diff --git a/.changeset/calm-mails-check.md b/.changeset/calm-mails-check.md
new file mode 100644
index 000000000000..7de709c1b0ec
--- /dev/null
+++ b/.changeset/calm-mails-check.md
@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Fixes an issue where functions could not be used as named slots.
diff --git a/packages/astro/src/core/render/index.ts b/packages/astro/src/core/render/index.ts
index 35b5ce76ec8d..db14701b0fde 100644
--- a/packages/astro/src/core/render/index.ts
+++ b/packages/astro/src/core/render/index.ts
@@ -3,7 +3,7 @@ import type { Pipeline } from '../base-pipeline.js';
export { Pipeline } from '../base-pipeline.js';
export { getParams, getProps } from './params-and-props.js';
export { loadRenderer } from './renderer.js';
-export { Slots } from './result.js';
+export { Slots } from './slots.js';
export interface SSROptions {
/** The pipeline instance */
diff --git a/packages/astro/src/core/render/result.ts b/packages/astro/src/core/render/slots.ts
similarity index 90%
rename from packages/astro/src/core/render/result.ts
rename to packages/astro/src/core/render/slots.ts
index e23e87adf7c4..f6d469b2a704 100644
--- a/packages/astro/src/core/render/result.ts
+++ b/packages/astro/src/core/render/slots.ts
@@ -2,13 +2,15 @@ import type { SSRResult } from '../../@types/astro.js';
import { type ComponentSlots, renderSlotToString } from '../../runtime/server/index.js';
import { renderJSX } from '../../runtime/server/jsx.js';
import { chunkToString } from '../../runtime/server/render/index.js';
+import { isRenderInstruction } from '../../runtime/server/render/instruction.js';
import { AstroError, AstroErrorData } from '../errors/index.js';
import type { Logger } from '../logger/core.js';
function getFunctionExpression(slot: any) {
if (!slot) return;
- if (slot.expressions?.length !== 1) return;
- return slot.expressions[0] as (...args: any[]) => any;
+ const expressions = slot?.expressions?.filter((e: unknown) => isRenderInstruction(e) === false);
+ if (expressions?.length !== 1) return
+ return expressions[0] as (...args: any[]) => any;
}
export class Slots {
diff --git a/packages/astro/src/runtime/server/render/astro/render-template.ts b/packages/astro/src/runtime/server/render/astro/render-template.ts
index f12344fe86f6..68df865181fb 100644
--- a/packages/astro/src/runtime/server/render/astro/render-template.ts
+++ b/packages/astro/src/runtime/server/render/astro/render-template.ts
@@ -11,7 +11,7 @@ const renderTemplateResultSym = Symbol.for('astro.renderTemplateResult');
export class RenderTemplateResult {
public [renderTemplateResultSym] = true;
private htmlParts: TemplateStringsArray;
- private expressions: any[];
+ public expressions: any[];
private error: Error | undefined;
constructor(htmlParts: TemplateStringsArray, expressions: unknown[]) {
this.htmlParts = htmlParts;
diff --git a/packages/astro/test/astro-slots.test.js b/packages/astro/test/astro-slots.test.js
index 5653e0421ce3..5078ead05ef7 100644
--- a/packages/astro/test/astro-slots.test.js
+++ b/packages/astro/test/astro-slots.test.js
@@ -170,4 +170,15 @@ describe('Slots', () => {
assert.notEqual(third.children[0].data, first.children[0].data);
}
});
+
+ it("Arguments can be passed to named slots with Astro.slots.render()", async () => {
+ const html = await fixture.readFile('/slotted-named-functions/index.html');
+ const $ = cheerio.load(html);
+ const befor = $("div#before");
+ const [ beforeDiv ] = befor.children("div")
+ assert.deepEqual(beforeDiv.firstChild.data, "Test Content BEFORE")
+ const after = $("div#after");
+ const [ afterDiv ] = after.children("div");
+ assert.deepEqual(afterDiv.firstChild.data, "Test Content AFTER")
+ });
});
diff --git a/packages/astro/test/fixtures/astro-slots/src/components/FunctionsToAPI.astro b/packages/astro/test/fixtures/astro-slots/src/components/FunctionsToAPI.astro
new file mode 100644
index 000000000000..93d50689fab0
--- /dev/null
+++ b/packages/astro/test/fixtures/astro-slots/src/components/FunctionsToAPI.astro
@@ -0,0 +1,12 @@
+---
+const content = 'Test Content';
+const beforeConent = await Astro.slots.render("before", [{content}])
+const afterConent = await Astro.slots.render("after", [{content}])
+---
+
+ {beforeConent}
+
+
+ {afterConent}
+
+
diff --git a/packages/astro/test/fixtures/astro-slots/src/pages/slotted-named-functions.astro b/packages/astro/test/fixtures/astro-slots/src/pages/slotted-named-functions.astro
new file mode 100644
index 000000000000..7885af69468e
--- /dev/null
+++ b/packages/astro/test/fixtures/astro-slots/src/pages/slotted-named-functions.astro
@@ -0,0 +1,11 @@
+---
+import Field from '../components/FunctionsToAPI.astro'
+---
+
+
+ {({content}) =>
{content} BEFORE
}
+
+ {({content}) =>
{content} AFTER
}
+