Javascript 当单元格值大于特定值时,按不同颜色高亮显示html td
当td单元格值大于10时,我会尝试更改行颜色,但当鼠标悬停在深色上时,所有行都会变为高亮,当值大于10时,所有行都不会变为红色。我做错了什么 附加问题:我的html表有5列,我不希望最后一列是高位的。如何排除该列 CSS: JS: Html:Javascript 当单元格值大于特定值时,按不同颜色高亮显示html td,javascript,Javascript,当td单元格值大于10时,我会尝试更改行颜色,但当鼠标悬停在深色上时,所有行都会变为高亮,当值大于10时,所有行都不会变为红色。我做错了什么 附加问题:我的html表有5列,我不希望最后一列是高位的。如何排除该列 CSS: JS: Html: 有很多错误: HTML: 您应该关闭表标记。 不要为表行和表单元格提供id。请为表体或表提供一个想法,例如: <table> <thead> <tr> <th>Price<
有很多错误: HTML: 您应该关闭表标记。 不要为表行和表单元格提供id。请为表体或表提供一个想法,例如:
<table>
<thead>
<tr>
<th>Price</th>
</tr>
</thead>
<tbody id="tbody">
<tr>
<td>2</td>
<td>3</td>
<td>11</td>
<td>13</td>
<td>5</td>
</tr>
</tbody>
</table>
JS:
我希望这对您足够详细,否则我建议您阅读w3schools或类似平台上的一些基本教程。我正确地附上了表格,只是复制/过去的打字错误,稍后我会检查。为什么不给你提到的东西提供身份证呢?我我见过很多堆栈asnwer向tr/table/td提供id。你能进一步解释吗?id应该是唯一的。那就给他们上课吧。如果您有超过100行,您想为每一行编写seperate代码吗?
<script type="text/javascript">
function Highlight(row) {
if(document.getElementById("price").value > 10)
{
document.getElementById(row).style.background = 'Red';
}
else
{
document.getElementById(row).removeAttribute("style");
document.getElementById(row).onMouseOver = function () { this.className = "hover"; }
}
}
</script>
<table>
<tr id="row1" onmouseover="javascript:Highlight('row1');">
<td id="price"></td>
</tr>
<table>
<table>
<thead>
<tr>
<th>Price</th>
</tr>
</thead>
<tbody id="tbody">
<tr>
<td>2</td>
<td>3</td>
<td>11</td>
<td>13</td>
<td>5</td>
</tr>
</tbody>
</table>
const tableBody = document.getElementById("tbody"); // get your table body or table if you don't want a table body
const rows = tableBody.getElementsByTagName("tr"); // get all your table rows inside your table body
// loop through all your tr elements
for (let i = 0; i < rows.length; i++) {
// here it is probably best to get the td element but because there is only one column there is no need for this.
// if there are more then 1 columns get the td element like this const td = rows[i].firstElementChild; if it is
// the first otherwise give them a class and get them with getElementsByClassName[0] on the rows[i]
// try to parse the innerText of the td or tr element to an integer (Number) because if there is text this will throw an exception
try {
// if price > 10 make background color of row red otherwise darkSalmon
if (parseInt(rows[i].innerText) > 10) {
rows[i].style.backgroundColor = "red";
}
else {
rows[i].style.backgroundColor = "darksalmon";
}
}
catch (e) {
console.error(e);
}
//if you want to do this on mousover you can add event listeners per row
rows[i].addEventListener("mouseover", () => {
try {
// if price > 10 make background color of row red otherwise darkSalmon
if (parseInt(rows[i].innerText) > 10) {
rows[i].style.backgroundColor = "red";
}
else {
rows[i].style.backgroundColor = "darksalmon";
}
}
catch (e) {
console.error(e);
}
});
//if you want to set the background color back on default when your mouse leaves the tr do this
rows[i].addEventListener("mouseleave", () => {
rows[i].style.backgroundColor = null;
});
}