capitalize

The capitalize() method returns a new string with the first letter uppercased.

Interactive example

Syntax

function capitalize<
	GenericInput extends string
>(
	input: GenericInput
): Capitalize<GenericInput>

Parameters

• input: The string to modify. The type is generic (GenericInput extends string) to allow precise literal type inference.

Return value

A new string with the first letter uppercased. The return type is precisely inferred thanks to TypeScript's Capitalize<GenericInput> utility type.

See also

• uncapitalize - Lowercases the first letter
• toUpperCase - Converts the whole string to uppercase
• toLowerCase - Converts the whole string to lowercase

Sources

• TypeScript - Capitalize<StringType> - TypeScript utility type for inference