使用 JavaScript 将多张图片合并为一张图片

javascriptweb developmentobject oriented programming更新于 2025/8/27 9:16:17

以下是使用 JavaScript 将多张图片合并为一张图片的代码 −

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;
   }
</style>
</head>
<body>
<h1>Combining multiple images into a single one</h1>
<img class="image" src="https://i.picsum.photos/id/845/250/250.jpg?hmac=2l7QArh4UKul2qF-JvTjaBu3-WF2KpKBgpBALmFoxWY"/>
<img class="image" src="https://i.picsum.photos/id/925/250/250.jpg?hmac=twWJdaKT46cPk1aNvB7aKdiLZoQ zvzu5VW85OEUO4ys"/>
<canvas class="result"></canvas>
<br />
<button class="btn">点击此处</button>
<h3>Click on the above button to combine the two images above together</h3>
<script>
   let imgEle1 = document.querySelectorAll(".image")[0];
   let imgEle2 = document.querySelectorAll(".image")[1];
   let resEle = document.querySelector(".result");
   var context = resEle.getContext("2d");
   let BtnEle = document.querySelector(".Btn");
   BtnEle.addEventListener("click", () => {
   resEle.width = imgEle1.width;
      resEle.height = imgEle1.height;
      context.globalAlpha = 1.0;
      context.drawImage(imgEle1, 0, 0);
      context.globalAlpha = 0.5;
      context.drawImage(imgEle2, 0, 0);
   });
</script>
</body>
</html>