNode.previousElementSibling,
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sumList = table.getElementsByClassName('sum');
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sumList = table.getElementsByClassName('sum');
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for (var i = 0, len = sumList.length, sumCell, sum; i < len; ++i) {
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for (var i = 0, len = sumList.length, sumCell, sum; i < len; ++i) {
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sumCell = sumList[i];
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sumCell = sumList[i];
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sum = 0;
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sum = 0;
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for (var j = 0, rows = table.tBodies[0].rows, rLen = rows.length, cellIndex = sumCell.cellIndex; j < rLen; ++j) {
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for (var j = 0, rows = table.tBodies[0].rows, rLen = rows.length, cellIndex = sumCell.cellIndex; j < rLen; ++j) {
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sum += rows[j].cells[cellIndex].firstChild.valueAsNumber || 0;
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sum += rows[j].cells[cellIndex].firstChild.valueAsNumber || 0;
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}
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sumCell.firstChild.value = sum;
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}
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sumCell.firstChild.value = sum;
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}
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610
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611
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612
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613
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function main () {
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614
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615
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var button = this.document.getElementsByClassName('execute-calc');
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616
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617
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618
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619
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for (var i = 0, len = button.length; i < len; ++i) {
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620
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621
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button[i].addEventListener('click', handleClick, false);
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622
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623
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}
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624
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625
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}
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626
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627
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628
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629
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main.call(this);
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630
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327
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}
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631
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}.call(this));
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328
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</script>
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@@ -332,4 +636,12 @@
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### 更新履歴
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- 2017/07/05 12:43 複数のtable要素に適用できるようにした
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Re: tukapon_ さん
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1
`editTbl\.rows\[1\]\.cells\[cellIndex\]` で cellIndex を固定
test
CHANGED
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@@ -8,6 +8,8 @@
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8
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`querySelectorAll` やjQueryのセレクタエンジンはそこそこコストがかかるので、速さを重視するなら `rows[i].cells[j]` も有りだと思います。
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合計値を出力するtd要素ノードの `cellIndex` を変数に格納し、`editTbl.rows[1].cells[cellIndex]` で cellIndex を固定すれば、列の合計値を算出できるでしょう。
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構造上、thead, tbody, tfoot に分けた方が良いと思ったので、HTMLに少し手を入れました。
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