基本範例

使用 Dropup 最簡單的方式。

最小設定

import { useDropup } from '@samithahansaka/dropup';

function BasicUploader() {
  const { files, getDropProps, getInputProps } = useDropup();

  return (
    <div
      {...getDropProps()}
      style={{
        border: '2px dashed #ccc',
        borderRadius: 8,
        padding: 40,
        textAlign: 'center',
        cursor: 'pointer',
      }}
    >
      <input {...getInputProps()} />
      <p>將檔案拖放到此處或點擊選擇</p>

      {files.length > 0 && (
        <ul style={{ listStyle: 'none', padding: 0, marginTop: 20 }}>
          {files.map(file => (
            <li key={file.id}>
              {file.name} ({(file.size / 1024).toFixed(1)} KB)
            </li>
          ))}
        </ul>
      )}
    </div>
  );
}

帶上傳功能

import { useDropup } from '@samithahansaka/dropup';

function BasicUploadWithSubmit() {
  const {
    files,
    actions,
    state,
    getDropProps,
    getInputProps,
  } = useDropup({
    upload: {
      url: '/api/upload',
      method: 'POST',
    },
  });

  return (
    <div>
      <div
        {...getDropProps()}
        style={{
          border: '2px dashed #ccc',
          borderRadius: 8,
          padding: 40,
          textAlign: 'center',
        }}
      >
        <input {...getInputProps()} />
        <p>將檔案拖放到此處或點擊選擇</p>
      </div>

      {/* 檔案列表 */}
      {files.length > 0 && (
        <div style={{ marginTop: 20 }}>
          <h3>已選擇的檔案：</h3>
          {files.map(file => (
            <div
              key={file.id}
              style={{
                display: 'flex',
                justifyContent: 'space-between',
                padding: 10,
                borderBottom: '1px solid #eee',
              }}
            >
              <span>{file.name}</span>
              <span>{file.status}</span>
              <button onClick={() => actions.remove(file.id)}>移除</button>
            </div>
          ))}
        </div>
      )}

      {/* 上傳按鈕 */}
      <div style={{ marginTop: 20 }}>
        <button
          onClick={() => actions.upload()}
          disabled={files.length === 0 || state.isUploading}
        >
          {state.isUploading ? `上傳中... ${state.progress}%` : '上傳全部'}
        </button>

        <button onClick={() => actions.reset()} style={{ marginLeft: 10 }}>
          清除全部
        </button>
      </div>
    </div>
  );
}

單檔上傳

import { useDropup } from '@samithahansaka/dropup';

function SingleFileUploader() {
  const { files, getDropProps, getInputProps } = useDropup({
    multiple: false, // 只允許一個檔案
    maxFiles: 1,
  });

  const file = files[0];

  return (
    <div {...getDropProps()} style={styles.dropzone}>
      <input {...getInputProps()} />
      {file ? (
        <p>已選擇：{file.name}</p>
      ) : (
        <p>將檔案拖放到此處</p>
      )}
    </div>
  );
}

const styles = {
  dropzone: {
    border: '2px dashed #ccc',
    borderRadius: 8,
    padding: 40,
    textAlign: 'center' as const,
  },
};

限制檔案類型

import { useDropup } from '@samithahansaka/dropup';

function ImageOnlyUploader() {
  const { files, state, getDropProps, getInputProps } = useDropup({
    accept: 'image/*',
    onValidationError: (errors) => {
      errors.forEach(({ file }) => {
        alert(`${file.name} 不是有效的圖片`);
      });
    },
  });

  return (
    <div
      {...getDropProps()}
      style={{
        ...styles.dropzone,
        borderColor: state.isDragReject ? 'red' : '#ccc',
        backgroundColor: state.isDragReject ? '#fff0f0' : 'white',
      }}
    >
      <input {...getInputProps()} />
      {state.isDragReject ? (
        <p style={{ color: 'red' }}>只接受圖片！</p>
      ) : (
        <p>將圖片拖放到此處</p>
      )}
    </div>
  );
}

使用回呼

import { useDropup } from '@samithahansaka/dropup';

function UploaderWithCallbacks() {
  const { files, actions, getDropProps, getInputProps } = useDropup({
    upload: { url: '/api/upload' },

    onFilesAdded: (newFiles) => {
      console.log('已新增檔案:', newFiles.map(f => f.name));
    },

    onUploadStart: (file) => {
      console.log('開始上傳:', file.name);
    },

    onUploadProgress: (file, progress) => {
      console.log(`${file.name}: ${progress}%`);
    },

    onUploadComplete: (file, response) => {
      console.log('完成:', file.name, file.uploadedUrl);
    },

    onUploadError: (file, error) => {
      console.error('失敗:', file.name, error.message);
    },

    onAllComplete: (allFiles) => {
      const successful = allFiles.filter(f => f.status === 'complete');
      console.log(`完成！${successful.length}/${allFiles.length} 個成功`);
    },
  });

  return (
    <div>
      <div {...getDropProps()} style={styles.dropzone}>
        <input {...getInputProps()} />
        <p>將檔案拖放到此處</p>
      </div>

      <button onClick={() => actions.upload()}>
        上傳（{files.length} 個檔案）
      </button>
    </div>
  );
}

獨立按鈕觸發

import { useDropup } from '@samithahansaka/dropup';

function SeparateButtonUploader() {
  const {
    files,
    openFileDialog,
    getDropProps,
    getInputProps,
  } = useDropup();

  return (
    <div>
      {/* 隱藏的拖放區域仍然接受拖放 */}
      <div
        {...getDropProps()}
        style={{
          border: '2px dashed #ccc',
          padding: 20,
          marginBottom: 10,
        }}
      >
        <input {...getInputProps()} />
        <p>將檔案拖放到此處</p>
      </div>

      {/* 獨立按鈕開啟檔案對話框 */}
      <button onClick={openFileDialog}>
        瀏覽檔案
      </button>

      {files.length > 0 && (
        <p>已選擇 {files.length} 個檔案</p>
      )}
    </div>
  );
}

自動上傳

import { useDropup } from '@samithahansaka/dropup';

function AutoUploader() {
  const { files, getDropProps, getInputProps } = useDropup({
    upload: { url: '/api/upload' },
    autoUpload: true, // 檔案新增時自動上傳
    onUploadComplete: (file) => {
      console.log('已上傳:', file.uploadedUrl);
    },
  });

  return (
    <div {...getDropProps()} style={styles.dropzone}>
      <input {...getInputProps()} />
      <p>將檔案拖放到此處 - 會自動上傳！</p>

      {files.map(file => (
        <div key={file.id}>
          {file.name}:
          {file.status === 'uploading' && ` ${file.progress}%`}
          {file.status === 'complete' && ' 完成！'}
          {file.status === 'error' && ` 錯誤: ${file.error?.message}`}
        </div>
      ))}
    </div>
  );
}

下一步

• 帶預覽 - 顯示圖片預覽
• 拖放區域 - 自訂樣式的拖放區域
• 分塊上傳 - 分塊上傳大檔案