Js regular matching numbers can only be 8 or 11 digits

ask that JS regular matching numbers can only be 8 digits or 11 digits, not 8 to 11 digits, either 8 digits or 11 digits. Nine or ten are not allowed.


^ (\ d {8} |\ d {11}) $


/ ^\ d {8} (\ d {3}) {0code 1} $/


/^\d{8}(\d{3})?$/g

^(?:\d{8}|\d{11})$
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