50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
import Compressor from "compressorjs";
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export function getExtName(fileName) {
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const index = fileName.lastIndexOf('.')
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return index !== -1 ? fileName.slice(index + 1).toLowerCase() : ''
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}
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export function formatBytes(bytes) {
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if (bytes === 0) return '0 B';
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const k = 1024;
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const units = ['B', 'KB', 'MB', 'GB', 'TB'];
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const i = Math.floor(Math.log(bytes) / Math.log(k));
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const size = (bytes / Math.pow(k, i)).toFixed(2);
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return `${size} ${units[i]}`;
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}
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export function fileToBase64(file) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.readAsDataURL(file);
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reader.onload = () => {
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const base64 = reader.result.split(',')[1];
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resolve(base64);
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};
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reader.onerror = reject;
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});
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}
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export function base64Size(base64String) {
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const padding = (base64String.match(/=*$/) || [''])[0].length;
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const base64Length = base64String.length;
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return (base64Length * 3) / 4 - padding;
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}
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export function compressImage(file, quality = 0.6) {
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return new Promise((resolve, reject) => {
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new Compressor(file, {
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quality,
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mimeType: 'image/jpeg',
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convertSize: 1024 * 1024,
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success(result) {
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resolve(result);
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},
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error(err) {
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reject(err);
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},
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});
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});
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}
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