Top 10 Examples of "lighthouse in functional component" in JavaScript
Dive into secure and efficient coding practices with our curated list of the top 10 examples showcasing 'lighthouse' in functional components in JavaScript. Our advanced machine learning engine meticulously scans each line of code, cross-referencing millions of open source libraries to ensure your implementation is not just functional, but also robust and secure. Elevate your React applications to new heights by mastering the art of handling side effects, API calls, and asynchronous operations with confidence and precision.
init() {
this.launcher = new ChromeLauncher({
port: 9222,
autoSelectChrome: true, // False to manually select which Chrome install.
additionalFlags: ['--headless']
});
return fromPromise(this.launcher.run())
.catch(err => {
// console.log(err);
return this.stop();
});
}static async audit(artifacts, context) {
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const metricData = {
devtoolsLog,
trace,
settings: context.settings,
};
const {timing} = await ComputedAdRenderTime.request(metricData, context);
if (!(timing > 0)) { // Handle NaN, etc.
context.LighthouseRunWarnings.push(runWarning.NoAdRendered);
return auditNotApplicable.NoAdRendered;
}
const scoreOptions =
context.options[global.isLightrider ? 'default' : 'lightrider'];
return {static async audit(artifacts, context) {
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const unfilteredNetworkRecords =
await NetworkRecords.request(devtoolsLog, context);
if (!unfilteredNetworkRecords.length) {
return auditNotApplicable.NoRecords;
}
const mainResource =
await MainResource.request({URL: artifacts.URL, devtoolsLog}, context);
// Filter out requests without responses, image responses, and responses
// taking less than 50ms.
const networkRecords = unfilteredNetworkRecords
.filter(isPossibleBid)
.filter((r) => r.frameId == mainResource.frameId);
// We filter for URLs that are related to header bidding.static async audit(artifacts, context) {
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const metricData = {trace, devtoolsLog, settings: context.settings};
const {timing} = await ComputedBidRequestTime.request(metricData, context);
if (!(timing > 0)) { // Handle NaN, etc.
return auditNotApplicable.NoBids;
}
return {
numericValue: timing * 1e-3,
score: Audit.computeLogNormalScore(
timing,
context.options.scorePODR,
context.options.scoreMedian
),
displayValue: str_(UIStrings.displayValue, {timeInMs: timing}),static async audit(artifacts, context) {
// Artifacts requested in `requiredArtifacts` above are passed to your audit.
// See the "API -> Plugin Audits" section below for what artifacts are available.
try {
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const requests = await NetworkRecords.request(devtoolsLog, context);
let domains = new Set()
requests.forEach(req => {
domains.add(new URL(req.url).host)
})
// the spread syntax turns our deduped set into an array, then makes sure they're long enough to check
const domainArray = [...domains].filter(domain => domain.length > 2)
const checkResults = await Greencheck.checkDomains(domainArray)
const greyDomainResults = checkResults.greenChecks.filter(res => res.green == false)
const tableDetails = GreenAudit.convertToTableDetails(checkResults.greenChecks)
return {
score: checkResults.score,static async audit(artifacts, context) {
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const networkRecords = await NetworkRecords.request(devtoolsLog, context);
const tag = networkRecords.find((req) => isAdTag(new URL(req.url)));
if (!tag) {
return auditNotApplicable.NoTag;
}
/** @type {Map} */
const timingsByRecord =
await getTimingsByRecord(trace, devtoolsLog, context);
// NOTE(warrengm): Ideally we would key be requestId here but LinkElements
// don't have request IDs.
/** @type {Set} */
const blockingElementUrls = new Set();
for (const link of artifacts.LinkElements) {
// TODO(warrengm): Check for media queries? Or is the network filter belowstatic async audit(artifacts, context) {
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const metricData = {trace, devtoolsLog, settings: context.settings};
const {timing} = await ComputedBidRequestTime.request(metricData, context);
if (!(timing > 0)) { // Handle NaN, etc.
return auditNotApplicable.NoBids;
}
return {
numericValue: timing * 1e-3,
score: Audit.computeLogNormalScore(
timing,
context.options.scorePODR,
context.options.scoreMedian
),
displayValue: str_(UIStrings.displayValue, {timeInMs: timing}),
};static async audit(artifacts, context) {
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const networkRecords = await NetworkRecords.request(devtoolsLog, context);
/** @type {LH.Artifacts.TaskNode[]} */ let mainThreadTasks = [];
try {
mainThreadTasks = await MainThreadTasks.request(trace, context);
} catch (e) {
// Ignore tracing errors.
}
const {timings} = await TraceOfTab.request(trace, context);
const timerEvents =
trace.traceEvents.filter((t) => t.name.startsWith('Timer'));
const pageStartTime = getPageStartTime(networkRecords);
const blockingRequests =
await computeAdRequestWaterfall(trace, devtoolsLog, context);
if (!blockingRequests.length) {
return auditNotApplicable.NoAdRelatedReq;static async audit(artifacts, context) {
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const unfilteredNetworkRecords =
await NetworkRecords.request(devtoolsLog, context);
if (!unfilteredNetworkRecords.length) {
return auditNotApplicable.NoRecords;
}
const mainResource =
await MainResource.request({URL: artifacts.URL, devtoolsLog}, context);
// Filter out requests without responses, image responses, and responses
// taking less than 50ms.
const networkRecords = unfilteredNetworkRecords
.filter(isPossibleBid)
.filter((r) => r.frameId == mainResource.frameId);
// We filter for URLs that are related to header bidding.
// Then we create shallow copies of each record. This is because the records
// by default have circular structure, which causes an error to be thrownstatic async audit(artifacts, context) {
const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
const trace = artifacts.traces[Audit.DEFAULT_PASS];
const networkRecords = await NetworkRecords.request(devtoolsLog, context);
const tag = networkRecords.find((req) => isAdTag(new URL(req.url)));
if (!tag) {
return auditNotApplicable.NoTag;
}
/** @type {Map} */
const timingsByRecord =
await getTimingsByRecord(trace, devtoolsLog, context);
// NOTE(warrengm): Ideally we would key be requestId here but LinkElements
// don't have request IDs.
/** @type {Set} */
const blockingElementUrls = new Set();
for (const link of artifacts.LinkElements) {
// TODO(warrengm): Check for media queries? Or is the network filter below
// sufficient?