var element = document.getElementById("element");
element.style.transition = "all 0.4s ease"
element.style.width = "0px";
var toggle = document.getElementById("toggle");
var toggleFunc = function() {
if (element.style.width === "0px") {
element.style.width = "100px";
} else {
element.style.width = "0px";
}
};
toggle.addEventListener("click", toggleFunc);
document.addEventListener('DOMContentLoaded', toggleFunc, false);
