[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/es-abstract/2019/Get.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var inspect = require('object-inspect');
+
+var isPropertyKey = require('../helpers/isPropertyKey');
+
+var isObject = require('es-object-atoms/isObject');
+
+// https://262.ecma-international.org/6.0/#sec-get-o-p
+
+module.exports = function Get(O, P) {
+	// 7.3.1.1
+	if (!isObject(O)) {
+		throw new $TypeError('Assertion failed: Type(O) is not Object');
+	}
+	// 7.3.1.2
+	if (!isPropertyKey(P)) {
+		throw new $TypeError('Assertion failed: P is not a Property Key, got ' + inspect(P));
+	}
+	// 7.3.1.3
+	return O[P];
+};