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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 77 78 79 80 81 82 83 84 85 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 791x 1704x 1474x 1474x 1474x 1474x 1704x 366x 366x 366x 1x 1x 1x 1x 1x 1x 366x 1474x 1704x 752x 44x 752x 708x 708x 751x 752x 58x 56x 58x 58x 1704x 722x 722x 192x 192x 722x 722x 328x 266x 328x 328x 722x 1473x 1704x 1x 1x 1x 791x 791x 791x 50x 50x 791x | import { IS_ELSEIF } from '../../constants.js';
import { hydrate_nodes, hydrating, set_hydrating } from '../hydration.js';
import { remove } from '../reconciler.js';
import { block, branch, pause_effect, resume_effect } from '../../reactivity/effects.js';
import { HYDRATION_END_ELSE } from '../../../../constants.js';
/**
* @param {Comment} anchor
* @param {() => boolean} get_condition
* @param {(anchor: Node) => import('#client').Dom} consequent_fn
* @param {null | ((anchor: Node) => import('#client').Dom)} [alternate_fn]
* @param {boolean} [elseif] True if this is an `{:else if ...}` block rather than an `{#if ...}`, as that affects which transitions are considered 'local'
* @returns {void}
*/
export function if_block(
anchor,
get_condition,
consequent_fn,
alternate_fn = null,
elseif = false
) {
/** @type {import('#client').Effect | null} */
let consequent_effect = null;
/** @type {import('#client').Effect | null} */
let alternate_effect = null;
/** @type {boolean | null} */
let condition = null;
const effect = block(() => {
if (condition === (condition = !!get_condition())) return;
/** Whether or not there was a hydration mismatch. Needs to be a `let` or else it isn't treeshaken out */
let mismatch = false;
if (hydrating) {
const is_else = anchor.data === HYDRATION_END_ELSE;
if (condition === is_else) {
// Hydration mismatch: remove everything inside the anchor and start fresh.
// This could happen with `{#if browser}...{/if}`, for example
remove(hydrate_nodes);
set_hydrating(false);
mismatch = true;
}
}
if (condition) {
if (consequent_effect) {
resume_effect(consequent_effect);
} else {
consequent_effect = branch(() => consequent_fn(anchor));
}
if (alternate_effect) {
pause_effect(alternate_effect, () => {
alternate_effect = null;
});
}
} else {
if (alternate_effect) {
resume_effect(alternate_effect);
} else if (alternate_fn) {
alternate_effect = branch(() => alternate_fn(anchor));
}
if (consequent_effect) {
pause_effect(consequent_effect, () => {
consequent_effect = null;
});
}
}
if (mismatch) {
// continue in hydration mode
set_hydrating(true);
}
});
if (elseif) {
effect.f |= IS_ELSEIF;
}
}
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