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State and Props

React Lifecycle

  1. Based off the diagram, what happens first, the ‘render’ or the ‘componentDidMount’?
    • render will come before 'componentDidMount'
  2. What is the very first thing to happen in the lifecycle of React?
    • Mounting is the very first thing to occur in the lifecycle of React. Below is the flow of the Mounting phase:
      Mounting Phase:
      • Constructor, static, getDerivedStateFromProps, render, componentDidMount, and UNSAFE_componentWillMount.

  3. Put the following things in the order that they happen: componentDidMount, render, constructor, componentWillUnmount, React Updates

  4. What does componentDidMount do?
    • This is a method that is invoked immediately after acomponent is mounted. If something is being loaded to a network request or being initiailized by the DOM then it needs to go in the componentDidMount().