feat: support jsconfig.json (from vscode)

See: https://code.visualstudio.com/docs/languages/jsconfig

src/options.ts

@@ -25,8 +25,8 @@ export const getOptions = async (
   jsxImportSource?: string,
   target?: string,
 }> => {
-  // This call is cached
-  const { data, path } = await joycon.load([tsconfig || 'tsconfig.json'], cwd);
+  // joycon has its builtin-cache support
+  const { data, path } = await joycon.load([tsconfig || 'tsconfig.json', 'jsconfig.json'], cwd);
   if (path && data) {
     const {
       importHelpers,

test/index.ts

@@ -167,6 +167,55 @@ console.log(foo$1);
     const output = await build({}, { input: './fixture/index.tsx', dir });
     output[0].code.should.equal(`var foo = /*#__PURE__*/ h("div", null, "foo");
 
+export { foo };
+`);
+  });
+
+  it('use custom jsxFactory (h) from jsconfig.json', async () => {
+    const dir = realFs(getTestName(), {
+      './fixture/index.tsx': `
+        export const foo = <div>foo</div>
+      `,
+      './fixture/jsconfig.json': `
+        {
+          "compilerOptions": {
+            "jsxFactory": "h"
+          }
+        }
+      `
+    });
+
+    const output = await build({}, { input: './fixture/index.tsx', dir });
+    output[0].code.should.equal(`var foo = /*#__PURE__*/ h("div", null, "foo");
+
+export { foo };
+`);
+  });
+
+  it('use tsconfig.json when tsconfig.json & jsconfig.json both exists', async () => {
+    const dir = realFs(getTestName(), {
+      './fixture/index.tsx': `
+        export const foo = <div>foo</div>
+      `,
+      './fixture/jsconfig.json': `
+        {
+          "compilerOptions": {
+            "jsxFactory": "h"
+          }
+        }
+      `,
+      './fixture/tsconfig.json': `
+        {
+          "compilerOptions": {
+            "jsxFactory": "m"
+          }
+        }
+    `
+    });
+
+    const output = await build({}, { input: './fixture/index.tsx', dir });
+    output[0].code.should.equal(`var foo = /*#__PURE__*/ m("div", null, "foo");
+
 export { foo };
 `);
   });