Fixing an element on Y axis, but scrolling with page on x axis? [duplicate]

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春和景丽

2021-01-22 10:10

Here's a quick example that does not require jQuery, and uses JavaScript to float the header down as the page scrolls:

var thead = document.querySelector(".tg tr:first-child");
window.onscroll = function() {
    thead.style["-webkit-transform"] = "translateY(" + window.scrollY + "px)";
    thead.style.transform = "translateY(" + window.scrollY + "px)";
};

.header {
    width: 2000px;
}
.tg  {
    border-collapse:collapse;
    border-spacing:0;
}
.tg td {
    font-family:Arial, sans-serif;
    font-size:14px;
    padding:10px 5px;
    border-style:solid;
    border-width:1px;
    overflow:hidden;
    word-break:normal;
}
.tg th {
    font-family:Arial, sans-serif;
    font-size:14px;
    font-weight:normal;
    padding:10px 5px;
    border-style:solid;
    border-width:1px;
    overflow:hidden;
    word-break:normal;
}
.tg .tg-i7wz {
    font-size:20px;
}

.tg tr:first-child {
    background-color: white;
    outline: solid 1px black;
}

<table class="tg">
  <tr>
    <th class="tg-i7wz">HEADER 1</th>
    <th class="tg-031e">HEADER 2</th>
    <th class="tg-031e">HEADER 3</th>
    <th class="tg-031e">HEADER 4</th>
    <th class="tg-031e">HEADER 5</th>
    <th class="tg-031e">HEADER 6</th>
    <th class="tg-031e">HEADER 7</th>
    <th class="tg-031e">HEADER 8</th>
    <th class="tg-031e">HEADER 9</th>
    <th class="tg-031e">HEADER 10</th>
    <th class="tg-031e">HEADER 11</th>
    <th class="tg-031e">HEADER 12</th>
    <th class="tg-031e">HEADER 13</th>
    <th class="tg-031e">HEADER 14</th>
    <th class="tg-031e">HEADER 15</th>
    <th class="tg-031e">HEADER 16</th>
    <th class="tg-031e">HEADER 17</th>
    <th class="tg-031e">HEADER 18</th>
    <th class="tg-031e">HEADER 19</th>
    <th class="tg-031e">HEADER 20</th>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT </td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
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    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
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    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
  <tr>
    <td class="tg-031e">CONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENTCONTENT CONTENT</td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
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    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
    <td class="tg-031e"></td>
  </tr>
</table>

JSFiddle Version: http://jsfiddle.net/0n9d92er/4/

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