Decapitalizes the first letter of a string.
Use array destructuring and String.toLowerCase()
to decapitalize first letter, ...rest
to get array of characters after first letter and then Array.prototype.join('')
to make it a string again.
Omit the upperRest
parameter to keep the rest of the string intact, or set it to true
to convert to uppercase.
代码片段
const decapitalize = ([first, ...rest], upperRest = false) =>
first.toLowerCase() + (upperRest ? rest.join('').toUpperCase() : rest.join(''));
使用样例
decapitalize('FooBar'); // 'fooBar'
decapitalize('FooBar', true); // 'fOOBAR'