v8.dev | source code of v8.dev , the official website | Web Site library
kandi X-RAY | v8.dev Summary
kandi X-RAY | v8.dev Summary
This repository hosts the source code of v8.dev, the official website of the V8 project.
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Top functions reviewed by kandi - BETA
- Creates a useful help .
- Expand the feature support in the browser .
- Maps an environmentId to the environmentId .
v8.dev Key Features
v8.dev Examples and Code Snippets
Community Discussions
Trending Discussions on v8.dev
QUESTION
The post https://v8.dev/blog/fast-properties mentions there are three kinds of properties. How do I find out which one a property is?
I am expecting answers with a v8 native syntax function or a devtool feature.
...ANSWER
Answered 2022-Apr-10 at 12:02Here is long story short explanation for the difference between fast and slow properties. When an object is created in JS, a hidden class is attached to it. When a property is added to the object, “class transition” happens (the old hidden class switches to a new hidden class with the new property in it)
When V8 sees a class constructor function is declared, it creates a hidden class ex: C0. Now, when V8 sees on the next line a property being added, in our example: name it updates the C0 with the new property and switches from C0 to a new hidden class say C1, then it sees next property: age and switches to C2.
Adding new properties dynamically to the 2 person objects in this example is not an optimized solution because the order in which the two new properties (likes and dislikes) are instantiated is different. A different order results in the creation of two different hidden classes instead of sharing a common hidden class.
So: we create C0 for the constructor function person. It transits to C1 for name and then C2 for age. For person1, when it sees a property "likes" and it transits to C3a and for "dislikes" to C4a. BUT, for person2 V8 first sees the property "dislikes" being added to it and therefore instead of sharing the hidden class C3a, it creates a new hidden class C3b. It then creates a new hidden class for property likes say C4b.
Since the two objects do not share the hidden classes (when they could have shared them); the access to the properties of the object is slow because V8 is now not able to make use of inline caching. If the two had shared the hidden class, V8 would have used inline caching for faster access. So in the example below those are slow properties. Would have been fast if order was the same.
Hope this helps a bit.
QUESTION
I'm new to Angular and try to install ngx-admin template but I got these errors. how to fix these errors?
...ANSWER
Answered 2022-Mar-26 at 16:24To fix node-sass issue, change "node-sass": "xx.xx.x"
to "sass": "^1.49.0"
in the package.json
file in the root of the project. Then run npm i
to install new packages.
Though node-sass
may be not the only issue with ngx-admin to make it run nowadays.
QUESTION
Trying to install chromedriver with npm on a Mac with an M1 processor and getting "Only Mac 64 bits supported.":
...ANSWER
Answered 2022-Mar-24 at 01:50I had the same problem. I got it working after I used chromedriver
version 87.0.1 or higher.
QUESTION
I am not able to install any npm packages as I get the following error on my M1 Mac mini
...ANSWER
Answered 2022-Mar-23 at 18:30import sys; print "%s.%s.%s"
That's some good old Python 2 notation if I ever saw some :)
As @ElapsedSoul mentioned. macOS 12.3 removed the Python 2 that came by default for all these years. Therefore, I would personally recommend for others not to upgrade to 12.3 if you need Python 2 until you find an alternative solution.
Some possible alternatives include the following:
Option 0: Reinstall Python 2 via HomebrewHomebrew unfortunately got rid of Python 2 a long time ago. There are however some workarounds to try and get it to work: How to reinstall python@2 from Homebrew?.
Option 1: Use pyenvI haven't tested this, so it might not work. But if it does, this is likely the best solution for your needs. From the following:
QUESTION
I am trying to set up my first Gatsby website. After running npm install -g gatsby-cli
, I do gatsby new gatsby-starter-hello-world https://github.com/gatsbyjs/gatsby-starter-hello-world
(just like the website https://www.gatsbyjs.com/starters/gatsbyjs/gatsby-starter-hello-world/ says) to download the hello world starter. When I run gatsby develop
I see the following error
ANSWER
Answered 2022-Mar-21 at 06:34As has been commented in the comments section, the issue has been solved by moving the project folder outside the OneDrive directory.
Because it's a synchronized cloud folder, as soon as you install/add/delete/update anything, it's being updated in the OneDrive cloud so the file/folder it's being used in the background and potentially unreachable. If at this time you try to develop the project (gatsby develop
or gatsby build
) and the file is being used, you won't be able to run it.
I don't think it's a good practice to use a cloud folder because the amount of data synchronized (mainly because of the node_modules
) it's something to care about (it's also ignored in the .gitignore
for a reason) so moving it to any other folder outside the OneDrive directory should be enough to run your project because the rest of global dependencies, according to your logs, were successfully installed.
QUESTION
When I try to install serverless framework I get the following deprecations. I've run an npm install on each individual package. Npm says the package installs worked, but it doesn't change the sls output. I reinstalled Windows thinking I may have changed a config file at some point, still the exact some output even after reinstall. I'm running Windows 10. I am stuck and any help would be appreciated.
C:\Users\User>npm install -g serverless
npm WARN deprecated querystring@0.2.1: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated formidable@1.2.6: Please upgrade to latest, formidable@v2 or formidable@v3! Check these notes
npm WARN deprecated querystring@0.2.0: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated querystring@0.2.0: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated uuid@3.3.2: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math-random for details.
npm WARN deprecated superagent@3.8.3: Please upgrade to v7.0.2+ of superagent. We have fixed numerous issues with streams, form-data, attach(), filesystem errors not bubbling up (ENOENT on attach()), and all tests are now passing. See the releases tab for more information at https://github.com/visionmedia/superagent/releases.
...ANSWER
Answered 2022-Mar-15 at 20:53these deprecations are related to the libraries version that are used directly by serverless
. You can expect them to sooner or later be addressed on that library level but until that, you can use it without worries (unless you see the explicit security warnings, but that's not the case at the moment).
QUESTION
I tried to install gatsby-cil on WLS2 with npm and failed.
here is the error message
...ANSWER
Answered 2022-Mar-14 at 05:56Try:
QUESTION
I am trying to deploy a website on vercel from my command line of VSCode by using the command:
...ANSWER
Answered 2022-Mar-07 at 16:03There are 2 ways to fix this problem.
- It seems that you are importing modules to some js files but not using them so avoid using unnecessary imports and only import a module when you are using it on the page. If you are not using it then avoid importing that module to the js file.
Install the following module
npm install --save-dev eslint-plugin-react.
(for developers using NPM) oryarn add --dev eslint-plugin-react.
(for developers using Yarn)Then, in your
.eslintrc.json
, under extends, include the following plugin:
QUESTION
I'm trying to create a new project with typescript template using npx like this
...ANSWER
Answered 2022-Feb-26 at 13:19In my case upgrading the node version solved the issue.
QUESTION
so i was trying to install my npm packages from my project (package.json).
(The package got pulled from my github repo via git pull)
But when i tried to run npm i
i get the error below:
Info:
- Linux Debian 10
- Node v17.5.0
- npm 8.4.1
Full Error:
...ANSWER
Answered 2022-Feb-18 at 14:29As you are using node version 17, I can see that this problem happens,
Downgrading to node version 16 will solve the problem(using nvm):
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Install v8.dev
Clone the repository and cd into it.
Install and use the expected Node.js version: nvm use
Install dependencies: npm install
npm run build builds the site into dist.
npm run watch builds the site into dist and watches for changes.
npm start kicks off a local HTTP server.
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