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npm install --save-dev eslint
npm install --save-dev eslint-config-airbnb-base
npm install --save-dev eslint-plugin-import
"eslintConfig": {
"extends": "airbnb-base",
"env": {
"es6": true,
"browser": true
},
"rules": {
"brace-style": [
"error",
"stroustrup"
],
"comma-dangle": [
"error",
"never"
],
"no-unused-vars": [
"warn"
],
"no-var": [
"off"
],
"one-var": [
"off"
]
}
}
eslint --debug app.js
npm -g install eslint-plugin-import eslint-config-airbnb-base
Trending Discussions on javascript
Trending Discussions on javascript
QUESTION
I have scripts In my React app that are inserted dynamically later on. The scripts don't load.
In my database there is a field called content
, which contains data that includes html and javascript. There are many records and each record can include multiple scripts in the content
field. So it's not really an option to statically specify each of the script-urls in my React app. The field for a record could for example look like:
Some text and html
Some text. Etc…
I call on this field in my React app using dangerouslySetInnerHTML
:
render() {
return (
... some other data
);
}
It correctly loads the data from the database and displays the html from that data. However, the Javascript does not get executed. I think the script doesn't work because it is dynamically inserted later on. How can I make these scripts work/run?
This post suggest a solution for dynamically inserted scripts, but I don't think I can apply this solution because in my case the script/code is inserted from a database (so how to then use nodeScriptReplace
on the code...?). Any suggestions how I might make my scripts work?
Update in response to @lissettdm their answer:
constructor(props) {
this.ref = React.createRef();
}
componentDidUpdate(prevProps, prevState) {
if (prevProps.postData !== this.props.postData) {
this.setState({
loading: false,
post: this.props.postData.data,
//etc
});
setTimeout(() => parseElements());
console.log(this.props.postData.data.content);
// returns html string like: `
... some other data
);
);
}
The this.ref.current.appendChild(node);
line produces the error:
TypeError: Cannot read properties of null (reading 'appendChild')
ANSWER
Answered 2022-Apr-14 at 19:05Rendering raw HTML without React recommended method is not a good practice. React recommends method dangerouslySetInnerHTML to render raw HTML.
QUESTION
Trying to work with node/javascript/nfts, I am a noob and followed along a tutorial, but I get this error:
error [ERR_REQUIRE_ESM]: require() of ES Module [...] is not supported. Instead change the require of index.js [ in my file...] to a dynamic import() which is available in all CommonJS modules
My understanding is that they've updated the node file, so i need a different code than that in the tutorial, but i don't know which one I'm supposed to change, where and to what. Please be as specific as you can
const FormData = require('form-data');
const fetch = require('node-fetch');
const path = require("path")
const basePath = process.cwd();
const fs = require("fs");
fs.readdirSync(`${basePath}/build/images`).foreach(file).forEach(file => {
const formData = new FormData();
const fileStream = fs.createReadStream(`${basePath}/build/images/${file}`);
formData.append('file',fileStream);
let url = 'https://api.nftport.xyz/v0/files';
let options = {
method: 'POST',
headers: {
Authorization: '[...]',
},
body: formData
};
fetch(url, options)
.then(res => res.json())
.then(json => {
const fileName = path.parse(json.file_name).name;
let rawdata = fs.readFileSync(`${basePath}/build/json/${fileName}.json`);
let metaData = JSON.parse(rawdata);
metaData.file_url = json.ipfs_url;
fs.writeFileSync(`${basePath}/build/json${fileName}.json`, JSON.stringify(metaData, null, 2));
console.log(`${json.file_name} uploaded & ${fileName}.json updated!`);
})
.catch(err => console.error('error:' + err));
})
ANSWER
Answered 2021-Dec-31 at 10:07It is because of the node-fetch
package. As recent versions of this package only support ESM, you have to downgrade it to an older version node-fetch@2.6.1
or lower.
npm i node-fetch@2.6.1
This should solve the issue.
QUESTION
If i search the same question on the internet, then i'll get only links to vscode website ans some blogs which implements it.
I want to know that is jsconfig.json
is specific to vscode
or javascript/webpack
?
What will happen if we deploy the application on AWS / Heroku, etc. Do we have to make change?
ANSWER
Answered 2021-Aug-06 at 04:10This is definitely specific to VSCode.
The presence of jsconfig.json file in a directory indicates that the directory is the root of a JavaScript Project. The jsconfig.json file specifies the root files and the options for the features provided by the JavaScript language service.
Check more details here: https://code.visualstudio.com/docs/languages/jsconfig
You don't need this file when deploy it on AWS/Heroku, basically, you can exclude this from your commit if you are using git repo, i.e., add jsconfig.json
in your .gitignore
, this will make your project IDE independent.
QUESTION
I updated my Chrome and Chromedriver to the latest version yesterday, and since then I get the following error messages when running my Cucumber features:
....
unknown error: Cannot construct KeyEvent from non-typeable key
(Session info: chrome=98.0.4758.80) (Selenium::WebDriver::Error::UnknownError)
#0 0x55e9ce6a4093
#1 0x55e9ce16a648
#2 0x55e9ce1a9866
#3 0x55e9ce1cbd29
.....
