12i task #124
Description
<title>App</title>
add
remove
<script>
// i is refer to messages number
let i = 0;
let intervalID;
check();
function check (){
clearInterval(intervalID);
if (i > 0 ) {
intervalID = setInterval(
function(){
if(document.title ==='App'){
document.title = `(${i}) new messages`
}else {
document.title = 'App'
}
}
,2000)
} else if (i <= 0) {
document.title = 'App'
}
}
function addMessage (){
i++;
console.log(i);
check();
}
function removeMessage (){
i--;
console.log(i);
check();
}
</script>