Symbol.prototype.description - JavaScript 编辑

description 是一个只读属性，它会返回 Symbol 对象的可选描述的字符串。

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

语法

Symbol('myDescription').description;
Symbol.iterator.description;
Symbol.for('foo').description;

描述

Symbol 对象可以通过一个可选的描述创建，可用于调试，但不能用于访问 symbol 本身。Symbol.prototype.description 属性可以用于读取该描述。与 Symbol.prototype.toString() 不同的是它不会包含 "Symbol()" 的字符串。具体请看实例。

实例

Symbol('desc').toString();   // "Symbol(desc)"
Symbol('desc').description;  // "desc"
Symbol('').description;      // ""
Symbol().description;        // undefined

// well-known symbols
Symbol.iterator.toString();  // "Symbol(Symbol.iterator)"
Symbol.iterator.description; // "Symbol.iterator"

// global symbols
Symbol.for('foo').toString();  // "Symbol(foo)"
Symbol.for('foo').description; // "foo"

规范

Specification	Status
get Symbol.prototype.description proposal	Stage 3

浏览器兼容

BCD tables only load in the browser

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

另请参阅

• Symbol.prototype.toString()
• Polyfill: https://npmjs.com/symbol.prototype.description