input 上傳圖片,獲取base64

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <input type="file" onchange="upload(this.files)" multiple/>
</body>
<script>
    function upload(f) {
        for (var i = 0; i < f.length; i++) {
            var reader = new FileReader();
            reader.readAsDataURL(f[i]);
            reader.onload = function (e) {
                const base64Img = e.target.result
                console.log(base64Img)
            }
        }

    }
</script>

</html>

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