/**
 * 将dataURL转换为Blob对象
 *
 * @param {string} dataURL - 包含base64编码数据的dataURL字符串
 * @returns {Blob} - 返回对应的Blob对象
 * @example
 * const URI = 'data:image/svg+xml;base64,PHN2ZyB2aWV3Qm94PSIwIDAgMTAyNCAxMDI0IiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyMDAiIGhlaWdodD0iMjAwIj48ZGVmcz48c3R5bGUvPjwvZGVmcz48cGF0aCBkPSJNOTU5LjQzNiAyNDMuNUwzNzcuNDEzIDg3MC4yNyA2NC4wMiA0NjcuMzQ0bDExNC43MjctOTcuOTMgMTk4LjY2NiAyMDcuMDYgNDkyLjQ4Mi00MjIuNTEgODkuNTQgODkuNTM3em0wIDAiIGZpbGw9IiM0M2E5ZjEiLz48L3N2Zz4=';
 *
 * dataURLToBlob(URI);
 * // => Blob {size: 248, type: "image/svg+xml"}
 */
export declare function dataURLToBlob(dataURL: string): Blob;