DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
93 lines
3.7 KiB
Text
93 lines
3.7 KiB
Text
/**
|
|
* @license
|
|
* Copyright 2018 Google LLC
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
/*
|
|
* @fileoverview Audit a page to ensure that videos are used instead of animated gifs
|
|
*/
|
|
|
|
|
|
import {NetworkRequest} from '../../lib/network-request.js';
|
|
import {ByteEfficiencyAudit} from './byte-efficiency-audit.js';
|
|
import * as i18n from '../../lib/i18n/i18n.js';
|
|
|
|
const UIStrings = {
|
|
/** Imperative title of a Lighthouse audit that tells the user to use video formats rather than animated GIFs, which are wasteful. This is displayed in a list of audit titles that Lighthouse generates. */
|
|
title: 'Use video formats for animated content',
|
|
/** Description of a Lighthouse audit that tells the user *why* they should use video instead of GIF format for delivering animated content. This is displayed after a user expands the section to see more. No character length limits. The last sentence starting with 'Learn' becomes link text to additional documentation. */
|
|
description: 'Large GIFs are inefficient for delivering animated content. Consider using ' +
|
|
'MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF to save ' +
|
|
'network bytes. [Learn more about efficient video formats](https://developer.chrome.com/docs/lighthouse/performance/efficient-animated-content/)',
|
|
};
|
|
|
|
const str_ = i18n.createIcuMessageFn(import.meta.url, UIStrings);
|
|
|
|
// If GIFs are above this size, we'll flag them
|
|
// See https://github.com/GoogleChrome/lighthouse/pull/4885#discussion_r178406623 and https://github.com/GoogleChrome/lighthouse/issues/4696#issuecomment-370979920
|
|
const GIF_BYTE_THRESHOLD = 100 * 1024;
|
|
|
|
class EfficientAnimatedContent extends ByteEfficiencyAudit {
|
|
/**
|
|
* @return {LH.Audit.Meta}
|
|
*/
|
|
static get meta() {
|
|
return {
|
|
id: 'efficient-animated-content',
|
|
title: str_(UIStrings.title),
|
|
description: str_(UIStrings.description),
|
|
scoreDisplayMode: ByteEfficiencyAudit.SCORING_MODES.METRIC_SAVINGS,
|
|
guidanceLevel: 3,
|
|
requiredArtifacts: ['DevtoolsLog', 'Trace', 'GatherContext', 'URL', 'SourceMaps'],
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Calculate rough savings percentage based on 1000 real gifs transcoded to video
|
|
* @param {number} bytes
|
|
* @return {number} rough savings percentage
|
|
* @see https://github.com/GoogleChrome/lighthouse/issues/4696#issuecomment-380296510 bytes
|
|
*/
|
|
static getPercentSavings(bytes) {
|
|
return Math.round((29.1 * Math.log10(bytes) - 100.7)) / 100;
|
|
}
|
|
|
|
/**
|
|
* @param {LH.Artifacts} artifacts
|
|
* @param {Array<LH.Artifacts.NetworkRequest>} networkRecords
|
|
* @return {import('./byte-efficiency-audit.js').ByteEfficiencyProduct}
|
|
*/
|
|
static audit_(artifacts, networkRecords) {
|
|
const unoptimizedContent = networkRecords.filter(
|
|
record => record.mimeType === 'image/gif' &&
|
|
record.resourceType === NetworkRequest.TYPES.Image &&
|
|
(record.resourceSize || 0) > GIF_BYTE_THRESHOLD
|
|
);
|
|
|
|
/** @type {Array<{url: string, totalBytes: number, wastedBytes: number}>}*/
|
|
const items = unoptimizedContent.map(record => {
|
|
const resourceSize = record.resourceSize || 0;
|
|
return {
|
|
url: record.url,
|
|
totalBytes: resourceSize,
|
|
wastedBytes: Math.round(resourceSize *
|
|
EfficientAnimatedContent.getPercentSavings(resourceSize)),
|
|
};
|
|
});
|
|
|
|
/** @type {LH.Audit.Details.Opportunity['headings']} */
|
|
const headings = [
|
|
{key: 'url', valueType: 'url', label: str_(i18n.UIStrings.columnURL)},
|
|
{key: 'totalBytes', valueType: 'bytes', label: str_(i18n.UIStrings.columnResourceSize)},
|
|
{key: 'wastedBytes', valueType: 'bytes', label: str_(i18n.UIStrings.columnWastedBytes)},
|
|
];
|
|
|
|
return {
|
|
items,
|
|
headings,
|
|
};
|
|
}
|
|
}
|
|
|
|
export default EfficientAnimatedContent;
|
|
export {UIStrings};
|