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todoAppFirebaseExplicit.js
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todoAppFirebaseExplicit.js
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var TodoList2 = React.createClass({
render: function() {
var _this = this;
var createItem = function(item, index) {
return (
<li key={ index }>
{ item.text }
<span onClick={ _this.props.removeItem.bind(null, item['.key']) }
style={{ color: 'red', marginLeft: '10px', cursor: 'pointer' }}>
X
</span>
</li>
);
};
return <ul>{ this.props.items.map(createItem) }</ul>;
}
});
var TodoApp2 = React.createClass({
getInitialState: function() {
return {
items: [],
text: ''
};
},
componentWillMount: function() {
this.firebaseRef = firebase.database().ref('todoApp/items');
this.firebaseRef.limitToLast(25).on('value', function(dataSnapshot) {
var items = [];
dataSnapshot.forEach(function(childSnapshot) {
var item = childSnapshot.val();
item['.key'] = childSnapshot.key;
items.push(item);
});
this.setState({
items: items
});
}.bind(this));
},
componentWillUnmount: function() {
this.firebaseRef.off();
},
onChange: function(e) {
this.setState({text: e.target.value});
},
removeItem: function(key) {
var firebaseRef = firebase.database().ref('todoApp/items');;
firebaseRef.child(key).remove();
},
handleSubmit: function(e) {
e.preventDefault();
if (this.state.text && this.state.text.trim().length !== 0) {
this.firebaseRef.push({
text: this.state.text
});
this.setState({
text: ''
});
}
},
render: function() {
return (
<div>
<TodoList2 items={ this.state.items } removeItem={ this.removeItem } />
<form onSubmit={ this.handleSubmit }>
<input onChange={ this.onChange } value={ this.state.text } />
<button>{ 'Add #' + (this.state.items.length + 1) }</button>
</form>
</div>
);
}
});
ReactDOM.render(<TodoApp2 />, document.getElementById('todoApp2'));