export default function ucs2length ( str ) { const len = str . length ; let length = 0 ; let pos = 0 ; let value ; while ( pos < len ) { length ++ ; value = str . charCodeAt ( pos ++ ) ; if ( value >= 0xd800 && value <= 0xdbff && pos < len ) { value = str . charCodeAt ( pos ) ; if ( ( value & 0xfc00 ) === 0xdc00 ) pos ++ ; } } return length ; } ucs2length . code = 'require("ajv/dist/runtime/ucs2length").default' ;