Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
activate.platform.californiatimes.com/caltimes/latimes/Bootstrap.js	300.0 s	87.1 KiB
cdn.speedcurve.com/js/lux.js?id=20201913	3600.0 s	11.3 KiB
libs.platform.latimes.com/newsletter-campaign-manager/latest.js	900.0 s	8.5 KiB
libs.platform.latimes.com/modalityjs/latest.js	900.0 s	3.3 KiB
www.latimes.com/styleguide/assets/icon-play-circle-outline-14x14-333333.svg	86400.0 s	2.5 KiB

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.177875] map[node:map[boundingRect:map[bottom:551 height:481 left:0 right:412 top:70 width:412] lhId:page-1-DIV nodeLabel:LATMG Streaming Now LA Times Media Group Streaming Produced by LA Times Studio… path:1,HTML,1,BODY,3,DIV,0,MAIN,1,DIV selector:body.page-body > div.page-ad-margins > main.page-main > div.column-container snippet:<div class="column-container two-column-container-7030 studios-stream-outer-container" data-split-mobile=""> type:node] score:0.177875]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:69.048 source:map[type:text value:[unattributed]]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG

nodeLabel: Los Angeles , CA - December 19: The Automated People Mover makes it way past a …

path: 1,HTML,1,BODY,3,DIV,0,MAIN,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,PICTURE,1,IMG

selector: div.promo-media > a.link > picture > img.image

snippet: <img class="image" alt="Los Angeles , CA - December 19: The Automated People Mover makes it way pa…" srcset="https://ca-times.brightspotcdn.com/dims4/default/15457c9/2147483647/strip/…" sizes="100vw" width="840" height="560" src="https://ca-times.brightspotcdn.com/dims4/default/e89ce8f/2147483647/strip/…" decoding="async" loading="lazy">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
activate.platform.californiatimes.com/caltimes/latimes/Bootstrap.js	87.1 KiB	1.4 s

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
Van Nuys, CA - October 30: Construction continues at a Department of Water and … `div.promo-media > a.link > picture > img.image`	/dims4/default/33ea445/2147483647/strip/true/crop/5815x38...	150.3 KiB	145.5 KiB
People drive their motorbikes past billboards showing the Iran's Supreme Leader… `div.promo-media > a.link > picture > img.image`	/dims4/default/35dc040/2147483647/strip/true/crop/8640x57...	63.1 KiB	59.2 KiB
CLB 500: Critical Loop's container-sized battery units can be transported on th… `div.promo-media > a.link > picture > img.image`	/dims4/default/71b509f/2147483647/strip/true/crop/7728x51...	40.6 KiB	38.0 KiB
FILE - A health worker administers a measles test on Fernando Tarin, of Seagrav… `div.promo-media > a.link > picture > img.image`	/dims4/default/fc95e8c/2147483647/strip/true/crop/2892x19...	36.3 KiB	34.1 KiB
Front Page of Today's L.A. Times `div.promo-media > a.link > picture > img.image`	/dims4/default/6592d52/2147483647/strip/true/crop/1200x12...	76.9 KiB	21.6 KiB
Hermosa Beach, CA - April 15: A bird flies near the Hermosa Beach Pier on Wedne… `div.promo-media > a.link > picture > img.image`	/dims4/default/f209cb0/2147483647/strip/true/crop/6000x40...	19.6 KiB	18.3 KiB
FILE - Rep. Jackie Speier, D-Calif., speaks during a news conference on Capitol… `div.promo-media > a.link > picture > img.image`	/dims4/default/6525223/2147483647/strip/true/crop/6000x40...	19.1 KiB	17.9 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 906 ms

URL	Time Spent
latimes.com/	906 ms
www.latimes.com/	0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
LATMG Streaming Now LA Times Media Group Streaming Produced by LA Times Studio… `body.page-body > div.page-ad-margins > main.page-main > div.column-container`	0.178

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 190 ms 43.6 KiB

URL	Transfer Size	Est Savings
.sr-only{height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px; … } …	20.1 KiB	16.9 KiB
/resource/0000016e-6bb5-d505-abef-fbb7e4420000/styleguide...	16.1 KiB	15.8 KiB
/resource/0000016e-6bb5-d505-abef-fbb7e4420000/styleguide...	11.4 KiB	10.8 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 370 ms 276.4 KiB

URL	Transfer Size	Est Savings
www.latimes.com/styleguide/8250-d5c05034.bundle.js	217.0 KiB	192.0 KiB
activate.platform.californiatimes.com/caltimes/latimes/Bootstrap.js	86.7 KiB	48.5 KiB
/resource/0000016e-6bb5-d505-abef-fbb7e4420000/styleguide...	50.3 KiB	35.9 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
www.latimes.com/	1.4 s	23 ms	5.7 ms
activate.platform.californiatimes.com/caltimes/latimes/Bootstrap.js	1.2 s	1.1 s	39 ms
Unattributable	482 ms	9.8 ms	0.0 ms
www.latimes.com/styleguide/8250-d5c05034.bundle.js	310 ms	219 ms	90 ms
/resource/0000016e-6bb5-d505-abef-fbb7e4420000/styleguide...	235 ms	112 ms	14 ms
/caltimes/latimes/code/25071cf7a5575dcc9563c2de75955ff2.j...	113 ms	101 ms	10 ms
/caltimes/latimes/code/7bef0406d3d28127dd256b08467e9033.j...	64 ms	54 ms	9.2 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	1.8 s
Style & Layout	916 ms
Other	594 ms
Parse HTML & CSS	301 ms
Rendering	191 ms
Script Parsing & Compilation	190 ms
Garbage Collection	55 ms

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Optimize DOM size

●Font display

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,408 KiB

●User Timing marks and measures 1 user timing

●Avoid long main-thread tasks 18 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 150 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 160 ms

○INP breakdown

○Avoid non-composited animations

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
FOR SUBSCRIBERS `div.promo-content > div.promo-title-container > div.relative > a.link`
FOR SUBSCRIBERS `div.promo-content > div.promo-title-container > div.relative > a.link`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●`<video>` elements contain a `<track>` element with `[kind="captions"]`

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Deprecated ARIA roles were not used

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○`[aria-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[role]`s have all required `[aria-*]` attributes

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○`[role]` values are valid

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

100

Best Practices

General

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
www.latimes.com/styleguide/8250-d5c05034.bundle.js

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid