Baseline Widely available
HTMLTableRowElement
æ¥å£ç rowIndex
åªè¯»å±æ§è¡¨ç¤ºå
ç´ æå¨è¡ç¸å¯¹äºæ´ä¸ª <table>
çé»è¾ä½ç½®ã
å³ä½¿ <thead>
ã<tbody>
å <tfoot>
å
ç´ å¨ HTML ä¸ä¹±åºæåï¼æµè§å¨ä¹ä¼ä»¥æ£ç¡®çé¡ºåºæ¸²æè¡¨æ ¼ãå æ¤ï¼è¡å·çæ 记顺åºä¸ºï¼ä» <thead>
å° <tbody>
ï¼åå° <tfoot>
ã
è¿å该è¡çç´¢å¼ï¼å¦æè¯¥è¡ä¸å±äºè¡¨çä¸é¨åï¼åè¿å -1
ã
æ¬ç¤ºä¾ä½¿ç¨ JavaScript æ 记表ä¸çææè¡å·ã
HTML<table>
<thead>
<tr>
<th>åå</th>
<th>ä»·æ ¼</th>
</tr>
</thead>
<tbody>
<tr>
<td>é¦è</td>
<td>$2</td>
</tr>
<tr>
<td>æ©å</td>
<td>$8</td>
</tr>
<tr>
<td>西å·çæ</td>
<td>$20</td>
</tr>
</tbody>
<tfoot>
<tr>
<td>æ»è®¡</td>
<td>$30</td>
</tr>
</tfoot>
</table>
JavaScript
const rows = document.querySelectorAll("tr");
rows.forEach((row) => {
const z = document.createElement("td");
z.textContent = `(è¡ #${row.rowIndex})`;
row.appendChild(z);
});
ç»æ è§è æµè§å¨å
¼å®¹æ§ åè§
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