* chore: rename APIs and Microservices to include "Backend" (#42515) * fix typo * fix typo * undo change * Corrected grammar mistake Corrected a grammar mistake by removing a comma. * change APIs and Microservices cert title * update title * Change APIs and Microservices certi title * Update translations.json * update title * feat(curriculum): rename apis and microservices cert * rename folder structure * rename certificate * rename learn Markdown * apis-and-microservices -> back-end-development-and-apis * update backend meta * update i18n langs and cypress test Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * fix: add development to front-end libraries (#42512) * fix: added-the-word-Development-to-front-end-libraries * fix/added-the-word-Development-to-front-end-libraries * fix/added-word-development-to-front-end-libraries-in-other-related-files * fix/added-the-word-Development-to-front-end-and-all-related-files * fix/removed-typos-from-last-commit-in-index.md * fix/reverted-changes-that-i-made-to-dependecies * fix/removed xvfg * fix/reverted changes that i made to package.json * remove unwanted changes * front-end-development-libraries changes * rename backend certSlug and README * update i18n folder names and keys * test: add legacy path redirect tests This uses serve.json from the client-config repo, since we currently use that in production * fix: create public dir before moving serve.json * fix: add missing script * refactor: collect redirect tests * test: convert to cy.location for stricter tests * rename certificate folder to 00-certificates * change crowdin config to recognise new certificates location * allow translations to be used Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> * add forwards slashes to path redirects * fix cypress path tests again * plese cypress * fix: test different challenge Okay so I literally have no idea why this one particular challenge fails in Cypress Firefox ONLY. Tom and I paired and spun a full build instance and confirmed in Firefox the page loads and redirects as expected. Changing to another bootstrap challenge passes Cypress firefox locally. Absolutely boggled by this. AAAAAAAAAAAAAAA * fix: separate the test Okay apparently the test does not work unless we separate it into a different `it` statement. >:( >:( >:( >:( Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com> Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com> Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
120 lines
3.2 KiB
Markdown
120 lines
3.2 KiB
Markdown
---
|
|
id: 5a24c314108439a4d4036172
|
|
title: Presentare lo stato nell'interfaccia utente in un altro modo
|
|
challengeType: 6
|
|
forumTopicId: 301408
|
|
dashedName: render-state-in-the-user-interface-another-way
|
|
---
|
|
|
|
# --description--
|
|
|
|
C'è un altro modo per accedere allo `state` in un componente. Nel metodo `render()`, prima dell'istruzione `return`, è possibile scrivere direttamente del JavaScript. Ad esempio, è possibile dichiarare funzioni, accedere ai dati da `state` o `props`, eseguire calcoli su questi dati, e così via. Poi, puoi assegnare qualsiasi dato alle variabili a cui hai accesso nell'istruzione `return`.
|
|
|
|
# --instructions--
|
|
|
|
Nel metodo render di `MyComponent`, definisci una `const` chiamata `name` e impostala al valore di name nello `state` del componente. Poiché in questa parte del codice è possibile scrivere direttamente in JavaScript, non è necessario racchiudere questo riferimento tra parentesi graffe.
|
|
|
|
Successivamente, nell'istruzione return, presenta questo valore in un tag `h1` utilizzando la variabile `name`. Ricorda però che nell'istruzione return dovrai utilizzare la sintassi JSX (parentesi graffe per il JavaScript).
|
|
|
|
# --hints--
|
|
|
|
`MyComponent` dovrebbe avere una chiave `name` con valore `freeCodeCamp` memorizzato nel suo stato.
|
|
|
|
```js
|
|
assert(
|
|
Enzyme.mount(React.createElement(MyComponent)).state('name') ===
|
|
'freeCodeCamp'
|
|
);
|
|
```
|
|
|
|
`MyComponent` dovrebbe presentare un'intestazione `h1` racchiusa in un singolo `div`.
|
|
|
|
```js
|
|
assert(
|
|
/<div><h1>.*<\/h1><\/div>/.test(
|
|
Enzyme.mount(React.createElement(MyComponent)).html()
|
|
)
|
|
);
|
|
```
|
|
|
|
Il tag `h1` presentato dovrebbe includere un riferimento a `{name}`.
|
|
|
|
```js
|
|
(getUserInput) =>
|
|
assert(/<h1>\n*\s*\{\s*name\s*\}\s*\n*<\/h1>/.test(getUserInput('index')));
|
|
```
|
|
|
|
L'intestazione `h1` dovrebbe contenere testo presentato dallo stato del componente.
|
|
|
|
```js
|
|
async () => {
|
|
const waitForIt = (fn) =>
|
|
new Promise((resolve, reject) => setTimeout(() => resolve(fn()), 250));
|
|
const mockedComponent = Enzyme.mount(React.createElement(MyComponent));
|
|
const first = () => {
|
|
mockedComponent.setState({ name: 'TestName' });
|
|
return waitForIt(() => mockedComponent.html());
|
|
};
|
|
const firstValue = await first();
|
|
assert(firstValue === '<div><h1>TestName</h1></div>');
|
|
};
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --after-user-code--
|
|
|
|
```jsx
|
|
ReactDOM.render(<MyComponent />, document.getElementById('root'))
|
|
```
|
|
|
|
## --seed-contents--
|
|
|
|
```jsx
|
|
class MyComponent extends React.Component {
|
|
constructor(props) {
|
|
super(props);
|
|
this.state = {
|
|
name: 'freeCodeCamp'
|
|
}
|
|
}
|
|
render() {
|
|
// Change code below this line
|
|
|
|
// Change code above this line
|
|
return (
|
|
<div>
|
|
{ /* Change code below this line */ }
|
|
|
|
{ /* Change code above this line */ }
|
|
</div>
|
|
);
|
|
}
|
|
};
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```jsx
|
|
class MyComponent extends React.Component {
|
|
constructor(props) {
|
|
super(props);
|
|
this.state = {
|
|
name: 'freeCodeCamp'
|
|
}
|
|
}
|
|
render() {
|
|
// Change code below this line
|
|
const name = this.state.name;
|
|
// Change code above this line
|
|
return (
|
|
<div>
|
|
{ /* Change code below this line */ }
|
|
<h1>{name}</h1>
|
|
{ /* Change code above this line */ }
|
|
</div>
|
|
);
|
|
}
|
|
};
|
|
```
|