2311061106/frontend/node_modules/es-abstract/2024/GetIteratorFromMethod.js
23175 b8b09fd9d4
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完成作业
2025-12-14 16:02:40 +08:00

29 lines
738 B
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var isObject = require('es-object-atoms/isObject');
var Call = require('./Call');
var Get = require('./Get');
var IsCallable = require('./IsCallable');
// https://262.ecma-international.org/15.0/#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 = Get(iterator, 'next'); // step 3
return { // steps 4-5
'[[Iterator]]': iterator,
'[[NextMethod]]': nextMethod,
'[[Done]]': false
};
};