TypeScript - interface naming convention

This article explains the rules for interface naming convention used in TypeScript.

The interface naming convention defines the following rules:

1. Use PascalCase for interface names.
2. Use camelCase for interface members.
3. Do not use "I" as a prefix for interface names.
4. Use whole words in names when possible.

Example predefined interfaces: Window, Document, etc.

Interface naming convention example

interface Square {

    readonly name: string;

    computePerimeter(aSize: number, bSize: number): number;
    computeArea(aSize: number, bSize: number): number;

    toString(): string;
}

Interface implementation:

class LocalSquare implements Square {

    get name(): string {
        return 'Square';
    }
    
    public computePerimeter(aSize: number, bSize: number): number {
        return 2 * aSize + 2 * bSize;
    }

    public computeArea(aSize: number, bSize: number): number {
        return aSize * bSize;
    }

    public toString(): string {
        return `[ ${this.name} object ]`;
    }
}

Run it online here.

See also

1. Programming - PascalCase definition with example

2. Programming - camelCase definition with example

References

1. TypeScript Handbook Interface - Microsoft Github Docs