number-arg-out-of-range.md

tags	recommended

Disallows out-of-range radix or precision arguments to Number formatting methods.

Several Number.prototype methods accept a bounded integer argument and throw a RangeError when it falls outside the allowed range:

• toString(radix) — radix must be between 2 and 36.
• toFixed(digits) and toExponential(digits) — digits must be between 0 and 20 (100 in some engines, but 0–20 is the portable range).
• toPrecision(precision) — precision must be between 1 and 21.

Passing a literal outside these ranges is always a runtime error.

Invalid:

(42).toString(64);
(42).toString(1);
(3.14159).toPrecision(0);

Valid:

(42).toString(16);
(3.14159).toFixed(2);