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                <!DOCTYPE html>
        <title>Cours JavaScript</title>
        <meta charset="utf-8">
        <meta name="viewport"
          content="width=device-width, initial-scale=1, user-scalable=no">
        <link rel="stylesheet" href="cours.css">
        <script src='cours.js' async></script>
        <h1>Titre principal</h1>
        <p>Un paragraphe</p>
        <p id='p1'></p>
        <p id='p2'></p>
        <p id='p3'></p>




                //Deux valeurs primitives
let ch1 = 'Une chaine de caractères';
let ch2 = 'Une chaine de caractères';

//true car les deux valeurs (et les types) sont égaux
document.getElementById('p1').innerHTML = 'ch1 == ch2 ? : ' + (ch1 === ch2); 

//Trois objets
let ob1 = {prenom : 'Pierre'};
let obj2 = {prenom : 'Pierre'};
let ob3 = objet1;

//false car les deux objets ne font pas référence aux mêmes membres
document.getElementById('p2').innerHTML = 'ob1 === ob2 ? : ' + (ob1 === ob2); 

//true car les deux objets font  référence aux mêmes membres
document.getElementById('p3').innerHTML = 'ob1 === ob3 ? : ' + (ob1 === ob3);