Allow to export only a single function/class from a file

[michalstocki]

Invalid code examples 👎

export function doA() {
}

export function doB() {
}

export function doA() {
}

export const doB = () => {
};

export function doA() {
}

export class ClassA  {
  doB() {
    doA();
  }
};

Valid code examples 👍

export function doA() {
}

function doB() {
}

export function doA() {
}

const doB = () => {
};

export class ClassA  {
  doB() {
    doA();
  }
};

function doA() {
}

But allow multiple interfaces or consts:

export interface MyStructure {
  param1:OtherStructure;
}

export interface OtherStructure {
  param2:MyOtherStructure;
  param3:string;
}

export const MOUSE_EVENT_TYPES:string[] = ['click','mouseup','mousedown'];
export const TOUCH_EVENT_TYPES:string[] = ['touchstart', 'touchend', 'touchcancel'];
export const EVENT_NAMES:string[] = [...MOUSE_EVENT_TYPES, ...TOUCH_EVENT_TYPES];