Tools: Reactjs 0.14.0 Vanilla Flux
I need unique identifiers for 2 reasons:
So let's say I have a list of messages that looks like this:
[
{
id: 1241241234, <-----The unique id is kept here
authorName:"Nick"
text:"Hi!"
},
...
]
And now I use a "Array.prototype.map()" to create "ownee" component(MessageListItem
) inside of the owner component MessageSection
function getMessageListItem)(message) {
return (
<MessageListItem key={message.id} message={message}/>
);
}
var MessageSection = React.createClass({
render: function(){
var messageListItems = this.state.messages.map(getMessageListItem);
<div>
{messageListItems }
</div>
}
});
But the this.props.key is undefined in the MessageListItem even though I know for a fact that is was defined when it was passed down.
var ConvoListItem = React.createClass({
render: function() {
console.log(this.props.key); //Undefined
}
});
I'm guessing there is a reason that React is not letting "key" to be used as a prop.
Question:
If I can't use key as a prop - then what is the proper way to handle the duality need of keying and setting unique identifiers on a dynamic list of child elements that contain state?
key and ref aren't really 'props'. They're used internally by react and not passed to components as props. Consider passing it as a prop such as 'id'.