JavaScript
JavaScript (JS) is a lightweight interpreted or JIT-compiled programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB and Adobe Acrobat. JavaScript is a prototype-based, multi-paradigm, dynamic language, supporting object-oriented, imperative, and declarative (e.g. functional programming) styles.
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What problem does this feature solve?
I just spent way too long debugging something really weird until I realized I accidentally wrote :v-if instead of v-if.
A warning when wrongly using shorthands like : on "native" vue attributes could prevent this bad experience easily.
What does the proposed API look like?
:v-if="foo"
--> console.warn("You specified v-bind:/ v-on:
In What about &&? section we have the following code.
function foo() {
console.log( a );
}
var a = 42;
a && foo(); // 42
result in comment should indicate that foo was called. but in fact we would get same result of "42" if first operand had been called (like in || operator). i think results of a and foo() should be different to make the example be clearer.
The max-classes-per-file rule is enabled in rules/best-practices.js but there is no mention of this requirement in the docs. If this is a best practice, I'd like to know why.
Consider the following snippet run in the main process where one wants to listen for "will-prevent-default" events and after some asynchronous operation (do_something, a call which returns a Promise) initiated by the event listener, depending on the result (result) of the operation, call preventDefault on the even
Section/Content To Improve
Config defaults
Suggested Improvement
The documentation teases with a concept of common when setting default header values:
axios.defaults.headers.common['Authorization'] = AUTH_TOKEN;
axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded';Presumably, that mean
When not using a file extension in ESM - eg import pkg from './path' we currently just throw a straightforward not found error. As proposed by @MylesBorins in nodejs/modules#443 it would be useful to enhance this error message.
Ideally the error message should run the CJS resolver and say "the CJS resolver would have resolved this module to ...". We actually previous
Huge and nice collection and also getting very much appreciated from the community.
It would be great if somebody can translate into English then it will be reaching out to global.
Redundant condition
This condition is redundant, the while condition covers the case where n equals 1.
p.s- I will exploit this opportunity to say thank you for this repository.
The deprecated decodeDracoFile method should be removed and replaced with a parse method similar to other loaders. Currently decodeDracoFile does not propagate errors, and should do so. So probably a signature like:
dracoLoader.parse( arrayBuffer, /* options, maybe? */, onLoad, onError );Search Terms
inferable types no-inferable-types no-inferrable-types removal
Suggestion
It is somewhat unnecessary to add : type declarations for member, parameter, and/or variable types already inferable from code.
// This type declaration actually requests a lower amount of type information,
// as `number` is less specific (narrow) than `3`
const value: number = 3;Documentation Feedback
https://github.com/angular/angular/blob/403bb6bee341ac12c9bfbd9f910432c2d385886f/packages/forms/src/model.ts#L295-L300 is a lie. In particular, it says valueChanges "emits an event every time the value of the control changes", but in fact when you call enable() or disable() without passing along {emitEvent: false} it will also emit :(
This behavior should ei
Description
So our function arrayToHtmlList is in a pretty bad space and could use an update. We already had some discussion over at #675 but I wanted to move the update discussion over to an issue for more visibility.
Current problem:
It uses an awkward query selector instead of the `document.prototype.getElementBy
Why theme.breakpoints.between doesn't take 2 number as optional input type like all the others breakpoints functions?
Is it possibile to add this possibility?
Thanks
Bug report
What is the current behavior?
Before 4.31.0, webpack never referenced document when it is not defined. After this release, there is code somewhere which assumes a global document is available. This makes it so server side rendering does not work in our application.
If the current behavior is a bug, please provide the steps to reproduce.
Using webpack > 4.31.0
If you follow the readme procedure, the following error will occur in the first npm install express.
saveError ENOENT: no such file or directory, open '/xxx/xxx/package.json'
As you know, the cause is package.json does not exist.
Other users seem to have a similar error, so it seems better to add npm init to the readme.
Or I thought it would be nice to bring a link `Please follow
I have a chart with values in billions, how do i make the chart look normal without having to scroll 10 pages?
Describe the bug
Story book is trying to add click listeners to all elements inside a panel addon. This throws console warnings when the element is an iframe
backend.js:6 Adding a click listener to iframe failed: DOMException: Blocked a frame with origin "http://localhost:9009" from accessing a cross-origin frame.
To Reproduce
Steps to reproduce the behavior:
- I followed th
A professional front-end template for building fast, robust, and adaptable web apps or sites.
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Updated
Dec 27, 2019 - JavaScript
Existing Component
是
Component Name
table
Description
when i call toggleAllSelection function , the select-all were emited。but the document describe select-all will be emited when user click the button。I think the md document should describe the feature correctly
const customizer = console.log // returns undefined => merging is handled by `mergeAllWith`
// good
mergeAll([{ a: 1 }, { b: 2 }]) // { a: 1, b: 2 }
mergeAllWith(customizer, [{ a: 1 }, { b: 2 }]) // { a: 1, b: 2 }
// A-OK; customizer logs the following:
// undefined 2 "b" Object { a: 1, b: 2 } Object { b: 2 } undefined
// bad
mergeAll({}, { a: 1 }, { b: 2 }) // { a: 1, b: 2 }; OUOn Meteor 1.8.1 this is maybe true for browser-policy package, but it is not really true for any realistic Meteor app these days because apps use ecmascript which requires dynamic-import, which enabled eval by default. So in practice, by default, eval is enabled. See #10704.
It should be probably clarified in the README that the package by default keeps it disabled, but Meteor apps by
:white_check_mark: The largest Node.js best practices list (December 2019)
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Updated
Dec 27, 2019 - JavaScript
Do you want to request a feature or report a bug?
feature request
What is the current behavior?
Currently yarn why won't indicate any package info in the resolutions field
If the current behavior is a bug, please provide the steps to reproduce.
- install a package with any version, e.g
"pkg": "^1.0.0" - add
resolutionsfield in package.json,pkg: "1.0.0" - upd
🗂 The perfect Front-End Checklist for modern websites and meticulous developers
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Updated
Dec 27, 2019 - JavaScript
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浏览器信息
- 浏览器名称,版本号 Chorme
Created by Brendan Eich
Released December 4, 1995
- Website
- developer.mozilla.org/en-US/docs/Web/JavaScript
- Wikipedia
- Wikipedia


The GIF over here depicts fCC in its old design. Even though I don't think there's anything wrong with it, I guess it should be updated to align with how fCC looks now
![image](https://user-images.githubusercontent.com/34807532/70627002-6e7c8280-1c4b-11ea-87d