npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@miapp/emitter

v1.0.1

Published

事件触发器

Downloads

8

Readme

emitter

事件触发器

使用

直接使用

import Emitter from '@miapp/emitter';
const emitter = new Emitter();

// 绑定事件
emitter.on('select', callback); // 字符串
emitter.on(['select', 'confirm'], callback); // 数组
emitter.on({ // 对象
  'select': selectCallback, 
  'confirm': confirmCallback
});

// 单次绑定,API 同 on
emitter.once('select', callback);

// 触发事件
emitter.emit('select', { value });

// 解除绑定
emitter.off('select', callback); // 解除单个
emitter.off('select'); // 解除整个类型
emitter.off(); // 解除所有

// 销毁
emitter.destroy();

应用/页面/组件内使用

推荐用 mixinEmitter,见下文

import Emitter from "@miapp/emitter";

// component.js
Component({
  didMount() {
    this.emitter = new Emitter(this);
    this.emitter.on('select', (e) => {
      console.log(e.src);
    });
  },
  didUnmout() {
    this.emitter.destroy();
  },
  methods: {
    handleTap(e) {
      this.emit('select', {
        src: 'component'
      });
    }
  }
});

// page.js
Page({
  onLoad() {
    this.emitter = new Emitter(this);
  },
  onUnload() {
    this.emitter.destroy();
  }
});

// app.js
App({
  onLaunch() {
    this.emitter = new Emitter(this);
  }
});

温馨提示:

  • 建议命名为 this.emitter,内部会有一些相关处理逻辑
  • 为了保证通信功能,记得初始化时传入 this
  • 页面/组件销毁时记得执行 destroy 方法

mixEmitter

为了解决以上几个问题,更方便的使用方式是,直接扩充应用/页面/组件的方法

import { mixinEmitter } from "@miapp/emitter";

Component(mixinEmitter({
  didMount() {
    this.on('select', () => {});
  },
  methods: {
    handleTap(e) {
      this.emit('select', {
        src: 'component'
      });
    }
  }
}));

// page.js
Page(mixinEmitter({
  onLoad() {
    this.on('select', () => {});
  }
}));

// app.js
App(mixinEmitter({
  onLaunch() {
    this.on('select', () => {});
  }
}));

通信功能

冒泡

冒泡至页面

// component.js
// component => page
this.emit('selected|page', {
  src: 'component'
});

// page.js
this.on('selected', (e) => {
  console.log(e.src); // component
});

同时冒泡到页面和应用

// component.js
// component => page => app
this.emit('selected|app', {
  src: 'component'
});

// page.js
this.on('selected', (e) => {
  console.log(e.src); // component
});

// app.js
this.on('selected', (e) => {
  console.log(e.src); // component
});

捕获

如果组件想捕获页面或者全局应用发出的事件

// app.js
this.emit('selected', {
  src: 'app'
});

// page.js
this.emit('selected', {
  src: 'page'
});

// component.js
// 监听 page 的 selected 事件
this.on('selected|page', (e) => {
  console.log(e.src); // page
});
// 监听 app 的 selected 事件
this.on('selected|app', (e) => {
  console.log(e.src); // app
});

组件之间通信

利用页面事件作为中转

// a => page => b

// a.js
this.emit('a:selected|page', {
  src: 'a'
});

// b.js
this.on('a:selected|page', (a) => {
  console.log(e.src); // a
});

事件命名

prefix:event|broadcast

  • event: 事件名称
  • prefix: 自定义组件前缀,用于区分来源,默认为空
  • broadcast: 监听从页面或者应用触发的事件,或者触发事件传播至页面或应用,只有两个值,pageapp,默认为空

开发

  1. yarn 或者 ayarn阿里内网)安装依赖
  2. 小程序 IDE 打开组件(下载地址

更多命令

  • miapp newbranch: 新建分支
  • miapp push: 提交代码
  • miapp prepub: 预发(发布 beta 版本)
  • miapp publish: 正式发布