Web Reference: Jun 4, 2020 · ECMAScript 6 入门目录其他 《ECMAScript 6入门》是一本开源的 JavaScript 语言教程,全面介绍 ECMAScript 6 新增的语法特性。 概述 《ECMAScript 6入门》是一本开源的 JavaScript 语言教程,全面介绍 ECMAScript 6 新增的语法特性。 这就是 ES6 引入 Symbol 的原因。 ES6 引入了一种新的原始数据类型 Symbol,表示独一无二的值。 它是 JavaScript 语言的第七种数据类型,前六种是: undefined 、 null 、布尔值(Boolean)、字符串(String)、数值(Number)、对象(Object)。 Symbol 值通过 Symbol 函数生成。
YouTube Excerpt: 00:18 POJO (Plain Old JavaScript
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Es6 Tutorial 5 Object Props Net Worth 2026: Salary, Income & Wealth Net Worth & Biography

Estimated Worth: $31M - $56M
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Last Updated: April 11, 2026
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