(/=)

let a = 3;

a /= 2;
console.log(a);
// : 1.5

a /= 0;
console.log(a);
// : Infinity

a /= "hello";
console.log(a);
// : NaN

x /= y

let bar = 5;

bar /= 2; // 2.5
bar /= 2; // 1.25
bar /= 0; // Infinity

let bar = 5;
bar /= "2"; // 2.5
bar /= "foo"; // NaN

let foo = 3n;
foo /= 2n; // 1n
foo /= 2n; // 0n

foo /= 0n; // RangeError: BigInt division by zero
foo /= 1; // TypeError: Cannot mix BigInt and other types, use explicit conversions