sll-utils/src/util.ts

一个js处理工具

export const downLoadFile =  (response:any,fileName: string, type: string = 'docx') => {
  try {
    let _type: string = ''
    switch (type) {
      case 'pdf':
        _type = 'application/pdf';
        break
      case 'xls':
        _type = 'application/vnd.ms-excel';
        break
      case 'xlsx':
        _type = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
        break
      case 'doc':
        _type = 'application/msword';
        break
      case 'docx':
        _type = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
        break
      case 'txt':
        _type = 'text/plain';
        break
      case 'svg':
        _type = 'image/svg+xml';
        break
      case 'jpg':
      case 'jpeg':
        _type = 'image/jpeg';
        break
      case 'png':
        _type = 'image/png';
        break
      default:
        _type = 'application/octet-stream';
        break
    }
    // 创建一个 URL 对象
    const url = window.URL.createObjectURL(new Blob([response], {
      type: _type
    }));
    
    const link = document.createElement('a');
    link.href = url;
    link.setAttribute('download', `${fileName}.${type}`); // 设置下载文件的名称
    document.body.appendChild(link);
    link.click();

    // 释放 URL 对象
    window.URL.revokeObjectURL(url);
  } catch (error) {
    console.error('下载文件失败:', error);
  }
};

/**
 *
 * @param value 得到数据类型
 */
export function getType(value: any) {
  const type = Object.prototype.toString.call(value)
  return type.replace(/(\[)|(\])/g, '').split(' ')[1]
}
// blob 转 Base64
export function blobToBase64(blob: any) {
  return new Promise((resolve, reject) => {
    const reader: any = new FileReader();
    reader.onload = () => resolve(reader.result.split(',')[1]);
    reader.onerror = reject;
    reader.readAsDataURL(blob);
  });
}