1 line of code: How to lower case a string

const toLowerCase = str => str.split(" ").map((m) => ${m.charAt(0).toLowerCase()}${m.slice(1)}`).join(" ");

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Returns a new string in lower case. Uses spaces as delimiter.

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The repository & npm package

You can find the all the utility functions from this series at github.com/martinkr/onelinecode
The library is also published to npm as @onelinecode for your convenience.

The code and the npm package will be updated every time I publish a new article.

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Comments

[kao]

Sorry, I think I am confused. why not call the toLowerCase() function? str.toLowerCase()?