taboca/doc-js-stateless-component

Dealing with the notion of stateless components

Study note - stateless components

• https://leanpub.com/doc-js
• If you want to contribute to the book or join me as a coauthor pool, please get in contact mgalli at mgalli dot com subject "doc-js book"

Stateless components and application states

Question - One emerging question here was that right upfront I have stumbled in something called stateless

The following was the kind of component that I was coding, which came out of [1] a React simple todo list example:

import React, { Component } from 'react'
import { connect } from 'react-redux'
import { addList } from '../actions'


import {
    Button,
    View,
    TextInput,
} from 'react-native';

const AddList = () => {
  let input

  this.handleClick = function () {
	// how to access the TextInput?
  }

  return (
    <View>

      <TextInput
              style={{height: 40}}
              placeholder="This is a text" ref="myInput"
            />

      <Button
       onPress={this.handleClick}
       title="Click handler"
       color="gray"
       accessibilityLabel="Click this button to access the handler"
      />
  </View>
  )
}

export default connect()(AddList)

Where the arguments come from? - and the concept destructuring in the context of React

Let's look at the following example:

import React from ‘react’;

const HelloWorld = ({name}) => (
 <div>{`Hi ${name}`}</div>
);

export default HelloWorld;

Which was taken from [2016 Cory]. This is an example of a functional component; that, because this is mostly a function that is being used in the context of React as a component to render data based on certain inputs - with no logic.

2016 Cory

Now, a question is "where does name come from?"

First, we need to look at destructuring, of Destructuring assignment [1].

1

Stateless components - WTF are the arguments?

• Suddently there is a function in there, such as "dispatch", for accessing the necessary infrastructure of communication with the store;

• Suddently some of the samples show some properties;

• Is this related to React vs React Redux;

• Is this related to ES6