/react-questions-list

React

  • JSX
  • What React is ?
  • props and state
  • include non react components ( jquery )
  • Rendering render()
  • Lifecycle
    • constructor(), componentWillMount(), componentDidMount()
    • componentWillReceiveProps(), shouldComponentUpdate(), componentWillUpdate(), componentDidUpdate(), componentWillUnmount()
    • setState(), forceUpdate()
  • Function vs Class
  • key ( unique, index, noKeys, staticLists )
  • Immutable
  • setState(updater[, callback]),
  • children ( this.props.children )
  • Flow
  • Refs ( <input type="text" ref={(input) => { this.textInput = input; }} /> -> this.textInput.focus(); )
this.setState((prevState, props) => {
  return {counter: prevState.counter + props.step};
});
  • defaultProps
  • PropTypes
import PropTypes from 'prop-types';

class Greeting extends React.Component {

  static propTypes = {
    loading: PropTypes.bool.isRequired,
  };

  render() {
    return (
      <h1>Hello, {this.props.name}</h1>
    );
  }
}

Greeting.propTypes = {
  name: PropTypes.string
};

Greeting.defaultProps = {
  name: 'Stranger'
};

FORMS

class NameForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {value: ''};

    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }

  handleChange(event) {
    this.setState({value: event.target.value});
  }

  handleSubmit(event) {
    alert('A name was submitted: ' + this.state.value);
    event.preventDefault();
  }

  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <label>
          Name:
          <input type="text" value={this.state.value} onChange={this.handleChange} />
        </label>
        <input type="submit" value="Submit" />
      </form>
    );
  }
}
  • what do you use for forms ?

HTTP(s)

  • methods ( GET, POST, PUT, PATCH, 'DELETE' )
  • status codes
  • file upload
  • progress

Redux

  • Actions ( const ADD_TODO = 'ADD_TODO' )
  • Action Creators
function addTodo(text) {
  return {
    type: ADD_TODO,
    text
  }
}
  • Reducers
function todoApp(state = initialState, action) {
  switch (action.type) {
    case SET_VISIBILITY_FILTER:
      return Object.assign({}, state, {
        visibilityFilter: action.filter
      })
    default:
      return state
  }
}
  • Store ( dispatch, subscribe, unsubscribe )
  • Asynchronous

Thunk vs Saga