68 lines
1.5 KiB
Plaintext
68 lines
1.5 KiB
Plaintext
type ReplaceOptions = {
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all?: boolean;
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};
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/**
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Represents a string with some or all matches replaced by a replacement.
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Use-case:
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- `snake-case-path` to `dotted.path.notation`
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- Changing date/time format: `01-08-2042` → `01/08/2042`
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- Manipulation of type properties, for example, removal of prefixes
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@example
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```
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import {Replace} from 'type-fest';
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declare function replace<
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Input extends string,
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Search extends string,
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Replacement extends string
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>(
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input: Input,
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search: Search,
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replacement: Replacement
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): Replace<Input, Search, Replacement>;
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declare function replaceAll<
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Input extends string,
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Search extends string,
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Replacement extends string
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>(
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input: Input,
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search: Search,
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replacement: Replacement
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): Replace<Input, Search, Replacement, {all: true}>;
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// The return type is the exact string literal, not just `string`.
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replace('hello ?', '?', '🦄');
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//=> 'hello 🦄'
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replace('hello ??', '?', '❓');
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//=> 'hello ❓?'
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replaceAll('10:42:00', ':', '-');
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//=> '10-42-00'
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replaceAll('__userName__', '__', '');
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//=> 'userName'
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replaceAll('My Cool Title', ' ', '');
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//=> 'MyCoolTitle'
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```
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@category String
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@category Template literal
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*/
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export type Replace<
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Input extends string,
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Search extends string,
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Replacement extends string,
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Options extends ReplaceOptions = {},
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> = Input extends `${infer Head}${Search}${infer Tail}`
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? Options['all'] extends true
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? `${Head}${Replacement}${Replace<Tail, Search, Replacement, Options>}`
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: `${Head}${Replacement}${Tail}`
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: Input;
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