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<button id="clikMeUp">click Me to Increment!</button>
<button id="clikMeDown">click Me to decrement!</button>
<span class="here_incr"></span>
<script>
var up = document.getElementById('clikMeUp');
var down = document.getElementById('clikMeDown');
var count = 0;
down.disabled = true;
up.addEventListener('click' , ()=>{
count += 1;
if (count > 0){
down.disabled = false;
}
else {
down.disabled = true;
}
document.querySelector('.here_incr').innerHTML = count;
})
down.addEventListener('click' , ()=>{
count -= 1;
if (count <= 0){
down.disabled = true;
}
document.querySelector('.here_incr').innerHTML = count;
})
</script>
Increment and Decrement counter javascript