let ligneAll = document.getElementsByClassName('ligne');
for (let ligne of ligneAll) {
ligne.addEventListener("click", changeclr);
}
function changeclr(){
let ligneHihlighted = document.getElementsByClassName('highlight')[0];
if (ligneHihlighted) {
ligneHihlighted.classList.remove("highlight");
}
this.classList.add("highlight");
}
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