var counter = 0;

function myCounter() {
    counter++;
    document.getElementById("counterDisplay").innerText = counter;
    console.log("vous avez clické!", counter, "times");
}

document.getElementById("clickCounter").addEventListener("click", myCounter)

function changeFontSize() {
    var newSize = document.getElementById("textSize").value + "px";
    var paragraphs = document.getElementsByTagName("p");

    for(var i=0; i<paragraphs.length; i++) {paragraphs[i].style.fontSize = newSize;}
}
document.getElementById("textSize").addEventListener("input", changeFontSize)