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import React, { Component } from 'react'; | |
import _ from 'lodash'; | |
class MealPlan extends Component { | |
state = { | |
meal: '', | |
meals: [], | |
showAddMealMessage: false | |
}; | |
renderMeals() { | |
return _.map(this.state.meals, meal => <li>{meal}</li>); | |
} | |
componentWillMount() { | |
this.setState({meals: ["Eggs with bacon", "Spaghetti carbonara", "Oatmeal"]}); | |
} | |
componentDidUpdate(prevProps, prevState) { | |
if (prevState.meals.length < this.state.meals.length) { | |
this.setState({showAddMealMessage: true}); | |
setTimeout(() => this.setState({showAddMealMessage: false}), 1000); | |
} | |
} | |
render() { | |
return( | |
<div> | |
<h2>Today you should eat this</h2> | |
<input | |
onChange={e => this.setState({meal: e.target.value})} | |
value={this.state.meal} | |
type="text" | |
/> | |
<button | |
onClick={() => this.setState({meals: [...this.state.meals, this.state.meal]})}> | |
Add meal</button> | |
{this.state.showAddMealMessage ? <p>New meal added</p> : null} | |
<ul> | |
{this.renderMeals()} | |
</ul> | |
</div> | |
); | |
} | |
} | |
export default MealPlan; |
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