1 line of code: How to capitalise a string

  const capitalise = ${str.charAt(0).toUpperCase()}${str.slice(1)}`;

Returns a new capitalised string.

Optimised version (Benchmark)

const capitalise = str => `${str[0].toUpperCase()}${str.slice(1)}`;

---

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.

---

Follow me on Twitter: @martinkr and consider to buy me a coffee

Photo by zoo_monkey on Unsplash

---

---

Comments

[James Thomson]

Slightly more succinct version

const capitalise = (str) => `${str[0].toUpperCase()}${str.slice(1)}`;

[Martin Krause]

Hi James,

thank you for your contribution, as your code is just a little bit faster according to perf.link, I updated the article and the code.

Cheers!