Skip to content

fix: do not add module declared variables as dependencies #9122

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Sep 20, 2023
Merged

fix: do not add module declared variables as dependencies #9122

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions .changeset/famous-news-perform.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'svelte': patch
---

fix: do not add module declared variables as dependencies
7 changes: 5 additions & 2 deletions packages/svelte/src/compiler/compile/render_dom/wrappers/shared/is_dynamic.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,11 @@ import { is_reserved_keyword } from '../../../utils/reserved_keywords.js';
/** @param {import('../../../../interfaces.js').Var} variable */
export default function is_dynamic(variable) {
if (variable) {
if (variable.mutated || variable.reassigned) return true; // dynamic internal state
if (!variable.module && variable.writable && variable.export_name) return true; // writable props
// Only variables declared in the instance script tags should be considered dynamic
const is_declared_in_reactive_context = !variable.module && !variable.global;

if (is_declared_in_reactive_context && (variable.mutated || variable.reassigned)) return true; // dynamic internal state
if (is_declared_in_reactive_context && variable.writable && variable.export_name) return true; // writable props
if (is_reserved_keyword(variable.name)) return true;
}
return false;
Expand Down
28 changes: 12 additions & 16 deletions packages/svelte/test/js/samples/reactive-class-optimized/expected.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -53,11 +53,11 @@ function create_fragment(ctx) {
div7 = element("div");
t7 = space();
div8 = element("div");
toggle_class(div0, "update1", reactiveModuleVar);
toggle_class(div1, "update2", /*reactiveConst*/ ctx[0].x);
toggle_class(div2, "update3", nonReactiveGlobal && /*reactiveConst*/ ctx[0].x);
toggle_class(div3, "update4", /*$reactiveStoreVal*/ ctx[2]);
toggle_class(div4, "update5", /*$reactiveDeclaration*/ ctx[3]);
toggle_class(div0, "update2", /*reactiveConst*/ ctx[0].x);
toggle_class(div1, "update3", nonReactiveGlobal && /*reactiveConst*/ ctx[0].x);
toggle_class(div2, "update4", /*$reactiveStoreVal*/ ctx[2]);
toggle_class(div3, "update5", /*$reactiveDeclaration*/ ctx[3]);
toggle_class(div4, "update1", reassignedModuleVar);
toggle_class(div5, "static1", nonReactiveModuleVar);
toggle_class(div6, "static2", nonReactiveGlobal);
toggle_class(div7, "static3", nonReactiveModuleVar && nonReactiveGlobal);
Expand All @@ -83,24 +83,20 @@ function create_fragment(ctx) {
insert(target, div8, anchor);
},
p(ctx, [dirty]) {
if (dirty & /*reactiveModuleVar*/ 0) {
toggle_class(div0, "update1", reactiveModuleVar);
}

if (dirty & /*reactiveConst*/ 1) {
toggle_class(div1, "update2", /*reactiveConst*/ ctx[0].x);
toggle_class(div0, "update2", /*reactiveConst*/ ctx[0].x);
}

if (dirty & /*nonReactiveGlobal, reactiveConst*/ 1) {
toggle_class(div2, "update3", nonReactiveGlobal && /*reactiveConst*/ ctx[0].x);
toggle_class(div1, "update3", nonReactiveGlobal && /*reactiveConst*/ ctx[0].x);
}

if (dirty & /*$reactiveStoreVal*/ 4) {
toggle_class(div3, "update4", /*$reactiveStoreVal*/ ctx[2]);
toggle_class(div2, "update4", /*$reactiveStoreVal*/ ctx[2]);
}

if (dirty & /*$reactiveDeclaration*/ 8) {
toggle_class(div4, "update5", /*$reactiveDeclaration*/ ctx[3]);
toggle_class(div3, "update5", /*$reactiveDeclaration*/ ctx[3]);
}
},
i: noop,
Expand Down Expand Up @@ -130,7 +126,7 @@ function create_fragment(ctx) {
}

let nonReactiveModuleVar = Math.random();
let reactiveModuleVar = Math.random();
let reassignedModuleVar = Math.random();

function instance($$self, $$props, $$invalidate) {
let reactiveDeclaration;
Expand All @@ -144,13 +140,13 @@ function instance($$self, $$props, $$invalidate) {
$$self.$$.on_destroy.push(() => $$unsubscribe_reactiveDeclaration());
nonReactiveGlobal = Math.random();
const reactiveConst = { x: Math.random() };
reactiveModuleVar += 1;
reassignedModuleVar += 1;

if (Math.random()) {
reactiveConst.x += 1;
}

$: $$subscribe_reactiveDeclaration($$invalidate(1, reactiveDeclaration = reactiveModuleVar * 2));
$: $$subscribe_reactiveDeclaration($$invalidate(1, reactiveDeclaration = reassignedModuleVar * 2));
return [reactiveConst, reactiveDeclaration, $reactiveStoreVal, $reactiveDeclaration];
}

Expand Down
8 changes: 4 additions & 4 deletions packages/svelte/test/js/samples/reactive-class-optimized/input.svelte
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
<script context="module">
let nonReactiveModuleVar = Math.random();
let reactiveModuleVar = Math.random();
let reassignedModuleVar = Math.random();
</script>

<script>
Expand All @@ -9,22 +9,22 @@
nonReactiveGlobal = Math.random();
const reactiveConst = {x: Math.random()};

$: reactiveDeclaration = reactiveModuleVar * 2;
$: reactiveDeclaration = reassignedModuleVar * 2;

reactiveModuleVar += 1;
reassignedModuleVar += 1;
if (Math.random()) {
reactiveConst.x += 1;
}
</script>

<!--These should all get updaters because they have at least one reactive dependency-->
<div class:update1={reactiveModuleVar}></div>
<div class:update2={reactiveConst.x}></div>
<div class:update3={nonReactiveGlobal && reactiveConst.x}></div>
<div class:update4={$reactiveStoreVal}></div>
<div class:update5={$reactiveDeclaration}></div>

<!--These shouldn't get updates because they're purely non-reactive-->
<div class:update1={reassignedModuleVar}></div>
<div class:static1={nonReactiveModuleVar}></div>
<div class:static2={nonReactiveGlobal}></div>
<div class:static3={nonReactiveModuleVar && nonReactiveGlobal}></div>
Expand Down