I try to fill a text field with Capybara's fill_in
method. While debugging I noticed that Capybara has problems especially with the symbols @
and \
. Every other character can be written into the text field without any problems.
The code that triggers the error looks like this
def sign_in(user)
visit new_sign_in_path
fill_in 'Email', with: user.email
fill_in 'Password', with: user.password
click_button 'Sign in'
end
user.email
contains a string like "example1@mail.com"
.
I work with Rails 6.1.3.1, Cucumber 5.3.0, Chromedriver 98.0.4758.48, capybara 3.35.3
The error only occurs on features that are tagged with @javascript
Do you have any ideas what causes this error or how to fix it?
ANSWER
Answered 2022-Feb-03 at 08:25It seems something has changed in the new version of ChromeDriver and it is no longer possible to send some special chars directly using send_keys method.
In this link you will see how it is solved (in C#) --> Selenium - SendKeys("@") write an "à"
And regarding python implementation, check this out --> https://www.geeksforgeeks.org/special-keys-in-selenium-python/
Specifically, my implementation was (using MAC):
driver.find_element('.email-input', 'user@mail.com')
Now I had to change it by:
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.action_chains import ActionChains
emailParts = 'user@mail.com'.split('@')
emailElement = driver.find_element('.email-input')
emailElement.send_keys(emailParts[0])
action = ActionChains(driver)
action.key_down(Keys.ALT).send_keys('2').key_up(Keys.ALT).perform()
emailElement.send_keys(emailParts[1])
QUESTION
Hi am facing an issue while running flutter project in MacBook Air M1 chip Lap. Tried all possibilities couldn't find where is the exact problem.
All basic solutions like flutter clean, flutter pub get, pod deintegrate & install, flutter build ios, flutter run
but still same issue. only on iOS simulator not deploying.
Any solution for this. Thanks in advance.
Error
Launching lib/main.dart on iPhone 13 in debug mode...
Running pod install... 5.3s
Running Xcode build...
Xcode build done. 104.1s
Failed to build iOS app
Error output from Xcode build:
↳
objc[25282]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libamsupport.dylib (0x203913130) and
/Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103bc02c8). One of the two will be used. Which one is undefined.
objc[25282]: Class AMSupportURLSession is implemented in both /usr/lib/libamsupport.dylib (0x203913180) and
/Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103bc0318). One of the two will be used. Which one is undefined.
** BUILD FAILED **
flutter doctor -v
[✓] Flutter (Channel stable, 2.8.1, on macOS 12.0.1 21A559 darwin-arm, locale
en-IN)
• Flutter version 2.8.1 at
/Users/macsystem/Documents/developer/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 77d935af4d (7 weeks ago), 2021-12-16 08:37:33 -0800
• Engine revision 890a5fca2e
• Dart version 2.15.1
[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
• Android SDK at /Users/macsystem/Library/Android/sdk
• Platform android-32, build-tools 32.0.0
• Java binary at: /Applications/Android
Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7249189)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• CocoaPods version 1.11.2
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2020.3)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7249189)
[✓] Connected device (2 available)
• iPhone 13 (mobile) • 05EC9698-3C26-44B9-8DB0-B53C7B6576F3 • ios
• com.apple.CoreSimulator.SimRuntime.iOS-15-2 (simulator)
• Chrome (web) • chrome • web-javascript
• Google Chrome 97.0.4692.99
ANSWER
Answered 2022-Feb-02 at 04:43I have been facing this same issue for some time now. the same setup is working nicely in a mac with intel chip. But i have even done a resetup of my system, m1 mac still throws the same error.
QUESTION
I've read an article about JavaScript parseInt
, which had this question:
parseInt(0.5); // => 0
parseInt(0.05); // => 0
parseInt(0.005); // => 0
parseInt(0.0005); // => 0
parseInt(0.00005); // => 0
parseInt(0.000005); // => 0
parseInt(0.0000005); // => 5
Why is this happening?
ANSWER
Answered 2022-Feb-21 at 15:36I've searched about it on ecmascript standard, and saw this:
The first step is converting the input to `string` if it is not
:
19.2.5 parseInt ( string, radix )
The parseInt function is the %parseInt% intrinsic object. When the parseInt function is called, the following steps are taken:
Let inputString be ? ToString(string).
- Let S be ! TrimString(inputString, start).
...
So, I've checked the values on string-based using String
function to see what is the output for each of them:
String(0.5); // => '0.5'
String(0.05); // => '0.05'
String(0.005); // => '0.005'
String(0.0005); // => '0.0005'
String(0.00005); // => '0.00005'
String(0.000005); // => '0.000005'
String(0.0000005); // => '5e-7'
So, it means when we use parseInt(0.0000005)
, it is equal to parseInt('5e-7')
and based on the definition:
parseInt
may interpretonly a leading portion of string as an integer value
; it ignores any code units that cannot be interpreted as part of the notation of an integer, and no indication is given that any such code units were ignored.
