Add a new line to your constructor() method to bind handleClick().

Réponse

this.handleClick = this.handleClick.bind(this);

Colonne
Je sais bien
Explication

You just created a new method, that you will eventually use as an event handler. Your new method uses this.

That means that you need to bind your new method.

Question

Add a new line to your constructor() method to bind handleClick().

Thématique
react .js