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feat: handle CSS infinity keyword #60

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Merged
marklawlor merged 1 commit into from
Aug 6, 2025
Merged

feat: handle CSS infinity keyword #60

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17 changes: 14 additions & 3 deletions src/compiler/declarations.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1157,8 +1157,15 @@ export function parseLength(

if ("unit" in length) {
switch (length.unit) {
case "px":
return length.value;
case "px": {
if (length.value === Infinity) {
return 9999;
} else if (length.value === -Infinity) {
return -9999;
} else {
return length.value;
}
}
case "rem":
if (typeof inlineRem === "number") {
return length.value * inlineRem;
Expand Down Expand Up @@ -2222,7 +2229,11 @@ export function parseDimension(
): StyleDescriptor {
switch (unit) {
case "px":
return value;
if (value === Infinity) {
return 9999;
} else {
return value;
}
case "%":
return `${value}%`;
case "rnh":
Expand Down
252 changes: 132 additions & 120 deletions src/runtime/native/__tests__/calc.test.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -2,167 +2,165 @@ import { render, screen } from "@testing-library/react-native";
import { View } from "react-native-css/components/View";
import { registerCSS, testID } from "react-native-css/jest";

describe("css", () => {
test("calc(10px + 100px)", () => {
registerCSS(
`.my-class {
test("calc(10px + 100px)", () => {
registerCSS(
`.my-class {
width: calc(10px + 100px);
}`,
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 110,
},
testID,
});
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 110,
},
testID,
});
});

test("calc(100% - 30px)", () => {
registerCSS(
`.my-class {
test("calc(100% - 30px)", () => {
registerCSS(
`.my-class {
width: calc(100% - 30px);
}`,
);
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);
render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

// React Native does not support calc() with a percentage value, so there should be no style
expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
testID,
});
// React Native does not support calc() with a percentage value, so there should be no style
expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
testID,
});
});

test("calc(2em * 3)", () => {
registerCSS(
`.my-class {
test("calc(2em * 3)", () => {
registerCSS(
`.my-class {
width: calc(2em * 2);
font-size: 5px
}`,
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 20,
fontSize: 5,
},
testID,
});
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 20,
fontSize: 5,
},
testID,
});
});

test("calc(2rem * 5)", () => {
registerCSS(
`.my-class {
test("calc(2rem * 5)", () => {
registerCSS(
`.my-class {
width: calc(2rem * 5)
}`,
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 140,
},
testID,
});
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 140,
},
testID,
});
});

test("calc(var(--variable) + 20px)", () => {
registerCSS(
`.my-class {
test("calc(var(--variable) + 20px)", () => {
registerCSS(
`.my-class {
--my-var: 100px;
width: calc(var(--my-var) + 20px)
}`,
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 120,
},
testID,
});
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: 120,
},
testID,
});
});

test("calc(var(--percent) + 20%)", () => {
registerCSS(
`.my-class {
test("calc(var(--percent) + 20%)", () => {
registerCSS(
`.my-class {
--percent: 10%;
width: calc(var(--percent) + 20%)
}`,
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: "30%",
},
testID,
});
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {
width: "30%",
},
testID,
});
});

test("calc(var(--variable) + 20%)", () => {
// React Native does not support calc() with a percentage value and a non-percentage unit, so this should be `undefined`
registerCSS(
`.my-class {
test("calc(var(--variable) + 20%)", () => {
// React Native does not support calc() with a percentage value and a non-percentage unit, so this should be `undefined`
registerCSS(
`.my-class {
--variable: 100px;
width: calc(var(--variable) + 20%)
}`,
);
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);
render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {},
testID,
});
expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {},
testID,
});
});

test("calc(var(--percent) + 20px)", () => {
// React Native does not support calc() with a percentage value and a non-percentage unit, so this should be `undefined`
registerCSS(
`.my-class {
test("calc(var(--percent) + 20px)", () => {
// React Native does not support calc() with a percentage value and a non-percentage unit, so this should be `undefined`
registerCSS(
`.my-class {
--percent: 10%;
width: calc(var(--percent) + 20px)
}`,
);
);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);
render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {},
testID,
});
expect(component.type).toBe("View");
expect(component.props).toStrictEqual({
children: undefined,
style: {},
testID,
});
});

Expand Down Expand Up @@ -192,3 +190,17 @@ test("calc & colors", () => {
testID,
});
});

test("infinity", () => {
registerCSS(`.my-class {
border-radius: calc(infinity * 1px);
}`);

render(<View testID={testID} className="my-class" />);
const component = screen.getByTestId(testID);

expect(component.type).toBe("View");
expect(component.props.style).toStrictEqual({
borderRadius: 9999,
});
});