Javascript – The setState method is used to update a single state variable at a time. IS this statement True or False. if true why?

The setState can update the entire state of the component. Let’s say you have a component:

class App extends Component { 
  constructor(props){ 
    super(props) 
        
    // Set initial state 
    this.state = {
      name: "Nil",
      age: "0",
      score: "0"
    } 
  }
      
  render(){ 
    return ( 
      //... 
    ) 
  } 
}

Using the setState method you can update 1,2 or all 3 state variables by calling it:

    this.setState({
      name: 'Bob',
      age: '18',
      score: '30'
    }) 

So yes the setState accepts only 1 input argument, but that input argument is the object representing the entire state of the component