TypeScript - make lower case only for first letter of text

In this short article, we would like to show how to make the lower case for the first text letter using TypeScript - how to decapitalize text.

Quick solution:

// ONLINE-RUNNER:browser;

const decapitalizeTest = (text) => {
    return text && text[0].toLowerCase() + text.slice(1) || text;
};

// Usage examples:

console.log(decapitalizeTest('Abc'));                     // abc
console.log(decapitalizeTest('John said: This is text')); // john said: This is text

Output:

abc
john said: This is text

Naive solution

console.log('Abc'.toLowerCase()); // abc
console.log('John said: this is text'.toLowerCase()); // john said: this is text

Output:

abc
john said: this is text

Note: in above naive solution we believe that toLowerCase() method will solve the problem because text is simple.