GetIteratorFromMethod.jsā¢741 B
'use strict';
var $TypeError = require('es-errors/type');
var isObject = require('es-object-atoms/isObject');
var Call = require('./Call');
var GetV = require('./GetV');
var IsCallable = require('./IsCallable');
// https://262.ecma-international.org/14.0/#sec-getiteratorfrommethod
module.exports = function GetIteratorFromMethod(obj, method) {
if (!IsCallable(method)) {
throw new $TypeError('method must be a function');
}
var iterator = Call(method, obj); // step 1
if (!isObject(iterator)) {
throw new $TypeError('iterator must return an object'); // step 2
}
var nextMethod = GetV(iterator, 'next'); // step 3
return { // steps 4-5
'[[Iterator]]': iterator,
'[[NextMethod]]': nextMethod,
'[[Done]]': false
};
};