I am working on a proposal that I intend to bring to the next TC39
meeting. The (very much in need of updating) gist for my proposal is here:
https://gist.github.com/jeffmo/054df782c05639da2adb
(Note that this gist is from July of last year, which was before we
eliminated @@create and imposed the new super() allocation semantics for
derived classes -- so it needs to be updated to reflect those two
changes. Hopefully I can find some time to update it in the next week or
two)
-Jeff
On 2/10/15 7:47 AM, Benjamin (Inglor) Gruenbaum wrote:
Looking at the syntax from here:
http://facebook.github.io/react/blog/2015/01/27/react-v0.13.0-beta-1.html#es7-property-initializers
ES7+ Property Initializers
Wait, assigning to properties seems like a very imperative way of
defining classes! You're right, however, we designed it this way
because it's idiomatic. We fully expect a more declarative syntax for
property initialization to arrive in future version of JavaScript. It
might look something like this:
// Future
VersionexportclassCounterextendsReact.Component{staticpropTypes={initialCount:React.PropTypes.number};staticdefaultProps={initialCount:0};state={count:this.props.initialCount};tick(){this.setState({count:this.state.count+1});}render(){return(<divonClick={this.tick.bind(this)}>Clicks:{this.state.count}</div>);}}
Also discussed here:
https://github.com/6to5/6to5/issues/619
Are there any plans to specify this? Are there any proposals being
worked on to specify syntax similar to this or alternative syntax
addressing this?
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