Based off the diagram, what happens first, the ‘render’ or the componentDidMount?
The diagram shows that the
rendercomes before thecomponentDidMount.
What is the very first thing to happen in the lifecycle of React?
The very first thing to happen in the lifecycle of a React component is the “mounting” phase. This is when the component is initialized and inserted into the DOM.
Put the following things in the order that they happen: componentDidMount, render, constructor, componentWillUnmount, React Updates
Constructor: This is called when a component is initialized and sets up the initial state and props.
Render: This is called during the “mounting” and “updating” phases, and returns a description of the component’s UI in the form of a React element.
ComponentDidMount: This is called immediately after a component is mounted into the DOM, and is often used to fetch data or set up event listeners.
React Updates: During the “updating” phase, React may update the props or state of a component based on changes in the application. This triggers a re-render of the component, starting again with the render method.
ComponentWillUnmount: This is called immediately before a component is unmounted from the DOM, and is often used to clean up any resources used by the component, such as event listeners.
What does componentDidMount do?
componentDidMountis a React component lifecycle method that is called immediately after a component is mounted into the DOM, and is often used to fetch data or set up event listeners.
What types of things can you pass in the props?
In React, you can pass various types of data in the props of a component, including strings, numbers, booleans, objects, arrays, functions, and other React elements. Props are read-only and cannot be modified by the child component directly.
What is the big difference between props and state?
In React, props are passed down from a parent component to a child component and are read-only, while state is managed within a component and can be updated by the component itself.
When do we re-render our application?
In React, a component is re-rendered when its state or props change. The re-rendering can also be triggered by changes in the parent component that cascade down to the child component via props.
What are some examples of things that we could store in state?
In React, we can store various types of data in state, including form inputs, user events, UI state (such as whether a modal is open or closed), and data fetched from an API or received from a parent component via props.