lighthouse | Automated auditing , performance metrics | Performance Testing library
kandi X-RAY | lighthouse Summary
kandi X-RAY | lighthouse Summary
Lighthouse analyzes web apps and web pages, collecting modern performance metrics and insights on developer best practices.
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Top functions reviewed by kandi - BETA
- Get LONG flags .
- Create the topbar component component
- Converts the trace timestamps array to a trace event stream .
- build bundle bundle
- Determines the number of tokens for a given content
- Run the config .
- Creates a pw gauge component
- Compiles the template names of elements .
- Run a test in a page .
- Initialize the sender .
lighthouse Key Features
lighthouse Examples and Code Snippets
Lines of Code : 111License : Strong Copyleft (CC BY-SA 4.0)
Copyvar mobileData = fetchDataFromPSI('mobile');
var desktopData = fetchDataFromPSI('desktop');
function pageSpeedApiEndpointUrl(strategy) {
const apiBaseUrl = 'https://www.googleapis.com/pagespeedonline/v5/runPagespeed';
const websiteHomdef urlEncode(text):
result = ''
for i in text:
if i == ' ':
i = '%20'
result += i
else:
result += i
return result
print(urlEncode("Lighthouse Labs"))
print(urlEncode(" Lighconst fs = require('fs');
const util = require('util');
const readFile = util.promisify(fs.readFile);
async function getUrlsFromFile {
const contents = await readFile('urls.txt');
return lines.toString().split('\n')
}
async function set srcFolder to "/Users/user/Documents/Lighthouse/"
set srcFile to srcFolder & "urls.txt"
set outputPath to quoted form of (srcFolder & "LighthouseReports.csv")
set lns to paragraphs of (read file srcFile as «class utf8»)
repea# ...
jobs:
include:
# other stages...
- stage: lighthouse
script:
- yarn build
- lhci autorun --upload.target=temporary-public-storage
addons:
chrome: stable
docker run --rm --name lighthouse -it \
-v $PWD/test-results/lighthouse:/home/chrome/reports \
-v $PWD/lighthouse:/lighthouse \
--cap-add=SYS_ADMIN femtopixel/google-lighthouse \
$full_url \
--config-path=/lighthouse/config/custo// This how I call lighthouse programmatically
const lhr = await lighthouse(url, config.lighthouseFlags, config.lighthouseConfigs);
var url = "https://www.example.com";
var config = {};
// The 2nd parameter in the lighthouse function is sCommunity Discussions
Trending Discussions on lighthouse
QUESTION
I am new to coding, my code moves when I change the size of the browser window (divs and pictures start moving up and down and as a result my web page can only be correctly visible in one window size.
What should I change to adapt the page to different screen sizes?
Please let me know if I have some other mistakes in the code as well.
Here is the code: https://codepen.io/btb8293/pen/WNdYrZj
...ANSWER
Answered 2022-Apr-15 at 18:37You can use Media Queries to target different device viewports and apply specific styling. You can read more about responsive styling and viewports here and here
QUESTION
I am trying to implement custom audits using the lighthouse library lighthouse and executing some Javascript commands within the Gatherer I get the following error:
...ANSWER
Answered 2022-Apr-04 at 07:27There is already an artifact that collects all font information on a page: https://github.com/GoogleChrome/lighthouse/blob/master/types/artifacts.d.ts#L139
As for the actual error, you'd need to write a more complex function that you'd pass to evaluate to process the DOM and return only the data you want. If you write anything more than a single-line expression I suggest using driver.evaluate instead (see the Lighthouse repo for examples).
QUESTION
I want to create a table that looks like this:
So far I have a table I created to get the value counts but I need help with creating a table that calculates the total value of row 0 and 1. I'm using this dataset: https://github.com/fivethirtyeight/data/tree/master/bob-ross
Code:
...ANSWER
Answered 2022-Apr-02 at 03:26IIUC,
QUESTION
I'm following the documentation for seo of https://nuxtjs.org/docs/features/meta-tags-seo/ in a netifly hosted nuxt project wwww.estudiosclaw.com
the problem when i run the lighthouse checker in chrome it says the meta description is empty ( apeears in the head of the html ).
when i retieve a especific post directly all checks are red.
in google search typing "estudios claw" only appears the navbar titles.
