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freeCodeCamp/curriculum/challenges/english/03-front-end-libraries/react/access-props-using-this.props.md
Oliver Eyton-Williams ee1e8abd87 feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

166 lines
4.4 KiB
Markdown

---
id: 5a24c314108439a4d403616e
title: Access Props Using this.props
challengeType: 6
forumTopicId: 301375
dashedName: access-props-using-this-props
---
# --description--
The last several challenges covered the basic ways to pass props to child components. But what if the child component that you're passing a prop to is an ES6 class component, rather than a stateless functional component? The ES6 class component uses a slightly different convention to access props.
Anytime you refer to a class component within itself, you use the `this` keyword. To access props within a class component, you preface the code that you use to access it with `this`. For example, if an ES6 class component has a prop called `data`, you write `{this.props.data}` in JSX.
# --instructions--
Render an instance of the `ReturnTempPassword` component in the parent component `ResetPassword`. Here, give `ReturnTempPassword` a prop of `tempPassword` and assign it a value of a string that is at least 8 characters long. Within the child, `ReturnTempPassword`, access the `tempPassword` prop within the `strong` tags to make sure the user sees the temporary password.
# --hints--
The `ResetPassword` component should return a single `div` element.
```js
assert(
(function () {
const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
return mockedComponent.children().type() === 'div';
})()
);
```
The fourth child of `ResetPassword` should be the `ReturnTempPassword` component.
```js
assert(
(function () {
const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
return (
mockedComponent.children().childAt(3).name() === 'ReturnTempPassword'
);
})()
);
```
The `ReturnTempPassword` component should have a prop called `tempPassword`.
```js
assert(
(function () {
const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
return mockedComponent.find('ReturnTempPassword').props().tempPassword;
})()
);
```
The `tempPassword` prop of `ReturnTempPassword` should be equal to a string of at least `8` characters.
```js
assert(
(function () {
const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
const temp = mockedComponent.find('ReturnTempPassword').props()
.tempPassword;
return typeof temp === 'string' && temp.length >= 8;
})()
);
```
The `ReturnTempPassword` component should display the password you create as the `tempPassword` prop within `strong` tags.
```js
assert(
(function () {
const mockedComponent = Enzyme.mount(React.createElement(ResetPassword));
return (
mockedComponent.find('strong').text() ===
mockedComponent.find('ReturnTempPassword').props().tempPassword
);
})()
);
```
# --seed--
## --after-user-code--
```jsx
ReactDOM.render(<ResetPassword />, document.getElementById('root'))
```
## --seed-contents--
```jsx
class ReturnTempPassword extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
{ /* Change code below this line */ }
<p>Your temporary password is: <strong></strong></p>
{ /* Change code above this line */ }
</div>
);
}
};
class ResetPassword extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<h2>Reset Password</h2>
<h3>We've generated a new temporary password for you.</h3>
<h3>Please reset this password from your account settings ASAP.</h3>
{ /* Change code below this line */ }
{ /* Change code above this line */ }
</div>
);
}
};
```
# --solutions--
```jsx
class ReturnTempPassword extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<p>Your temporary password is: <strong>{this.props.tempPassword}</strong></p>
</div>
);
}
};
class ResetPassword extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<h2>Reset Password</h2>
<h3>We've generated a new temporary password for you.</h3>
<h3>Please reset this password from your account settings ASAP.</h3>
{ /* Change code below this line */ }
<ReturnTempPassword tempPassword="serrPbqrPnzc" />
{ /* Change code above this line */ }
</div>
);
}
};
```