Puppeteer で FirstMeaningfulPaint を取得する - Qiitaconst puppeteer = require('puppeteer') async function getPerformanceMetrics(page) { const { metrics } = await page._client.send('Performance.getMetrics') return metrics.reduce((acc, i) => ({ ...acc, [i.name]: i.value }), {}) } async function waitForFMP(page) { let doneMet = null while (true) { const data = await getPerformanceMetrics(page) if (data.FirstMeaningfulPaint !== 0) { doneMet = data brea
