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first-meaningful-paint.js
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first-meaningful-paint.js
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/**
* @license
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
// TODO(COMPAT): This is just a shell. Remove in future breaking release.
import {Audit} from '../audit.js';
import * as i18n from '../../lib/i18n/i18n.js';
const UIStrings = {
/** Description of the First Meaningful Paint (FMP) metric, which marks the time at which a majority of the content has been painted by the browser. This is displayed within a tooltip when the user hovers on the metric name to see more. No character length limits. The last sentence starting with 'Learn' becomes link text to additional documentation. */
description: 'First Meaningful Paint measures when the primary content of a page is ' +
'visible. [Learn more about the First Meaningful Paint metric](https://developer.chrome.com/docs/lighthouse/performance/first-meaningful-paint/).',
};
const str_ = i18n.createIcuMessageFn(import.meta.url, UIStrings);
class FirstMeaningfulPaint extends Audit {
/**
* @return {LH.Audit.Meta}
*/
static get meta() {
return {
id: 'first-meaningful-paint',
title: str_(i18n.UIStrings.firstMeaningfulPaintMetric),
description: str_(UIStrings.description),
scoreDisplayMode: Audit.SCORING_MODES.NUMERIC,
supportedModes: ['navigation'],
requiredArtifacts: ['traces', 'devtoolsLogs', 'GatherContext', 'URL'],
};
}
/**
* @return {Promise<LH.Audit.Product>}
*/
static async audit() {
return {
score: null,
notApplicable: true,
};
}
}
export default FirstMeaningfulPaint;
export {UIStrings};