chore(i8n,learn): processed translations

curriculum/challenges/espanol/03-front-end-libraries/react/write-a-simple-counter.md

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+---
+id: 5a24c314108439a4d4036177
+title: Write a Simple Counter
+challengeType: 6
+forumTopicId: 301425
+dashedName: write-a-simple-counter
+---
+
+# --description--
+
+You can design a more complex stateful component by combining the concepts covered so far. These include initializing `state`, writing methods that set `state`, and assigning click handlers to trigger these methods.
+
+# --instructions--
+
+The `Counter` component keeps track of a `count` value in `state`. There are two buttons which call methods `increment()` and `decrement()`. Write these methods so the counter value is incremented or decremented by 1 when the appropriate button is clicked. Also, create a `reset()` method so when the reset button is clicked, the count is set to 0.
+
+**Note:** Make sure you don't modify the `classNames` of the buttons. Also, remember to add the necessary bindings for the newly-created methods in the constructor.
+
+# --hints--
+
+`Counter` should return a `div` element which contains three buttons with text content in this order `Increment!`, `Decrement!`, `Reset`.
+
+```js
+assert(
+  (() => {
+    const mockedComponent = Enzyme.mount(React.createElement(Counter));
+    return (
+      mockedComponent.find('.inc').text() === 'Increment!' &&
+      mockedComponent.find('.dec').text() === 'Decrement!' &&
+      mockedComponent.find('.reset').text() === 'Reset'
+    );
+  })()
+);
+```
+
+The state of `Counter` should initialize with a `count` property set to `0`.
+
+```js
+const mockedComponent = Enzyme.mount(React.createElement(Counter));
+assert(mockedComponent.find('h1').text() === 'Current Count: 0');
+```
+
+Clicking the increment button should increment the count by `1`.
+
+```js
+const mockedComponent = Enzyme.mount(React.createElement(Counter));
+mockedComponent.find('.inc').simulate('click');
+assert(mockedComponent.find('h1').text() === 'Current Count: 1');
+```
+
+Clicking the decrement button should decrement the count by `1`.
+
+```js
+const mockedComponent = Enzyme.mount(React.createElement(Counter));
+mockedComponent.find('.dec').simulate('click');
+assert(mockedComponent.find('h1').text() === 'Current Count: -1');
+```
+
+Clicking the reset button should reset the count to `0`.
+
+```js
+const mockedComponent = Enzyme.mount(React.createElement(Counter));
+mockedComponent.setState({ count: 5 });
+const currentCountElement = mockedComponent.find('h1');
+assert(currentCountElement.text() === 'Current Count: 5');
+mockedComponent.find('.reset').simulate('click');
+assert(currentCountElement.text() === 'Current Count: 0');
+```
+
+# --seed--
+
+## --after-user-code--
+
+```jsx
+ReactDOM.render(<Counter />, document.getElementById('root'))
+```
+
+## --seed-contents--
+
+```jsx
+class Counter extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      count: 0
+    };
+    // Change code below this line
+
+    // Change code above this line
+  }
+  // Change code below this line
+
+  // Change code above this line
+  render() {
+    return (
+      <div>
+        <button className='inc' onClick={this.increment}>Increment!</button>
+        <button className='dec' onClick={this.decrement}>Decrement!</button>
+        <button className='reset' onClick={this.reset}>Reset</button>
+        <h1>Current Count: {this.state.count}</h1>
+      </div>
+    );
+  }
+};
+```
+
+# --solutions--
+
+```jsx
+class Counter extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      count: 0
+    };
+  this.increment = this.increment.bind(this);
+ this.decrement = this.decrement.bind(this);
+ this.reset = this.reset.bind(this);
+ }
+  reset() {
+    this.setState({
+      count: 0
+    });
+  }
+  increment() {
+    this.setState(state => ({
+      count: state.count + 1
+    }));
+  }
+  decrement() {
+    this.setState(state => ({
+      count: state.count - 1
+    }));
+  }
+  render() {
+    return (
+      <div>
+        <button className='inc' onClick={this.increment}>Increment!</button>
+        <button className='dec' onClick={this.decrement}>Decrement!</button>
+        <button className='reset' onClick={this.reset}>Reset</button>
+        <h1>Current Count: {this.state.count}</h1>
+      </div>
+    );
+  }
+};
+```