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                <!DOCTYPE html>
        <title>Cours JavaScript</title>
        <meta charset="utf-8">
        <link rel="stylesheet" href="cours.css">
        <script src='cours.js' async></script>
        <h1>Titre principal</h1>
        <p id='p0'></p>
        <p id='p1'></p>
        <p id='p2'></p>
        <p id='p3'></p>




                let chaine = 'Bonjour, je suis ^Pierre^. Mon /numéro/ est le [06-36-65-65-65]';
let masque1 = /\w/g; //Correspond à un caractère alphanumérique ou "_"
let masque2 = /\W/g; //Corrrespond à tout sauf un caractère alphanumérique ou "_"
let masque3 = /\d/g; //Correspond à un chiffre
let masque4 = /[\da-z]/g; //Correspond à un chiffre ou à une lettre minuscule

let p0 = document.getElementById('p0');
let p1 = document.getElementById('p1');

p0.textContent = chaine;
p1.innerHTML =
    'Lettre, chiffre, ou "_" : ' +  chaine.match(masque1) +
    '<br>Tout sauf une lettre, un chiffre ou "_" : ' +  chaine.match(masque2) +
    '<br>Chiffre : ' +  chaine.match(masque3) +
    '<br>Chiffre ou lettre minuscule : ' +  chaine.match(masque4);