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 2x 300x 300x 300x 300x 300x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 297x 297x 297x 297x 297x 297x 297x 297x 335x 335x 335x 335x 335x 335x 307x 307x 307x 307x 10x 10x 307x 335x 297x 297x 297x 286x 286x 286x 262x 262x 286x 297x 297x 297x | import { STATE_SYMBOL } from '../../../constants.js';
import { effect, render_effect } from '../../../reactivity/effects.js';
import { untrack } from '../../../runtime.js';
import { queue_micro_task } from '../../task.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 () => {
// We cannot use effects in the teardown phase, we we use a microtask instead.
queue_micro_task(() => {
if (parts && is_bound_this(get_value(...parts), element_or_component)) {
update(null, ...parts);
}
});
};
});
}
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