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but-base

v1.4.2

Published

不过是基类

Downloads

24

Readme

不过是一个基类

使用方式

npm install --save but-base

继承

import ButBase from 'but-base'

class Component extends ButBase {
  
}

Component.name === 'Component'

const component = new Component()

使用描述项生成

import ButBase from 'but-base'

const Component = ButBase.compile({
  // 构造函数的名字,缺省为Component
  name: 'Component'
})

Component.name === 'Component'

const component = new Component()

功能

数据存储

添加数据

component.data('key', 'sth')

component.data('key') === 'sth'

移除数据

const removedData = component.removeData('key')

removedData === 'sth'

component.data('key') === undefined

事件

监听

component.on('key', function (arg1, arg2) {
  this === component
  arg1 === 'foo'
  arg2 === 'bar'
})

component.fire('key', ['foo', 'bar'])

改变监听函数的上下文

const person = {
  name: 'butSalt'
}

component.on('key', function (arg1, arg2) {
  this === person
}, person)

component.fire('key')

监听一次

component.once('key', function () {
  // 这个函数只会被调用一次
})

component.fire('key')
component.fire('key')

移除监听

// 移除指定namespace下的所有监听函数
component.un('key')

// 移除指定namespace下的指定监听函数
component.un('key', handler)

模板

模板实例化

class Component extends ButBase {
  getTemplate() {
    return '<div></div>'
  }
}

const component = new Component()

// 获取根据模板自动实例化dom/svg元素,默认为null
component.getEl()

挂载

new Component({
  // 根据selector查找容器,组件的dom会挂载到容器下
  el: '#target'
})

new Component({
  // 直接传dom对象也可以
  el: dom
})

// 也可通过此方法进行挂载
component.mountTo('#target')

卸载

// 通过调用此方法卸载组件的dom
component.unmount()

配置

一般使用方式

class Component extends ButBase {
  updateFoo() {
    const { foo } = this.config()
  }
  updateBar() {
    const { bar } = this.config()
  }
}

const component = new Component()

// 当配置更新时,对应的update方法会被调用
component.config({
  foo: 1,
  bar: 2
})

调用config方法时暂时关闭事件机制

class Component extends ButBase {
  updateData() {
    // 当更新config中的data属性时,change事件会被触发
    this.fire('change')
  }
}

const component = new Component()

// change事件会被触发
component
  .config({
    data: {}
  })

// 屏蔽了config方法调用过程中的所有事件,change事件不会触发
component
  .config(
    {
      data: {}
    },
    true
  )

控制更新方法的执行先后顺序

class Component extends ButBase {
  updateFirst() {

  }
  updateSecond() {

  }
  updateThird() {

  }
  getExecOrder() {
    return {
      // 当updateFirst被调用时,updateSecond也要被调用
      // updateFirst调用在先,updateSecond调用在后
      updateSecond: ['updateFirst'],
      // 当updateSecond被调用时,updateThird也要被调用
      // updateSecond调用在先,updateThird调用在后
      updateThird: ['updateSecond']
    }
  }
}

const component = new Component()

// updateFirst -> updateSecond -> updateThird
component.config({
  third: true,
  second: true,
  first: true
})

// updateFirst -> updateSecond -> updateThird
component.config({
  first: true
})

// updateSecond -> updateThird
component.config({
  second: true
})

组件默认配置

class Component extends ButBase {
  updateFoo() {

  }
  updateBar() {

  }
  // 默认配置
  getDefaultConfig() {
    return {
      foo: true
    }
  }
}

const component = new Component({
  bar: true
})

// 实例化组件时传递的配置 覆盖 默认配置
// 接着,组件会使用这份合并后的配置首次调用对应的update方法
{
  foo: true,
  bar: true
}

组件初始化配置

class Component extends ButBase {
  inited() {
    // 在此声明周期中返回的对象会被认为是配置
    return {
      goo: true
    }
  }
  getDefaultConfig() {
    // 默认配置
    return {
      foo: true
    }
  }
}

const component = new Component({
  baz: true
})

// 初始化配置 覆盖 默认配置
// 实例化组件时传递的配置 覆盖 初始化配置
// 接着,组件会使用这份合并后的配置首次调用对应的update方法
{
  foo: true,
  bar: true,
  baz: true
}

配置合并逻辑

component.config({
  arr: [1, 2, 3],
  obj: {
    foo: true
  },
  dataA: {
    foo: true
  },
  bData: {
    foo: true
  }
})

component.config({
  // 数组直接覆盖
  arr: [4, 5, 6],
  // 对象会进行合并
  obj: {
    bar: true
  },
  // 属性名中含有'data'的直接覆盖
  dataA: {
    bar: true
  },
  // 属性名中含有'data'的直接覆盖
  bData: {
    bar: true
  }
})

// 合并后的配置
{
  arr: [4, 5, 6],
  obj: {
    foo: true,
    bar: true
  },
  dataA: {
    bar: true
  },
  bData: {
    bar: true
  }
}

生命周期

class Component extends ButBase {
  // 触发于:
  //   features加载之前
  //   触发于配置初始化之前
  beforeInit() {
    // do sth
  }
  // 触发于:
  //   features加载之后
  //   配置初始化完毕之后
  //   使用component.config方法调用各个update方法之前
  //   使用component.mountTo挂载组件的dom之前
  inited() {
    // do sth
  }
  // 触发于:
  //   features销毁之前
  //   配置销毁之前
  beforeDestroy() {
    // do sth
  }
  // 触发于:
  //   features销毁完之后
  //   配置销毁完成之后
  destroyed() {
    // do sth
  }
}

注册插件

const plugin = function mounter(ButBase, config) {
  // ButBase是我们的基类
  // config是调用ButBase.use时的第二个传参,如果调用时没有传则是一个空对象

  if (config.foo === true) {
    // do sth
  }
}

// plugin函数会被调用
ButBase.use(plugin, {
  foo: true
})