Anil Singh | Code-sample.com

The getDerivedStateFromProps Method  - The getDerivedStateFromProps() method is called first when a component gets updated. This is still the natural place to set the  state  object based on the initial  props . Explore to Understand   -  React Lifecycle Components After changes the color to blue, but since the getDerivedStateFromProps() method is called, which updates the state with the color from the color attribute, the color is still rendered as yellow.  See the below example , class   Header   extends   React . Component  {      constructor ( props ) {        super ( props );        this . state  = { color:   "red" };     }      static   getDerivedStateFromProps ( props ,  state ) {        return  { col...

The getDerivedStateFromProps Method  - The  getDerivedStateFromProps()  method is called before rendering the elements in the DOM. The  getDerivedStateFromProps()  method is called right before the render method and after the constructor method. We can set the state object based on the initial props and it takes state as an argument, and returns an object with changes to the state. Explore to Understand   -  React Lifecycle Components We can update the constructor state in the  getDerivedStateFromProps()  method. As an Example , public   class   Header   extends   React . Component  {    constructor ( props ) {      super ( props );      this . state  = { msg:   "welcome!" };   }    static   getDerivedStateFromProps ( props ,  state ) {      return ...