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 54 55 56 57 58 59 60 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 304x 304x 304x 304x 304x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 292x 292x 292x 292x 292x 292x 292x 292x 330x 330x 330x 330x 330x 330x 302x 302x 302x 302x 10x 10x 302x 330x 292x 292x 292x 290x 290x 272x 272x 290x 290x 290x 292x 292x 292x | import { STATE_SYMBOL } from '../../../constants.js';
import { destroy_effect, effect, render_effect } from '../../../reactivity/effects.js';
import { untrack } from '../../../runtime.js';
/**
* @param {any} bound_value
* @param {Element} element_or_component
* @returns {boolean}
*/
function is_bound_this(bound_value, element_or_component) {
// Find the original target if the value is proxied.
var proxy_target = bound_value && bound_value[STATE_SYMBOL]?.t;
return bound_value === element_or_component || proxy_target === element_or_component;
}
/**
* @param {Element} element_or_component
* @param {(value: unknown, ...parts: unknown[]) => void} update
* @param {(...parts: unknown[]) => unknown} get_value
* @param {() => unknown[]} [get_parts] Set if the this binding is used inside an each block,
* returns all the parts of the each block context that are used in the expression
* @returns {void}
*/
export function bind_this(element_or_component, update, get_value, get_parts) {
effect(() => {
/** @type {unknown[]} */
var old_parts;
/** @type {unknown[]} */
var parts;
render_effect(() => {
old_parts = parts;
// We only track changes to the parts, not the value itself to avoid unnecessary reruns.
parts = get_parts?.() || [];
untrack(() => {
if (element_or_component !== get_value(...parts)) {
update(element_or_component, ...parts);
// If this is an effect rerun (cause: each block context changes), then nullfiy the binding at
// the previous position if it isn't already taken over by a different effect.
if (old_parts && is_bound_this(get_value(...old_parts), element_or_component)) {
update(null, ...old_parts);
}
}
});
});
return () => {
const e = effect(() => {
if (parts && is_bound_this(get_value(...parts), element_or_component)) {
update(null, ...parts);
}
// Prevent leaking memory by ensuring we tidy up this effect
destroy_effect(e);
});
};
});
}
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