snakeCase() function

Converts str to snake case.

Word boundaries are detected from spaces, punctuation, digits, case changes, and acronyms.

Signature:

declare function snakeCase(str: string): string;

Example

snakeCase("foo bar"); // "foo_bar"
snakeCase("fooBar"); // "foo_bar"
snakeCase("foo-bar"); // "foo_bar"
snakeCase("XMLHttpRequest"); // "xml_http_request"

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