84 lines
2.2 KiB
Markdown
84 lines
2.2 KiB
Markdown
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# import/no-anonymous-default-export
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<!-- end auto-generated rule header -->
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Reports if a module's default export is unnamed. This includes several types of unnamed data types; literals, object expressions, arrays, anonymous functions, arrow functions, and anonymous class declarations.
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Ensuring that default exports are named helps improve the grepability of the codebase by encouraging the re-use of the same identifier for the module's default export at its declaration site and at its import sites.
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## Options
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By default, all types of anonymous default exports are forbidden, but any types can be selectively allowed by toggling them on in the options.
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The complete default configuration looks like this.
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```js
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"import/no-anonymous-default-export": ["error", {
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"allowArray": false,
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"allowArrowFunction": false,
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"allowAnonymousClass": false,
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"allowAnonymousFunction": false,
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"allowCallExpression": true, // The true value here is for backward compatibility
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"allowNew": false,
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"allowLiteral": false,
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"allowObject": false
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}]
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```
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## Rule Details
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### Fail
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```js
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export default []
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export default () => {}
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export default class {}
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export default function () {}
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/* eslint import/no-anonymous-default-export: [2, {"allowCallExpression": false}] */
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export default foo(bar)
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export default 123
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export default {}
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export default new Foo()
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```
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### Pass
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```js
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const foo = 123
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export default foo
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export default class MyClass() {}
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export default function foo() {}
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/* eslint import/no-anonymous-default-export: [2, {"allowArray": true}] */
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export default []
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/* eslint import/no-anonymous-default-export: [2, {"allowArrowFunction": true}] */
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export default () => {}
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/* eslint import/no-anonymous-default-export: [2, {"allowAnonymousClass": true}] */
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export default class {}
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/* eslint import/no-anonymous-default-export: [2, {"allowAnonymousFunction": true}] */
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export default function () {}
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export default foo(bar)
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/* eslint import/no-anonymous-default-export: [2, {"allowLiteral": true}] */
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export default 123
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/* eslint import/no-anonymous-default-export: [2, {"allowObject": true}] */
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export default {}
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/* eslint import/no-anonymous-default-export: [2, {"allowNew": true}] */
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export default new Foo()
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```
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