RangeError: repeat count must be less than infinity

Message

RangeError: repeat count must be less than infinity and not overflow maximum string size (Firefox)

RangeError: Invalid count value (Chrome)

Error type

RangeError

What went wrong?

You were using the 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 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 2²⁸ -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)

See also

• String.prototype.repeat()