index.html

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    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>JS varialbe</title>

    <script>

      const moyenne = (notes) => {
        let sum = 0 
        for (let note of notes){
          sum = sum + note
        }
        return sum / notes.lenght
      }
      
      class Student {
        ecole = 'Jules Ferry'
        _notes = []


        constructor(firstname, lastname) {
          this.firstname = firstname
          this.lastname = lastname
        }

        set notes (v) {
          if(Array.isArray(v)){
            this.notes = v
          }
        }

        get name () {
          return `${this.firstname} ${this.lastname}`
        }


        canPass () {
         return moyenne(this.notes) >= 10
        }

        static moyenne = 10

      
      }
      const john = new Student('John', 'Doe')
      const chloe = new Student('Chloé', 'Papin')
      john.notes([10, 12, 9])
      chloe.notes([15, 13, 20])
      console.log(john.canPass(), chloe.canPass())

    </script>
  </head> 🍋 
  <body>
    <h1>Exo JavaScript</h1>
    <h2> Les classes </h2>
    <p>Check la console !</p>
  </body>
</html>