closure js

var once =async function() {
    if(once.done){
        console.log("doing it on realease of done")
        return
    };
    once.done = true;
    await inner().then((result) =>{
        console.log(result)
        once.done =false})
};

const inner =async function(){
    setTimeout(await  inner,5000)
    clearTimeout(inner);
    return "Doing it once";
}
once();
once();
once();