Skip to content

Add support for @source inline and not inline syntax #19

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

Draft
wants to merge 3 commits into
base: main
Choose a base branch
from
Draft

Add support for @source inline and not inline syntax #19

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
c5b4b6a
Initial plan
Copilot Jul 31, 2025
42fdba1
Add support for @source inline and not inline syntax
Copilot Jul 31, 2025
95547d4
Remove incorrect URL support from @source directive
Copilot Jul 31, 2025
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
2 changes: 1 addition & 1 deletion src/tailwind4.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ export const tailwind4 = {
descriptors: defaultSyntax.properties,
},
source: {
prelude: "<string>",
prelude: "<url> | inline( <string># ) | not inline( <string># )",
Copy link
Contributor

@nzakas nzakas Jul 31, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Double-check: Can url() be used with @source? I couldn't find that in the docs.

Copy link
Contributor

@nzakas nzakas Jul 31, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@copilot double-check this please.

Copy link
Contributor Author

Copilot AI Jul 31, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

You're absolutely right - url() is not supported with @source in Tailwind CSS 4. I incorrectly added that syntax. The @source directive is specifically for safelisting utilities and only supports inline() and not inline() functions. I've removed the URL support in commit 95547d4.

},
utility: {
prelude: "<ident>",
Expand Down
94 changes: 94 additions & 0 deletions tests/tailwind4.test.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -216,6 +216,100 @@ describe("Tailwind 4", function () {
]
});
});

it("should parse @source with inline function", () => {
const tree = toPlainObject(parse("@source inline('{hover:,focus:,}underline');"));
assert.deepStrictEqual(tree, {
type: "StyleSheet",
loc: null,
children: [
{
type: "Atrule",
name: "source",
prelude: {
type: "AtrulePrelude",
loc: null,
children: [
{
type: "Function",
name: "inline",
children: [
{
type: "String",
value: "{hover:,focus:,}underline",
loc: null
}
],
loc: null
}
]
},
block: null,
loc: null
}
]
});
});

it("should parse @source with not inline function", () => {
const tree = toPlainObject(parse("@source not inline('container');"));
assert.deepStrictEqual(tree, {
type: "StyleSheet",
loc: null,
children: [
{
type: "Atrule",
name: "source",
prelude: {
type: "AtrulePrelude",
loc: null,
children: [
{
type: "Identifier",
name: "not",
loc: null
},
{
type: "Function",
name: "inline",
children: [
{
type: "String",
value: "container",
loc: null
}
],
loc: null
}
]
},
block: null,
loc: null
}
]
});
});

it("should validate @source with URL syntax", () => {
const tree = parse("@source url('https://example.com/styles.css');");
const atrule = tree.children.toArray()[0];
const validation = lexer.matchAtrulePrelude(atrule.name, atrule.prelude);
assert.strictEqual(validation.error, null);
});

it("should validate @source with inline function", () => {
const tree = parse("@source inline('{hover:,focus:,}underline');");
const atrule = tree.children.toArray()[0];
const validation = lexer.matchAtrulePrelude(atrule.name, atrule.prelude);
assert.strictEqual(validation.error, null);
});

it("should validate @source with not inline function", () => {
const tree = parse("@source not inline('container');");
const atrule = tree.children.toArray()[0];
const validation = lexer.matchAtrulePrelude(atrule.name, atrule.prelude);
assert.strictEqual(validation.error, null);
});
});

describe("@variant", () => {
Expand Down