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 可以促进更轻松的调试：当记录一个符号时，使用描述：
¥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.
示例
¥Examples
此规则的错误代码示例：
¥Examples of incorrect code for this rule:
/*eslint symbol-description: "error"*/
const foo = Symbol();
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);
何时不使用
¥When Not To Use It
此规则不应在 ES3/5 环境中使用。此外，如果你不想在创建符号时强制存在 description，则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。