symbol-description
需要符号说明
Symbol 函数可能有一个可选的描述：
🌐 The Symbol function may have an optional description:
const foo = Symbol("some description");
const someString = "some description";
const bar = Symbol(someString);
使用 description 可以更容易调试：当一个符号被记录时，会使用其描述：
🌐 Using description promotes easier debugging: when a symbol is logged the description is used:
const foo = Symbol("some description");
> console.log(foo);
// Symbol(some description)
当在调试期间观察到符号时，它可能有助于识别符号。
🌐 It may facilitate identifying symbols when one is observed during debugging.
规则详情
🌐 Rule Details
此规则在创建符号时需要描述。
🌐 This rules requires a description when creating symbols.
此规则的错误代码示例：
🌐 Examples of incorrect code for this rule:
/*eslint symbol-description: "error"*/
const foo = Symbol();
符合此规则的正确代码示例：
🌐 Examples of correct code for this rule:
/*eslint symbol-description: "error"*/
const foo = Symbol("some description");
const someString = "some description";
const bar = Symbol(someString);
选项
🌐 Options
此规则没有选项。
🌐 This rule has no options.
何时不使用
🌐 When Not To Use It
这个规则不应该在 ES3/5 环境中使用。此外，如果你不想在创建 Symbol 时强制要求 description 的存在，可以安全地关闭此规则。
🌐 This rule should not be used in ES3/5 environments.
In addition, this rule can be safely turned off if you don’t want to enforce presence of description when creating Symbols.
版本
此规则是在 ESLint v3.4.0 中引入。