react-native-web-internals/dist/esm/StyleSheet/__tests__/dom-test.mjs

React Native for Web

import { createSheet } from "../dom/index.mjs";
describe("createSheet", () => {
  test("creates a sheet on the client", () => {
    const sheet = createSheet();
    expect(sheet.id).toMatchInlineSnapshot('"react-native-stylesheet"'), expect(typeof sheet.getTextContent()).toBe("string"), expect(typeof sheet.insert).toBe("function");
  }), test("supports multiple documents with same styles", () => {
    const sheet = createSheet();
    sheet.insert(".test-sheet { opacity: 1 }", 3);
    const iframe = document.createElement("iframe");
    document.body.appendChild(iframe);
    const iframeDoc = iframe.contentWindow.document,
      iframeRootTag = document.createElement("div");
    iframeDoc.body.appendChild(iframeRootTag);
    const iframeSheet = createSheet(iframeRootTag);
    expect(sheet).not.toBe(iframeSheet), expect(iframeSheet.id).toMatchInlineSnapshot('"react-native-stylesheet"'), expect(typeof iframeSheet.insert).toBe("function"), expect(iframeDoc.getElementById("react-native-stylesheet")).not.toBe(null), expect(iframeSheet.getTextContent().includes("test-sheet")).toBe(!0), sheet.insert(".test-iframe { opacity: 0 }", 3), expect(iframeSheet.getTextContent().includes("test-iframe")).toBe(!0);
    const shadowRoot = document.createElement("div").attachShadow({
        mode: "open"
      }),
      shadowRootTag = document.createElement("div");
    shadowRoot.appendChild(shadowRootTag), document.body.appendChild(shadowRoot);
    const shadowSheet = createSheet(shadowRootTag);
    expect(sheet).not.toBe(shadowSheet), expect(shadowSheet.id).toMatchInlineSnapshot('"react-native-stylesheet"'), expect(typeof shadowSheet.insert).toBe("function"), expect(shadowSheet.getTextContent().includes("test-sheet")).toBe(!0), sheet.insert(".test-shadow { opacity: 0 }", 3), expect(shadowSheet.getTextContent().includes("test-shadow")).toBe(!0);
  });
});
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