var call = require('../internals/function-call'); var isCallable = require('../internals/is-callable'); var isObject = require('../internals/is-object'); var $TypeError = TypeError; // `OrdinaryToPrimitive` abstract operation // https://tc39.es/ecma262/#sec-ordinarytoprimitive module.exports = function (input, pref) { var fn, val; if (pref === 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val; if (isCallable(fn = input.valueOf) && !isObject(val = call(fn, input))) return val; if (pref !== 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val; throw $TypeError("Can't convert object to primitive value"); };