JavaScript预览图片

时间：2020-07-21 13:37:05 收藏：0 阅读：105
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>图片本地预览示例</title>
</head>
<body>
<h3>图片本地预览示例</h3>
<input type="file" accept="image/*" onchange="loadFile(event)" />
<img id="previewContainer" src="" />

<script>
    const output = document.querySelector("#previewContainer");
    const loadFile = function (event) {
        const reader = new FileReader();
        reader.onload = function () {
            console.log(reader);
            output.src = reader.result;
        };
        reader.readAsDataURL(event.target.files[0]);
    };
</script>
</body>
</html>