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I realize the super keyword can be used to call functions in a parent component. However, I'm not totally clear why you would use the super keyword in the example below - just passing it whatever props are being passed to the constructor.
Can someone please shed some light on the various reasons for using the super keyword in an ES6 class constructor, in react?
constructor(props) {
super(props);
this.state = {
course: Object.assign({}, this.props.course),
errors: { }
};
this.updateCourseState = this.updateCourseState.bind(this);
}
607
super() is used to call the parent constructor. super(props) would pass props to the parent constructor. From your example, super(props) would call the React. Component constructor passing in props as the argument.
When we call this super(props), we are basically calling the constructor of React. Component. So we can say that super() is a reference to the parent class constructor i.e. React. Component in the above example, which is also the base class for Person component.
In React, the constructor is called during component creation and before mounting. If you want to implement the constructor for a React component, call the super(props) method before any other statement. Otherwise, this. props will be undefined in the constructor and create bugs.
super allows you to access the constructor method of the parent class. The only reason to include props is to access this.props inside of your constructor.
What's the difference between "super()" and "super(props)" in React when using es6 classes?
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