更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/es-abstract/2018/ValidateAtomicAccess.js

@@ -0,0 +1,34 @@
+'use strict';
+
+var $RangeError = require('es-errors/range');
+var $TypeError = require('es-errors/type');
+
+var ToIndex = require('./ToIndex');
+
+var isTypedArray = require('is-typed-array');
+var typedArrayLength = require('typed-array-length');
+
+// https://262.ecma-international.org/8.0/#sec-validateatomicaccess
+
+module.exports = function ValidateAtomicAccess(typedArray, requestIndex) {
+	if (!isTypedArray(typedArray)) {
+		throw new $TypeError('Assertion failed: `typedArray` must be a TypedArray'); // step 1
+	}
+
+	var accessIndex = ToIndex(requestIndex); // step 2
+
+	var length = typedArrayLength(typedArray); // step 3
+
+	/*
+	// this assertion can never be reached
+	if (!(accessIndex >= 0)) {
+		throw new $TypeError('Assertion failed: accessIndex >= 0'); // step 4
+	}
+	*/
+
+	if (accessIndex >= length) {
+		throw new $RangeError('index out of range'); // step 5
+	}
+
+	return accessIndex; // step 6
+};