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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                <!DOCTYPE html>
<html>
    <head>
        <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>
    </head>
    
    <body>
        <h1>Titre principal</h1>
        <p>Un paragraphe</p>
        <p id='p1'></p>
        <p id='p2'></p>
        <p id='p3'></p>
        <p id='p4'></p>
        <p id='p5'></p>
    </body>
</html>
              
            
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CSS

              
                
              
            
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JS

              
                //On déclare deux variables globales
let x = 5;
var y = 10;

//On définit une première fonction qui utilise les variables globales
function portee1(){
    document.getElementById('p1').innerHTML =
    'Depuis portee1() : <br>x = ' + x + '<br>y = ' + y;
}
//On définit une deuxième fonction qui définit des variables locales
function portee2(){
    let a = 1;
    var b = 2;
    document.getElementById('p2').innerHTML =
    'Depuis portee2() : <br> a = ' + a + '<br>b = ' + b;
}
//On définit une troisième fonction qui défnit également des variables locales
function portee3(){
    let x = 20;
    var y = 40;
    document.getElementById('p3').innerHTML =
    'Depuis portee3() : <br>x = ' + x + '<br>y = ' + y;
}

//On pense bien à exécuter nos fonctions !
portee1();
portee2();
portee3();

//On tente d'afficher des variables globales puis locales depuis l'espace global
document.getElementById('p4').innerHTML =
'Depuis l\'espace global : <br>x = ' + x + '<br>y = ' + y;

document.getElementById('p5').innerHTML =
'Depuis l\'espace global : <br>a = ' + a + '<br>b = ' + b;
              
            
!
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