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| 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 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 722x 722x 722x 722x 722x 722x 722x 722x 722x 722x 3x 3x 3x 3x 4x 4x 4x 4x 4x 22x 22x 22x 4x 4x 3x 3x 3x 3x 3x 722x | import { render_effect } from '../../../reactivity/effects.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 {Element | Window} target
* @param {Array<string>} events
* @param {() => 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);
}
render_effect(() => {
return () => {
for (var name of events) {
target.removeEventListener(name, handler);
}
};
});
}
let listening_to_form_reset = false;
/**
* 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;
}
if (!listening_to_form_reset) {
listening_to_form_reset = true;
document.addEventListener(
'reset',
(evt) => {
// Needs to happen one tick later or else the dom properties of the form
// elements have not updated to their reset values yet
Promise.resolve().then(() => {
if (!evt.defaultPrevented) {
for (const e of /**@type {HTMLFormElement} */ (evt.target).elements) {
// @ts-expect-error
e.__on_r?.();
}
}
});
},
// In the capture phase to guarantee we get noticed of it (no possiblity of stopPropagation)
{ capture: true }
);
}
}
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