JavaScript DataView()
javascriptweb developmentfront end technology更新于 2024/7/13 11:32:00
JavaScript DataView 通过提供低级接口，允许我们在二进制 ArrayBuffer 中读取和写入多种数字类型。如果不使用 DataView()，我们就无法直接操作 ArrayBuffer。
以下是实现 JavaScript DataView 的代码 −
示例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.sample {
font-size: 20px;
font-weight: 500;
}
</style>
</head>
<body>
<h1>JavaScript DataView()</h1>
<div class="sample"></div>
<button class="btn">点击此处</button>
<h3>
Click on the above button to change the array buffer contents using
DataView()
</h3>
<script>
let fillEle = document.querySelector(".sample");
var buffer = new ArrayBuffer(8);
var view1 = new DataView(buffer);
view1.setInt16(0, 0x2721);
fillEle.innerHTML = view1.getInt16(0).toString(16);
document.querySelector(".Btn").addEventListener("click", () => {
fillEle.innerHTML = view1.getInt16(0).toString(2);
});
</script>
</body>
</html>
输出
点击“CLICK HERE”按钮 −
