diff --git a/.changeset/swift-falcons-fetch.md b/.changeset/swift-falcons-fetch.md
new file mode 100644
index 000000000000..02ea10991959
--- /dev/null
+++ b/.changeset/swift-falcons-fetch.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: applying :global for +,~ sibling combinator when slots are present
diff --git a/packages/svelte/src/compiler/compile/css/Selector.js b/packages/svelte/src/compiler/compile/css/Selector.js
index 7f26989bcb27..a1c58515d726 100644
--- a/packages/svelte/src/compiler/compile/css/Selector.js
+++ b/packages/svelte/src/compiler/compile/css/Selector.js
@@ -291,14 +291,17 @@ function apply_selector(blocks, node, to_encapsulate) {
}
return false;
} else if (block.combinator.name === '+' || block.combinator.name === '~') {
- const siblings = get_possible_element_siblings(node, block.combinator.name === '+');
+ const [siblings, has_slot_sibling] = get_possible_element_siblings(
+ node,
+ block.combinator.name === '+'
+ );
let has_match = false;
// NOTE: if we have :global(), we couldn't figure out what is selected within `:global` due to the
// css-tree limitation that does not parse the inner selector of :global
// so unless we are sure there will be no sibling to match, we will consider it as matched
const has_global = blocks.some((block) => block.global);
if (has_global) {
- if (siblings.size === 0 && get_element_parent(node) !== null) {
+ if (siblings.size === 0 && get_element_parent(node) !== null && !has_slot_sibling) {
return false;
}
to_encapsulate.push({ node, block });
@@ -542,13 +545,15 @@ function get_element_parent(node) {
* Heading 1
* Heading 2
* @param {import('../nodes/interfaces.js').INode} node
- * @returns {import('../nodes/interfaces.js').INode}
+ * @returns {[import('../nodes/interfaces.js').INode, boolean]}
*/
function find_previous_sibling(node) {
/** @type {import('../nodes/interfaces.js').INode} */
let current_node = node;
+ let has_slot_sibling = false;
do {
if (current_node.type === 'Slot') {
+ has_slot_sibling = true;
const slot_children = current_node.children;
if (slot_children.length > 0) {
current_node = slot_children.slice(-1)[0]; // go to its last child first
@@ -560,13 +565,13 @@ function find_previous_sibling(node) {
}
current_node = current_node.prev;
} while (current_node && current_node.type === 'Slot');
- return current_node;
+ return [current_node, has_slot_sibling];
}
/**
* @param {import('../nodes/interfaces.js').INode} node
* @param {boolean} adjacent_only
- * @returns {Map}
+ * @returns {[Map, boolean]}
*/
function get_possible_element_siblings(node, adjacent_only) {
/** @type {Map} */
@@ -574,7 +579,10 @@ function get_possible_element_siblings(node, adjacent_only) {
/** @type {import('../nodes/interfaces.js').INode} */
let prev = node;
- while ((prev = find_previous_sibling(prev))) {
+ let has_slot_sibling = false;
+ let slot_sibling_found = false;
+ while (([prev, slot_sibling_found] = find_previous_sibling(prev)) && prev) {
+ has_slot_sibling = has_slot_sibling || slot_sibling_found;
if (prev.type === 'Element') {
if (
!prev.attributes.find(
@@ -590,7 +598,7 @@ function get_possible_element_siblings(node, adjacent_only) {
const possible_last_child = get_possible_last_child(prev, adjacent_only);
add_to_map(possible_last_child, result);
if (adjacent_only && has_definite_elements(possible_last_child)) {
- return result;
+ return [result, has_slot_sibling];
}
}
}
@@ -605,7 +613,11 @@ function get_possible_element_siblings(node, adjacent_only) {
parent.type === 'ElseBlock' ||
parent.type === 'AwaitBlock')
) {
- const possible_siblings = get_possible_element_siblings(parent, adjacent_only);
+ const [possible_siblings, slot_sibling_found] = get_possible_element_siblings(
+ parent,
+ adjacent_only
+ );
+ has_slot_sibling = has_slot_sibling || slot_sibling_found;
add_to_map(possible_siblings, result);
if (parent.type === 'EachBlock') {
// first child of each block can select the last child of each block as previous sibling
@@ -623,7 +635,7 @@ function get_possible_element_siblings(node, adjacent_only) {
}
}
}
- return result;
+ return [result, has_slot_sibling];
}
/**
diff --git a/packages/svelte/test/css/samples/siblings-combinator-global-slots/_config.js b/packages/svelte/test/css/samples/siblings-combinator-global-slots/_config.js
new file mode 100644
index 000000000000..6744b032874e
--- /dev/null
+++ b/packages/svelte/test/css/samples/siblings-combinator-global-slots/_config.js
@@ -0,0 +1,25 @@
+export default {
+ warnings: [
+ {
+ code: 'css-unused-selector',
+ message: 'Unused CSS selector ":global(input) ~ p"',
+ pos: 160,
+ start: {
+ character: 160,
+ column: 1,
+ line: 11
+ },
+ end: {
+ character: 178,
+ column: 19,
+ line: 11
+ },
+ frame: ` 9: :global(input) ~ span { color: red; }
+ 10: /* no match */
+ 11: :global(input) ~ p { color: red; }
+ ^
+ 12:
+ `
+ }
+ ]
+};
diff --git a/packages/svelte/test/css/samples/siblings-combinator-global-slots/expected.css b/packages/svelte/test/css/samples/siblings-combinator-global-slots/expected.css
new file mode 100644
index 000000000000..9b583715eda1
--- /dev/null
+++ b/packages/svelte/test/css/samples/siblings-combinator-global-slots/expected.css
@@ -0,0 +1 @@
+input+span.svelte-xyz{color:red}input~span.svelte-xyz{color:red}
\ No newline at end of file
diff --git a/packages/svelte/test/css/samples/siblings-combinator-global-slots/input.svelte b/packages/svelte/test/css/samples/siblings-combinator-global-slots/input.svelte
new file mode 100644
index 000000000000..35edb26e58d4
--- /dev/null
+++ b/packages/svelte/test/css/samples/siblings-combinator-global-slots/input.svelte
@@ -0,0 +1,12 @@
+
+
+ Hello
+
+
+