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All content for the JavaScript 3 course
Innan du frågar, har du sett över följande:
Console
i din browser?Det funkar inte, lol
Det ska fungera??
Exempel
./src/App.js
Line 9: 'Header' is not defined react/jsx-no-undef
Search for the keywords to learn more about each error.
I'm vegan
Har fått problem med ett nytt create-react-app projekt
Försökte starta ett nytt projekt med create-react-app. Gjorde som vanligt
create-react-app new-project
och har fått ett fel vid körningen.
npm ERR! path C:\Users\4886t\Desktop\brevery-db\node_modules\nan\package.json
npm ERR! code EPERM
npm ERR! errno -4048
npm ERR! syscall unlink
npm ERR! Error: EPERM: operation not permitted, unlink 'C:\Users\4886t\Desktop\brevery-db\node_modules\nan\package.json'
npm ERR! at Error (native)
npm ERR! { Error: EPERM: operation not permitted, unlink 'C:\Users\4886t\Desktop\brevery-db\node_modules\nan\package.json'
npm ERR! at Error (native)
npm ERR! stack: 'Error: EPERM: operation not permitted, unlink 'C:\Users\4886t\Desktop\brevery-db\node_modules\nan\package.json'\n at Error (n ative)',
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'unlink',
npm ERR! path: 'C:\Users\4886t\Desktop\brevery-db\node_modules\nan\package.json' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\4886t\AppData\Roaming\npm-cache_logs\2017-09-04T13_42_20_011Z-debug.log
Aborting installation.
npm install --save --save-exact --loglevel error react react-dom react-scripts has failed.
npm cache clean --force
men får igen samma fel. Är det någon som har upplevt samma?
It is not working. Desperate need help.
const storage = firebase.storage().ref();
export default class App extends Component {
constructor(){
super();
this.state={
dalaLogo:''
}
this.getImage('dalaLogo');
}
getImage (image) {
storage.child(`${image}.jpg`).getDownloadURL().then((url) => {
this.state[image] = url
this.setState(this.state)
}).catch((error) => {
// Handle any errors
console.log('yoooo');
})
}
render(){
return(
<div>
<img src={this.state.dalaLogo} alt=""/><p>brbrbr</p>
</div>
)
}
}
Snälla, jag måste veta men kan inte googla???
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JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
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We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
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Data-Driven Documents codes.
China tencent open source team.