I have set all my meta description individually depending the page.
example:
...ANSWER
Answered 2022-Mar-22 at 14:38You need to generate a meta tag like . Your code would not do that. The example code you linked to shows that both the hid and the name should be "description" (literally.) You appear to be putting the page title into the name attribute of the tag, which is not correct. Correct code should be more like:
QUESTION
I would like to count the files in folder with Excel VBA.
The speed very important for me now, so first I list all files (from folders and subfolders) to "A" column, and I would like to go thru on all lines and count how many files in the folder.
My list from "A" column:
...ANSWER
Answered 2022-Mar-10 at 11:11You don't need VBA for this, standard Excel functions can compute these counts.
Column B is used to extract the filename from the path:
QUESTION
Yesterday I updated SvelteKit version from v1.0.0-next.241 to v1.0.0-next.287, and since I cannot fetch data in the component. I get an error message: Unexpected token < in JSON at position 0.
Error occurs when I try to parse response: await response.json()
Did anything change regarding fetching data since version 241? And how to do it now?
index.svelte
...ANSWER
Answered 2022-Mar-04 at 07:55You have to add accept headers as well to indicate to the server what you accept as a return, by default this is html.
QUESTION
My Company Hired someone outside on up upwork for cheap to optimize for lighthouse score. He asked me to review what they did and I'm trying to figure out exactly what they did. Our scores definitely went up but it looks like a special set of rules for lighthouse-chrome and GTMetrix agents that ignore certain things in order to get a better score.
Can anyone decipher this and tell me if this is just a hack or legit?
...ANSWER
Answered 2022-Mar-02 at 05:39This appears to be a scam.
Searching for that code, I can find similar code here and here.
The code is intentionally difficult to read, but the idea appears to be that when it detects that page speed is being measured (seemingly by checking the User-Agent string), it loads an empty page; which will obviously be faster. I'm not sure what it's doing with script and link tags, so this variant might be a little different, but that's what they're reporting on Shopify.
I would be extremely suspicious based on that first line alone though. Any time you have strings with information that's encoded oddly embedded in the string, there's the potential that it's being used to hide information. Here, they appear to be trying to hide the fact that they're checking the user-agent string for 'Chrome-Lighthouse' ('\x43\x68\x72\x6F\x6D\x65\x2D\x4C\x69\x67\x68\x74\x68\x6F\x75\x73\x65'), but it could have also been code that stole session cookies, or replaced links on pages to point to malicious sites. Be very cautious of code that appears to be evading human or other static detection.
QUESTION
Chrome Lighthouse tells me that I could save like 90% of the transfered bytes by compressing my api route
How could I modify this code (api/something.js) to enable compression?
...ANSWER
Answered 2022-Feb-23 at 11:58If you make the server middleware extend Express, then you can use the compression middleware to handle compression of HTTP responses:
For example:
QUESTION
I wanted to make a lighthouse test using cypress-audit, but after doing everything they said on https://www.npmjs.com/package/cypress-audit it doesn't work. I can use "cy.lighthouse()" in the cypress/support/commands.js, but not in files with extension like .spec.ts or .ts ( i get "Property 'lighthouse' does not exist on type 'cy & EventEmitter'.ts(2339)" error ). I already tried to find any solutions on the internet, but nothing worked.
package.json:
...ANSWER
Answered 2022-Jan-26 at 11:12There are some type defs in the cypress-audit package that should be kicking in. Perhaps it's the mixture of ts and js files?
Try adding these to /cypress/support/index.ts
QUESTION
I have an HTML layout engine that has a common component that can switch between ol HTML, ul HTML, and table HTML structure
...ANSWER
Answered 2021-Dec-09 at 00:37I don't think the
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