{{jsSidebar("Errors")}}
Message
RangeError: repeat count must be non-negative (Firefox) RangeError: Invalid count value (Chrome)
Error type
{{jsxref("RangeError")}}
What went wrong?
You were using the {{jsxref("String.prototype.repeat()")}} method. The count
parameter indicates the number of times to repeat the string. It must be between 0 and less than positive {{jsxref("Infinity")}} and cannot be a negative number. The range of allowed values can be described like this: [0, +∞).
Examples
Invalid cases
'abc'.repeat(-1); // RangeError
Valid cases
'abc'.repeat(0); // '' 'abc'.repeat(1); // 'abc' 'abc'.repeat(2); // 'abcabc' 'abc'.repeat(3.5); // 'abcabcabc' (count will be converted to integer)
See also
- {{jsxref("String.prototype.repeat()")}}