@planjs/utils/es/blob/dataURL-to-blob.js

🔧 Common tools collection

import { REG_DATA_URL } from '../regex_constant';
import { ensure } from '../debug';
/**
 * base64 转换成 Blob
 * @param dataUrl
 * @return {Blob}
 */

function dataURLToBlob(dataUrl) {
  var _match;

  ensure(!REG_DATA_URL.test(dataUrl), "".concat(dataUrl, " is not a data url"));
  var arr = dataUrl.split(',');
  var mime = (_match = arr[0].match(/:(.*?);/)) === null || _match === void 0 ? void 0 : _match[1];
  var bStr = atob(arr[1]);
  var n = bStr.length;
  var unit8Array = new Uint8Array(n);

  while (n--) {
    unit8Array[n] = bStr.charCodeAt(n);
  }

  return new Blob([unit8Array], {
    type: mime
  });
}

export default dataURLToBlob;