I want to make h1 disappear and after 3 sec appear again. It disappears but dont appear again. Or do i need inline style for it? And any other useful loop for this except if?
let head1 = document.querySelector(".asd")
let head1style = getComputedStyle(head1);
let head1disp = head1style.display;
let changedisp = function() {
if (head1disp === "block") {
head1.style.display = "none";
} else if (head1disp === "none") {
head1.style.display = "block"
} else {
console.log("Something Wrong!")
}
};
setInterval(changedisp, 3000);h1 {
display: block;
}<body>
<h1 class="asd">Look at me!</h1>
<script src="app.js"></script>
</body>
</html>You don't need JavaScript for that in a modern browser. CSS animations with keyframes are fully capable of delivering the same effect:
<style>
@keyframes fade-out-in {
0% {
opacity: 1;
}
25% {
opacity: 0;
}
75% {
opacity: 0;
}
100% {
opacity: 1;
}
}
.box {
animation: fade-out-in 5000ms;
/* wait time at the beginning */
animation-delay: 2000ms;
}
</style>
<div class="box">
Hello World
</div>
You will probably need to adjust the timing. Learn more about CSS keyframe animations in this fantastic article - https://www.joshwcomeau.com/animation/keyframe-animations/
You can use setTimeout to do it once.
const h1 = document.querySelector('h1');
h1.style.display = 'none';
setTimeout(() => h1.style.display = 'block', 3000);
Or you can use setInterval to do it every 3 seconds.
const h1 = document.querySelector('h1');
function switchDisplay() {
if (h1.style.display === 'block') h1.style.display = 'none';
else h1.style.display = 'block';
}
setInterval(switchDisplay, 3000);