The Symbol function may have an optional description:

const foo = Symbol("some description");

const someString = "some description";
const bar = Symbol(someString);

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)

It may facilitate identifying symbols when one is observed during debugging.

Rule Details

This rules requires a description when creating symbols.

Examples

Examples of incorrect code for this rule:

::: incorrect

/*eslint symbol-description: "error"*/

const foo = Symbol();

:::

Examples of correct code for this rule:

::: correct

/*eslint symbol-description: "error"*/

const foo = Symbol("some description");

const someString = "some description";
const bar = Symbol(someString);

:::

When Not To Use It

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.