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tutorial: Fetch data in componentDidMount instead 

In a world where this component was server-rendered, we wouldn't want to call the data-fetching code there so it makes more sense to have it in componentDidMount.
This commit is contained in:
Ben Alpert 2014-07-09 12:02:54 -07:00
parent cd1adc5303
commit 774f5a022e
1 changed files with 6 additions and 6 deletions
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12
docs/docs/tutorial.md
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@ -386,7 +386,7 @@ var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentWillMount: function() {
componentDidMount: function() {
$.ajax({
url: this.props.url,
dataType: 'json',
@ -410,7 +410,7 @@ var CommentBox = React.createClass({
});
```
Here, `componentWillMount` is a method called automatically by React before a component is rendered. The key to dynamic updates is the call to `this.setState()`. We replace the old array of comments with the new one from the server and the UI automatically updates itself. Because of this reactivity, it is only a minor change to add live updates. We will use simple polling here but you could easily use WebSockets or other technologies.
Here, `componentDidMount` is a method called automatically by React when a component is rendered. The key to dynamic updates is the call to `this.setState()`. We replace the old array of comments with the new one from the server and the UI automatically updates itself. Because of this reactivity, it is only a minor change to add live updates. We will use simple polling here but you could easily use WebSockets or other technologies.
```javascript{3,19-20,34}
// tutorial14.js
@ -430,7 +430,7 @@ var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentWillMount: function() {
componentDidMount: function() {
this.loadCommentsFromServer();
setInterval(this.loadCommentsFromServer, this.props.pollInterval);
},
@ -538,7 +538,7 @@ var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentWillMount: function() {
componentDidMount: function() {
this.loadCommentsFromServer();
setInterval(this.loadCommentsFromServer, this.props.pollInterval);
},
@ -613,7 +613,7 @@ var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentWillMount: function() {
componentDidMount: function() {
this.loadCommentsFromServer();
setInterval(this.loadCommentsFromServer, this.props.pollInterval);
},
@ -668,7 +668,7 @@ var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentWillMount: function() {
componentDidMount: function() {
this.loadCommentsFromServer();
setInterval(this.loadCommentsFromServer, this.props.pollInterval);
},