fix lint

src/compiler/compile/nodes/EventHandler.ts

@@ -35,7 +35,7 @@ function is_valid_any_alias_name(alias: string) {
 	if (alias === '*') {
 		return true;
 	}
-	let idx = alias.indexOf('*');
+	const idx = alias.indexOf('*');
 	if (idx < 0) return false;
 	if (idx !== alias.lastIndexOf('*')) {
 		return false;

src/compiler/compile/nodes/InlineComponent.ts

@@ -98,7 +98,7 @@ export default class InlineComponent extends Node {
 			this.scope = scope;
 		}
 
-		this.handlers.forEach(h => h.validate())
+		this.handlers.forEach(h => h.validate());
 
 		const children = [];
 		for (let i = info.children.length - 1; i >= 0; i--) {

src/compiler/compile/render_dom/Block.ts

@@ -1,10 +1,9 @@
 import Renderer, { BindingGroup } from './Renderer';
 import Wrapper from './wrappers/shared/Wrapper';
 import { b, x } from 'code-red';
-import { Node, Identifier, ArrayPattern } from 'estree';
+import { Node, Identifier, ArrayPattern, Expression } from 'estree';
 import { is_head } from './wrappers/shared/is_head';
 import { regex_double_quotes } from '../../utils/patterns';
-import { Expression } from 'estree';
 
 export interface Bindings {
 	object: Identifier;
@@ -60,7 +59,7 @@ export default class Block {
 		destroy: Array<Node | Node[]>;
 	};
 
-	event_updaters: ({condition:Expression, index:number})[] = [];
+	event_updaters: Array<{condition:Expression, index:number}> = [];
 	event_listeners: Node[] = [];
 
 	maintain_context: boolean;

src/compiler/compile/render_dom/wrappers/Element/EventHandler.ts

@@ -37,7 +37,7 @@ export default class EventHandlerWrapper {
 
 		const snippet = this.get_snippet(block);
 
-		let wrappers = [];
+		const wrappers = [];
 		if (this.node.modifiers.has('trusted')) wrappers.push(x`@trusted`);
 		if (this.node.modifiers.has('self')) wrappers.push(x`@self`);
 		if (this.node.modifiers.has('stopImmediatePropagation')) wrappers.push(x`@stop_immediate_propagation`);

src/runtime/internal/dom.ts

@@ -276,9 +276,7 @@ export function listen(node: EventTarget, event: string, handler: EventListenerO
 export function listen_and_update(get_handler: ()=>EventListenerOrEventListenerObject | null | undefined | false, factory: (handler:EventListenerOrEventListenerObject | null | undefined | false) => Function) {
 	let handler = get_handler();
 	let dispose_handle: Function = factory(handler);
-	const dispose = () => {
+	const dispose = () => dispose_handle();
-		dispose_handle();
-	}
 	// update :
 	dispose.p = () => {
 		const new_handler = get_handler();
@@ -287,7 +285,7 @@ export function listen_and_update(get_handler: ()=>EventListenerOrEventListenerO
 			handler = new_handler;
 			dispose_handle = factory(handler);
 		}
-	}
+	};
 	return dispose;
 }
 

src/runtime/internal/lifecycle.ts

@@ -155,7 +155,7 @@ function start_bubble(type: string, bubble: Bubble, callback: Callback) {
 
 function start_bubbles(comp : SvelteComponent, bubble: Bubble) {
 	for (const type of Object.keys(comp.$$.callbacks)) {
-		comp.$$.callbacks[type].forEach( callback => { start_bubble(type, bubble, callback); })
+		comp.$$.callbacks[type].forEach( callback => start_bubble(type, bubble, callback));
 	}
 }
 
@@ -186,8 +186,8 @@ export function add_callback(comp : SvelteComponent, type: string, f: EventListe
 	const callback: Callback = {f, o};
 	
 	if (o && (o as any)?.once === true) {
-		callback.f = function () {
+		callback.f = function(this: any, ...args) {
-			const r = f.apply(this, arguments);
+			const r = f.call(this, ...args);
 			remove_callback(comp, type, callback);
 			return r;
 		};
@@ -236,9 +236,14 @@ function add_bubble(comp: SvelteComponent, type: string, f: CallbackFactory): Fu
 		for (const dispose of bubble.r.values()) {
 			dispose();
 		}
-	}
+	};
 }
 
+/**
+ * Schedules a callback to run when an handler is added to the component
+ * 
+ * TODO : Docs
+ */
 export function onEventListener(type: string, fn: CallbackFactory) {
 	add_bubble(get_current_component(), type, fn);
 }

src/runtime/internal/types.ts

@@ -25,7 +25,7 @@ export interface Callback {
 	o?: boolean | AddEventListenerOptions | EventListenerOptions;
 }
 
-export type CallbackFactory = (callback: EventListener, options: boolean | AddEventListenerOptions | EventListenerOptions | undefined, type: string) => Function|void;
+export type CallbackFactory = (callback: EventListener, options: boolean | AddEventListenerOptions | EventListenerOptions | undefined, type: string) => Function | undefined;
 
 export interface Bubble {
 	f: CallbackFactory;