So the answer will return 5
only because it is the only character which is a number till a noncharacter e
, so the rest of it e-7
will be discarded.
QUESTION
In JavaScript, values of objects and arrays can be indexed like the following: objOrArray[index]
. Is there an identity "index" value?
In other words:
Is there a value of x
that makes the following always true?
let a = [1, 2, 3, 4];
/* Is this true? */ a[x] == a
let b = { a: 1, b: 2, c: 3 };
/* Is this true? */ b[x] == b
Definition of an identity in this context: https://en.wikipedia.org/wiki/Identity_function
ANSWER
Answered 2021-Oct-05 at 01:31The indexing operation doesn't have an identity element. The domain and range of indexing is not necessarily the same -- the domain is arrays and objects, but the range is any type of object, since array elements and object properties can hold any type. If you have an array of integers, the domain is Array
, while the range is Integer
, so it's not possible for there to be an identity. a[x]
will always be an integer, which can never be equal to the array itself.
And even if you have an array of arrays, there's no reason to expect any of the elements to be a reference to the array itself. It's possible to create self-referential arrays like this, but most are not. And even if it is, the self-reference could be in any index, so there's no unique identity value.
QUESTION
I am trying to get this link to work, performing a DELETE
request:
<%= link_to "Sign Out", destroy_user_session_path, method: :delete %>
However when I click on it, my browser still performs a GET
request (which fails for obvious reasons):
I have read on multiple other forum posts, that this might have something to do with jquery not being included. They mentioned you would need to un-comment a line in app/javascript/application.js
, however mine is pretty empty:
// Configure your import map in config/importmap.rb. Read more: https://github.com/rails/importmap-rails
import "@hotwired/turbo-rails"
import "controllers"
These forum posts were also quite old, so I suspect something has changed in the meantime.
ANSWER
Answered 2021-Dec-25 at 22:28As suggested here, the following will suffice:
<%= link_to "Sign Out", destroy_user_session_path, data: { "turbo-method": :delete } %>
I have tested this in my project and it seems to work fine. Thanks also to @alexts, you basically figured this out too, however the comment on GitHub even eliminated the double-request.
QUESTION
I want to be able to call C# code from JavaScript. The mono project used to have a WASM SDK that you could download from their old Jenkins server, but that is no longer public. Existing docs tend to point toward those builds. The Azure Devops builds do not include this SDK. A few messages I've seen on their Github account indicate that they are now focusing on the .NET 6 for WASM. I do not wish to use the Blazor components. Is there a way in .NET 6 to build a minimally sized WASM binary without the Blazor UI?
ANSWER
Answered 2021-Aug-26 at 01:25Yes it's absolutely possible. Blazor does not have a monopoly on C#/WASM and it's far from clear that it's going to wind up being the best long term option (and a lot of evidence it's not).
I recommend starting with the Uno WASM Bootstrap. https://github.com/unoplatform/Uno.Wasm.Bootstrap
QUESTION
I can confirm this issue happened in flutter above 2.5. Using 2.2.3 is fine. The question becomes why this feature been removed in 2.5 ? And how to enable it in flutter 2.5?
[Origin Question]I'm using SingleChildScrollView on flutter web with desktop browser. Scrolling only works on mouse wheel but not on mouse click (drag). How can I map mouse click to touch and scroll like mobile?
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: SingleChildScrollView(
child: Column(
children: List.generate(50, (i) => Text(i.toString())).toList(),
),
),
);
}
}
flutter doctor -v
[✓] Flutter (Channel master, 2.6.0-6.0.pre.6, on Ubuntu 20.04.3 LTS 5.11.0-34-generic, locale en_US.UTF-8)
• Flutter version 2.6.0-6.0.pre.6 at /home/XXX
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 0c5431d99c (12 days ago), 2021-09-05 22:31:02 -0400
• Engine revision b9c633900e
• Dart version 2.15.0 (build 2.15.0-82.0.dev)
[✓] Chrome - develop for the web
• Chrome at google-chrome
[✓] Connected device (2 available)
• Linux (desktop) • linux • linux-x64 • Ubuntu 20.04.3 LTS 5.11.0-34-generic
• Chrome (web) • chrome • web-javascript • Google Chrome 93.0.4577.82
ANSWER
Answered 2021-Sep-18 at 12:19Flutter change mouse scroll behavior after 2.5. See this for detail.
class MyCustomScrollBehavior extends MaterialScrollBehavior {
// Override behavior methods and getters like dragDevices
@override
Set get dragDevices => {
PointerDeviceKind.touch,
PointerDeviceKind.mouse,
// etc.
};
}
// ScrollBehavior can be set for a specific widget.
final ScrollController controller = ScrollController();
ScrollConfiguration(
behavior: MyCustomScrollBehavior(),
child: ListView.builder(
controller: controller,
itemBuilder: (BuildContext context, int index) {
return Text('Item $index');
}
),
);
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