26 lines
850 B
Markdown
26 lines
850 B
Markdown
---
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title: toSnakeCase
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tags: string,regexp,intermediate
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---
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Converts a string to snake case.
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- Break the string into words and combine them adding `_` as a separator, using a regexp.
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```js
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const toSnakeCase = str =>
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str &&
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str
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.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
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.map(x => x.toLowerCase())
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.join('_');
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```
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```js
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toSnakeCase('camelCase'); // 'camel_case'
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toSnakeCase('some text'); // 'some_text'
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toSnakeCase('some-mixed_string With spaces_underscores-and-hyphens'); // 'some_mixed_string_with_spaces_underscores_and_hyphens'
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toSnakeCase('AllThe-small Things'); // "all_the_small_things"
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toSnakeCase('IAmListeningToFMWhileLoadingDifferentURLOnMyBrowserAndAlsoEditingSomeXMLAndHTML'); // "i_am_listening_to_fm_while_loading_different_url_on_my_browser_and_also_editing_some_xml_and_html"
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```
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