nl_tokens: ES6 20 . 1 . 3 . 5 Number . prototype . toPrecision ( precision )
pl_tokens: function NumberToPrecisionJS ( precision ) { <mask> x = this ; if ( ! IS_NUMBER ( this ) ) { if ( ! IS_NUMBER_WRAPPER ( this ) ) { throw MakeTypeError ( kIncompatibleMethodReceiver , "Number.prototype.toPrecision" , this ) ; } // Get the value of this number in case it's an object. x = % _ValueOf ( this ) ; } if ( IS_UNDEFINED ( precision ) ) return TO_STRING ( x ) ; var p = TO_INTEGER ( precision ) ; if ( NUMBER_IS_NAN ( x ) ) return "NaN" ; if ( x == INFINITY ) return "Infinity" ; if ( x == - INFINITY ) return "-Infinity" ; if ( p < 1 || p > 21 ) { throw MakeRangeError ( kToPrecisionFormatRange ) ; } return % NumberToPrecision ( x , p ) ; }