HTML / JS - 如何放大和拖动表?
答案:
要实现在HTML页面中放大和拖动表格,可以使用JavaScript和一些CSS样式来实现。下面是一种常见的实现方法:
下面是一个示例代码:
HTML:
<div id="table-container">
<table>
<tr>
<td>Cell 1</td>
<td>Cell 2</td>
</tr>
<tr>
<td>Cell 3</td>
<td>Cell 4</td>
</tr>
</table>
</div>
CSS:
#table-container {
width: 400px;
height: 300px;
overflow: auto;
}
table {
width: 100%;
border-collapse: collapse;
}
td {
border: 1px solid black;
padding: 10px;
}
JavaScript:
var tableContainer = document.getElementById("table-container");
tableContainer.addEventListener("wheel", function(event) {
var delta = Math.sign(event.deltaY);
var scale = parseFloat(tableContainer.style.transform.replace("scale(", "").replace(")", "")) || 1;
if (delta > 0) {
scale -= 0.1;
} else {
scale += 0.1;
}
tableContainer.style.transform = "scale(" + scale + ")";
});
var isDragging = false;
var startPosition = { x: 0, y: 0 };
tableContainer.addEventListener("mousedown", function(event) {
isDragging = true;
startPosition.x = event.clientX - tableContainer.offsetLeft;
startPosition.y = event.clientY - tableContainer.offsetTop;
});
tableContainer.addEventListener("mousemove", function(event) {
if (isDragging) {
var offsetX = event.clientX - tableContainer.offsetLeft - startPosition.x;
var offsetY = event.clientY - tableContainer.offsetTop - startPosition.y;
tableContainer.style.left = offsetX + "px";
tableContainer.style.top = offsetY + "px";
}
});
tableContainer.addEventListener("mouseup", function() {
isDragging = false;
});
上述代码实现了一个简单的放大和拖动表格的功能。通过滚动鼠标滚轮可以放大或缩小表格,通过按下鼠标左键并移动可以拖动表格。
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