for (const e of a)

for (const i = 0; i < a.length; i += 1)

{
    const __it = a[Symbol.iterator]();
    let __res;
    while ((__res = __it.next()) && !__res.done) {
        const e = __res.value;
        …
    }
}

{
    const i = 0;
    while (i < a.length) {
        …
        i += 1;
    }
}

for (var i = 0, otherVar = ""; i < [1,2,3,4].length; i += 1){
  console.log(otherVar)
  otherVar = "If otherVar was initialized on each iteration, then you would never read me.";
}

for(const i = 0;;){ break }
for(const i = 0; i < 10;){ break; }

for(const i = 0;;){ ++i; break; }
for(const i = 0;;++i){ if(i > 0) break; }