RangeError: repeat count must be less than infinity
The JavaScript exception "repeat count must be less than infinity" occurs when the
String.prototype.repeat()
method is used with a count
argument that is infinity.
Message
RangeError: argument out of range (Edge)
RangeError: repeat count must be less than infinity and not overflow maximum string size (Firefox)
RangeError: Invalid count value (Chrome)
Error type
What went wrong?
The String.prototype.repeat()
method has been used. It has a
count
parameter indicating the number of times to repeat the string. It
must be between 0 and less than positive Infinity
and cannot be a negative
number. The range of allowed values can be described like this: [0, +∞).
The resulting string can also not be larger than the maximum string size, which can
differ in JavaScript engines. In Firefox (SpiderMonkey) the maximum string size is
2^28 - 1 (0xFFFFFFF
).
Examples
Invalid cases
'abc'.repeat(Infinity); // RangeError
'a'.repeat(2**28); // 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)