barcode-c52df.web.app

Barcode-c52df.web.app Site Title

Example

Barcode-c52df.web.app Test Results

Barcode-c52df.web.app Mobile Performance: 69/100

Quick overview:

Opportunities

These suggestions can help your page load faster. They don't directly affect the Performance score.

Eliminate render-blocking resources. Potential savings of 1,370 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn more.

Remove unused JavaScript. Potential savings of 109 KiB

Remove unused JavaScript to reduce bytes consumed by network activity. Learn more.

Diagnostics

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

Avoid `document.write()`

For users on slow connections, external scripts dynamically injected via `document.write()` can delay page load by tens of seconds. Learn more.

Reduce the impact of third-party code

Third-party code blocked the main thread for 480 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading. Learn more.

Minimizes main-thread work

2.0 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn more

JavaScript execution time

1.2 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn more.

Avoid chaining critical requests

1 chain found

The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. Learn more.

Largest Contentful Paint element

1 element found

This is the largest contentful element painted within the viewport. Learn More

Keep request counts low and transfer sizes small

16 requests • 303 KiB

To set budgets for the quantity and size of page resources, add a budget.json file. Learn more.

Avoid long main-thread tasks

8 long tasks found

Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay. Learn more

Barcode-c52df.web.app Mobile SEO: 91/100

Quick overview:

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Document does not have a meta description

Meta descriptions may be included in search results to concisely summarize page content. Learn more.

Barcode-c52df.web.app Mobile Best Practices: 71/100

Quick overview:

Trust and Safety

Links to cross-origin destinations are unsafe

Add `rel="noopener"` or `rel="noreferrer"` to any external links to improve performance and prevent security vulnerabilities. Learn more.

Includes front-end JavaScript libraries with known security vulnerabilities

4 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers. Learn more.

Does not use HTTPS

1 insecure request found

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being servedover HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more.

General

Browser errors were logged to the console

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more

Barcode-c52df.web.app Mobile Progressive Web App: 46/100

Quick overview:

PWA Optimized

Manifest doesn't have a maskable icon

A maskable icon ensures that the image fills the entire shape without being letterboxed when installing the app on a device. Learn more. No manifest was fetched

Does not provide a valid `apple-touch-icon`

For ideal appearance on iOS when users add a progressive web app to the home screen, define an `apple-touch-icon`. It must point to a non-transparent 192px (or 180px) square PNG. Learn More.

Is not configured for a custom splash screen

A themed splash screen ensures a high-quality experience when users launch your app from their homescreens. Learn more. Failures: No manifest was fetched.

Does not set a theme color for the address bar.

The browser address bar can be themed to match your site. Learn more. Failures: No manifest was fetched, No `<meta name="theme-color">` tag found.

Fast and reliable

Current page does not respond with a 200 when offline

If you're building a Progressive Web App, consider using a service worker so that your app can work offline. Learn more.

`start_url` does not respond with a 200 when offline

A service worker enables your web app to be reliable in unpredictable network conditions. Learn more. No usable web app manifest found on page.

Installable

Web app manifest does not meet the installability requirements

Browsers can proactively prompt users to add your app to their homescreen, which can lead to higher engagement. Learn more. Failures: No manifest was fetched.

Does not use HTTPS

1 insecure request found

Does not register a service worker that controls page and `start_url`

The service worker is the technology that enables your app to use many Progressive Web App features, such as offline, add to homescreen, and push notifications. Learn more.

Barcode-c52df.web.app Mobile Accessibility: 82/100

Quick overview:

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Form elements do not have associated labels

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

`<html>` element does not have a `[lang]` attribute

If a page doesn't specify a lang attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more.

Navigation

These are opportunities to improve keyboard navigation in your application.

The page does not contain a heading, skip link, or landmark region

Adding ways to bypass repetitive content lets keyboard users navigate the page more efficiently. Learn more.

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