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  Gestion des événements souris

<p id="p1" class="gris">
  Ce paragraphe possède deux listeners. Le premier est sur le document entier, le second est sur ce paragraphe uniquement.</p>

<p>Le bouton ci-dessous enlève le listener du document.</p>

<button onclick="removeHandler()">Enlève listener bubbling du document</button>
<button onclick="removeHandler2()">Enlève listener capturing du document</button>

<p>Listener global:
  <div id="globx">X : </div>
  <div id="globy">Y : </div>

<p>Listener du premier paragagraphe:
  <div id="lp1"></div>
  <div id="lp2"></div>


                .gris {background-color:lightblue;}


                document.addEventListener("mousemove", fn);
document.addEventListener("mousemove", fn1, true);

var p = document.getElementById("p1");
p.addEventListener("mousemove", fn2);
p.addEventListener("mousemove", fn3);

function fn(e) {
  document.getElementById("globx").innerHTML = "X : " + e.clientX;
function fn1(e) {
  document.getElementById("globy").innerHTML = "Y : " + e.clientY;
function fn2(e) {
  document.getElementById("lp1").innerHTML = "X : " + e.clientX + ", Y : " + e.clientY;
function fn3(e) {
  let x = e.clientX - p.offsetLeft;
  let y = e.clientY - p.offsetTop;
  document.getElementById("lp2").innerHTML = "X : " + x + ", Y : " + y;

function removeHandler() {
  document.removeEventListener("mousemove", fn);
function removeHandler2() {
  document.removeEventListener("mousemove", fn1, true);