发布-订阅功能_HTML_下载.zip

<!--- This README is automatically generated from the comments in these files: iron-signals.html Edit those files, and our readme bot will duplicate them over here! Edit this file, and the bot will squash your changes :) The bot does some handling of markdown. Please file a bug if it does the wrong thing! https://github.com/PolymerLabs/tedium/issues --> [](https://travis-ci.org/PolymerElements/iron-signals) _[Demo and API docs](https://elements.polymer-project.org/elements/iron-signals)_ ##&lt;iron-signals&gt; `iron-signals` provides basic publish-subscribe functionality. Note: avoid using `iron-signals` whenever you can use a controller (parent element) to mediate communication instead. To send a signal, fire a custom event of type `iron-signal`, with a detail object containing `name` and `data` fields. ```javascript this.fire('iron-signal', {name: 'hello', data: null}); ``` To receive a signal, listen for `iron-signal-<name>` event on a `iron-signals` element. <iron-signals on-iron-signal-hello="{{helloSignal}}"> You can fire a signal event from anywhere, and all `iron-signals` elements will receive the event, regardless of where they are in DOM.