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chore: better log_effect_tree #17243

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Merged
merged 2 commits into from
Nov 25, 2025
+25 −2
Merged

chore: better log_effect_tree #17243

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chore: better log_effect_tree
Rich-Harris Nov 25, 2025
a85d8f1
untrack
dummdidumm Nov 25, 2025
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27 changes: 25 additions & 2 deletions packages/svelte/src/internal/client/dev/debug.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@ import {
RENDER_EFFECT,
ROOT_EFFECT
} from '#client/constants';
import { snapshot } from '../../shared/clone.js';
import { untrack } from '../runtime.js';

/**
*
Expand Down Expand Up @@ -84,6 +86,16 @@ export function log_effect_tree(effect, depth = 0) {
console.groupEnd();
}

if (effect.nodes_start && effect.nodes_end) {
// eslint-disable-next-line no-console
console.log(effect.nodes_start);

if (effect.nodes_start !== effect.nodes_end) {
// eslint-disable-next-line no-console
console.log(effect.nodes_end);
}
}

let child = effect.first;
while (child !== null) {
log_effect_tree(child, depth + 1);
Expand All @@ -103,7 +115,13 @@ function log_dep(dep) {
const derived = /** @type {Derived} */ (dep);

// eslint-disable-next-line no-console
console.groupCollapsed('%cderived', 'font-weight: normal', derived.v);
console.groupCollapsed(
`%c$derived %c${dep.label ?? '<unknown>'}`,
'font-weight: bold; color: CornflowerBlue',
'font-weight: normal',
untrack(() => snapshot(derived.v))
);

if (derived.deps) {
for (const d of derived.deps) {
log_dep(d);
Expand All @@ -114,6 +132,11 @@ function log_dep(dep) {
console.groupEnd();
} else {
// eslint-disable-next-line no-console
console.log('state', dep.v);
console.log(
`%c$state %c${dep.label ?? '<unknown>'}`,
'font-weight: bold; color: CornflowerBlue',
'font-weight: normal',
untrack(() => snapshot(dep.v))
);
}
}
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