57 lines
987 B
Markdown
57 lines
987 B
Markdown
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# unused-filename [](https://travis-ci.org/sindresorhus/unused-filename)
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> Get an unused filename by appending a number if it exists: `file.txt` → `file (1).txt`
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Useful for safely writing, copying, moving files without overwriting existing files.
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## Install
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```
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$ npm install --save unused-filename
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```
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## Usage
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```
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.
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├── rainbow (1).txt
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├── rainbow.txt
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└── unicorn.txt
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```
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```js
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const unusedFilename = require('unused-filename');
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unusedFilename('rainbow.txt').then(filename => {
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console.log(filename);
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//=> 'rainbow (2).txt'
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});
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```
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## API
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### unusedFilename(filepath)
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Returns a `Promise<string>`.
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### unusedFilename.sync(filepath)
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Returns a `string`.
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#### filepath
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Type: `string`
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## Related
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- [filenamify](https://github.com/sindresorhus/filenamify) - Convert a string to a valid safe filename
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## License
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MIT © [Sindre Sorhus](https://sindresorhus.com)
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