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30-seconds-of-code/snippets/fromCamelCase.md
Angelos Chalaris 5c2eeb3bcc Updated examples
2017-12-27 16:06:16 +02:00

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### fromCamelCase
Converts a string from camelcase.
Use `replace()` to remove underscores, hyphens, and spaces and convert words to camelcase.
Omit the second argument to use a default separator of `_`.
```js
const fromCamelCase = (str, separator = '_') =>
str.replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
.replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2').toLowerCase();
```
```js
fromCamelCase('someDatabaseFieldName', ' ') // 'some database field name'
fromCamelCase('someLabelThatNeedsToBeCamelized', '-') // 'some-label-that-needs-to-be-camelized'
fromCamelCase('someJavascriptProperty', '_') // 'some_javascript_property'
```