Can You Keep HTML Table Headers Fixed When You Scroll?
HTML tables are a great way to display tabular data. However, when tables are long, it can be difficult to keep track of the column headers. This is especially true if the table is wide and the headers are not visible on the screen.
One way to address this problem is to freeze the column headers so that they stay visible even when the table is scrolled. This can be achieved using a variety of CSS and JavaScript techniques.
CSS Transforms
If you only care about modern browsers, a fixed header can be achieved much easier by using CSS transforms. Here's how it works:
- Add an event listener to the table wrapper. This listener will be triggered when the table is scrolled.
- Get the scrollTop value of the wrapper. This value represents the number of pixels the table has been scrolled vertically.
- Apply a translate transformation to the table header. This transformation will move the header up by the same number of pixels that the table has been scrolled.
Here's the JavaScript code for this technique:
document.getElementById("wrap").addEventListener("scroll", function() {
var translate = "translate(0," + this.scrollTop + "px)";
this.querySelector("thead").style.transform = translate;
});
Here's a full example for reference:
<div>
#wrap {
width: 100%;
height: 400px;
overflow: auto;
}
th {
width: 200px;
}
td {
width: 200px;
height: 100px;
background-color: lightgray;
}The above is the detailed content of How Can I Keep HTML Table Headers Fixed While Scrolling?. For more information, please follow other related articles on the PHP Chinese website!
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