@dtinsight/dt-utils/lib/toBase64/index.js

袋鼠云前端常用工具库

import { toBase64 as _toBase64 } from 'js-base64';
import getTypeOfValue from '../getTypeOfValue';
/**
 * 将值转换为Base64编码的字符串。
 *
 * @category 转换
 *
 * @param {File | Blob | string} value - 需要转换为Base64的值。支持File、string或其他原始类型
 * @returns {Promise<string | null | undefined>} 返回一个Promise，解析为Base64编码的字符串。如果输入为null/undefined则返回原始值
 *
 * @example
 * ```typescript
 * import { toBase64 } from 'dt-utils';
 *
 * // 将字符串转换为Base64
 * const str = 'Hello World';
 * const base64Str = await toBase64(str);
 * console.log(base64Str); // 'SGVsbG8gV29ybGQ='
 *
 * // 将文件转换为Base64
 * const file = new File(['file content'], 'test.txt');
 * const base64File = await toBase64(file);
 * console.log(base64File); // 'data:text/plain;base64,ZmlsZSBjb250ZW50'
 *
 * // 处理null值
 * const result = await toBase64(null);
 * console.log(result); // null
 * ```
 */
var toBase64 = function (value) {
    if (value === undefined || value === null)
        return Promise.resolve(value);
    return new Promise(function (resolve, reject) {
        if (['blob', 'file'].includes(getTypeOfValue(value))) {
            var reader_1 = new FileReader();
            reader_1.readAsDataURL(value);
            reader_1.onload = function () { return resolve(reader_1.result); };
            reader_1.onerror = function (error) { return reject(error); };
        }
        else {
            resolve(_toBase64(String(value)));
        }
    });
};
export default toBase64;