File size: 950 Bytes
7aec436
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
/**

 * @param {Blob} o

 * @returns {Promise<ArrayBuffer>}

 */
export const readAsArrayBuffer = (o) => new Promise((resolve, reject) => {
  const fr = new FileReader();
  fr.onload = () => resolve(fr.result);
  fr.onerror = () => reject(new Error(`Cannot read as array buffer: ${fr.error}`));
  fr.readAsArrayBuffer(o);
});

/**

 * @param {Blob} o

 * @returns {Promise<string>}

 */
export const readAsURL = (o) => new Promise((resolve, reject) => {
  const fr = new FileReader();
  fr.onload = () => resolve(fr.result);
  fr.onerror = () => reject(new Error(`Cannot read as URL: ${fr.error}`));
  fr.readAsDataURL(o);
});

/**

 * @param {Blob} o

 * @returns {Promise<string>}

 */
export const readAsText = (o) => new Promise((resolve, reject) => {
  const fr = new FileReader();
  fr.onload = () => resolve(fr.result);
  fr.onerror = () => reject(new Error(`Cannot read as text: ${fr.error}`));
  fr.readAsText(o);
});