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ECMAScript spec abstract operations.

There is a newer version: 1.22.3

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $TypeError = GetIntrinsic('%TypeError%');

var GetV = require('./GetV');
var IsCallable = require('./IsCallable');
var IsPropertyKey = require('./IsPropertyKey');

var inspect = require('object-inspect');

// https://262.ecma-international.org/6.0/#sec-getmethod

module.exports = function GetMethod(O, P) {
	// 7.3.9.1
	if (!IsPropertyKey(P)) {
		throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
	}

	// 7.3.9.2
	var func = GetV(O, P);

	// 7.3.9.4
	if (func == null) {
		return void 0;
	}

	// 7.3.9.5
	if (!IsCallable(func)) {
		throw new $TypeError(inspect(P) + ' is not a function: ' + inspect(func));
	}

	// 7.3.9.6
	return func;
};