All files / src/internal/client/dom/elements/bindings shared.js

96.36% Statements 53/55
100% Branches 7/7
66.66% Functions 2/3
96.22% Lines 51/53

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 542x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 14x 14x 14x 14x 14x 20x 20x 14x 14x 14x 20x 20x 14x 14x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 677x 677x 677x 677x 295x 295x 295x     295x 677x 382x 382x 382x 677x 677x 677x  
import { teardown } from '../../../reactivity/effects.js';
import { add_form_reset_listener } from '../misc.js';
 
/**
 * Fires the handler once immediately (unless corresponding arg is set to `false`),
 * then listens to the given events until the render effect context is destroyed
 * @param {EventTarget} target
 * @param {Array<string>} events
 * @param {(event?: Event) => void} handler
 * @param {any} call_handler_immediately
 */
export function listen(target, events, handler, call_handler_immediately = true) {
	if (call_handler_immediately) {
		handler();
	}
 
	for (var name of events) {
		target.addEventListener(name, handler);
	}
 
	teardown(() => {
		for (var name of events) {
			target.removeEventListener(name, handler);
		}
	});
}
 
/**
 * Listen to the given event, and then instantiate a global form reset listener if not already done,
 * to notify all bindings when the form is reset
 * @param {HTMLElement} element
 * @param {string} event
 * @param {() => void} handler
 * @param {() => void} [on_reset]
 */
export function listen_to_event_and_reset_event(element, event, handler, on_reset = handler) {
	element.addEventListener(event, handler);
	// @ts-expect-error
	const prev = element.__on_r;
	if (prev) {
		// special case for checkbox that can have multiple binds (group & checked)
		// @ts-expect-error
		element.__on_r = () => {
			prev();
			on_reset();
		};
	} else {
		// @ts-expect-error
		element.__on_r = on_reset;
	}
 
	add_form_reset_listener();
}