Taro: 微信端警告: 请给页面提供初始 `state` 以提高初次渲染性能！Cannot read property 'triggerEvent' of undefined

Created on 14 Jan 2019 · 4Comments · Source: NervJS/taro

问题描述
特定情况下(见下图), 微信页面报警告:

import Taro, { Component } from '@tarojs/taro'
import { View } from '@tarojs/components'

export default class TestPage extends Component {

  config = {
    navigationBarTitleText: 'echarts-for-weixin 示例项目',
  }

  static defaultProps = {
    onGetStyles: () => { return {} },
  }

  render () {
    return (
      <View
        className='echarts'
        style={{...this.props.onGetStyles()}}
      >
      </View>
    )
  }
}

系统信息

操作系统: [Windows 10]
Taro 版本 [v1.2.4]
Node.js 版本 [10.4.0 - c:\program files\nodejs\node.EXE]
报错平台 [weapp]

补充信息
若采用这种写法则不会报警告:

import Taro, { Component } from '@tarojs/taro'
import { View } from '@tarojs/components'

export default class TestPage extends Component {

  config = {
    navigationBarTitleText: 'echarts-for-weixin 示例项目',
  }

  render () {
    const {
      onGetStyles = () => { return {} },
    } = this.state

    return (
      <View
        className='echarts'
        style={onGetStyles()}
      >
      </View>
    )
  }
}

Source