flow like the river

VISUALIZACION/node_modules/es-abstract/2023/GetIteratorFromMethod.js

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+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var Call = require('./Call');
+var GetV = require('./GetV');
+var IsCallable = require('./IsCallable');
+var Type = require('./Type');
+
+// 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 (Type(iterator) !== 'Object') {
+		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
+	};
+};