@jasbel/wdio-html-nice-reporter/lib/encode.js

WebdriverIO report plugin. Create an HTML formatted report. compatible with webdriverio version 9

import { readFileSync } from 'fs';
export default function encode(url) {
    const fileBuf = readFileSync(url);
    return "data:image/png;base64," + fileBuf.toString('base64');
}