소프트웨어 이론교육/웹 프로그래밍 기본

Javascript (10) - 이미지 파일 불러오기

마루설아 2022. 7. 29. 10:52
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="">
        <input type="file" class="file" id="imageSelector" name="imageSelector"
        accept="image/jpeg, image/jpg, image/png" multiple />
    </form>
    <div id="preview-image"></div>

    <script>
        var fileInput = document.getElementById("imageSelector");

        function readImage(input){
            if(input.files && input.files[0]){
                const reader = new FileReader();

                reader.onload = (e) => {
                    let readFileURL = e.target.result;
                    const previewImageDiv = document.getElementById("preview-image");
                    previewImageDiv.innerHTML = `<img src="${readFileURL}" width="200" />`;
                }

                reader.readAsDataURL(input.files[0]);
            }
        }

        fileInput.onchange = (e) => {
            readImage(e.currentTarget);
        };
    </script>
</body>
</html>