Помогите плиз, каким способом привязать к кнопке функцию
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Воркшоп - Тестирование</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="kvadrat"></div>
<button id="knopka">Нажми на меня</button>
<button id="razmer">Размер</button>
<script src="script.js"></script>
</body>
</html>
knopka = document.querySelector("button");
knopka.innerText = "Сlick me";
knopka.style.background = "purple"
kvadrat = document.querySelector("#kvadrat")
if(kvadrat.style.background == "" || kvadrat.style.background == "red" ) {
kvadrat.style.background = "green"
} else {
kvadrat.style.background = "red"
}
knopka.onclick = function() {
if(kvadrat.style.background == "" || kvadrat.style.background == "red" ) {
kvadrat.style.background = "green"
} else {
kvadrat.style.background = "red"
}
};
razmer.style.background = "yellow"
document.querySelector("#razmer")
console.dir(razmer)
button.onclick = function() {kvadrat.style.width == "100px"}