Remove default legacy rejection handling

Enable SSR
Fixes #54
Fixes #53

index.d.ts

@@ -21,6 +21,20 @@ export function fileOpen<M extends boolean | undefined = false>(options?: {
    * reference to the `reject` callback for the `Promise` returned by
    * `fileOpen`, so that developers may reject the `Promise` when desired at
    * that time.
+   * Example rejector:
+   *
+   * const file = await fileOpen({
+   *   setupLegacyCleanupAndRejection: (rejectionHandler) => {
+   *     const timeoutId = setTimeout(rejectionHandler, 10_000);
+   *     return (reject) => {
+   *       clearTimeout(timeoutId);
+   *       if (reject) {
+   *         reject('My error message here.');
+   *       }
+   *     };
+   *   },
+   * });
+   *
    * ToDo: Remove this workaround once
    *   https://github.com/whatwg/html/issues/6376 is specified and supported.
    */

package.json

@@ -1,6 +1,6 @@
 {
   "name": "browser-fs-access",
-  "version": "0.17.3",
+  "version": "0.18.0",
   "description": "File System Access API with legacy fallback in the browser.",
   "browser": "./dist/index.js",
   "main": "./dist/index.js",
@@ -39,13 +39,13 @@
   },
   "homepage": "https://github.com/GoogleChromeLabs/browser-fs-access#readme",
   "devDependencies": {
-    "eslint": "^7.28.0",
+    "eslint": "^7.29.0",
     "eslint-config-google": "^0.14.0",
     "eslint-config-prettier": "^8.3.0",
     "http-server": "^0.12.3",
-    "prettier": "^2.3.1",
+    "prettier": "^2.3.2",
     "shx": "^0.3.3",
-    "terser": "^5.7.0"
+    "terser": "^5.7.1"
   },
   "eslintConfig": {
     "parserOptions": {

src/legacy/directory-open.mjs

@@ -34,24 +34,9 @@ export default async (options = {}) => {
     if (options.setupLegacyCleanupAndRejection) {
       cleanupListenersAndMaybeReject =
         options.setupLegacyCleanupAndRejection(rejectionHandler);
-    } else {
-      // Default rejection behavior; works in most cases, but not in Chrome in non-secure contexts.
-      cleanupListenersAndMaybeReject = (reject) => {
-        window.removeEventListener('pointermove', rejectionHandler);
-        window.removeEventListener('pointerdown', rejectionHandler);
-        window.removeEventListener('keydown', rejectionHandler);
-        if (reject) {
-          reject(new DOMException('The user aborted a request.', 'AbortError'));
-        }
-      };
-
-      window.addEventListener('pointermove', rejectionHandler);
-      window.addEventListener('pointerdown', rejectionHandler);
-      window.addEventListener('keydown', rejectionHandler);
     }
-
     input.addEventListener('change', () => {
-      cleanupListenersAndMaybeReject();
+      cleanupListenersAndMaybeReject?.();
       let files = Array.from(input.files);
       if (!options.recursive) {
         files = files.filter((file) => {

src/legacy/file-open.mjs

@@ -30,32 +30,16 @@ export default async (options = {}) => {
     input.multiple = options.multiple || false;
     // Empty string allows everything.
     input.accept = accept || '';
-
     // ToDo: Remove this workaround once
     // https://github.com/whatwg/html/issues/6376 is specified and supported.
     let cleanupListenersAndMaybeReject;
     const rejectionHandler = () => cleanupListenersAndMaybeReject(reject);
     if (options.setupLegacyCleanupAndRejection) {
       cleanupListenersAndMaybeReject =
         options.setupLegacyCleanupAndRejection(rejectionHandler);
-    } else {
-      // Default rejection behavior; works in most cases, but not in Chrome in non-secure contexts.
-      cleanupListenersAndMaybeReject = (reject) => {
-        window.removeEventListener('pointermove', rejectionHandler);
-        window.removeEventListener('pointerdown', rejectionHandler);
-        window.removeEventListener('keydown', rejectionHandler);
-        if (reject) {
-          reject(new DOMException('The user aborted a request.', 'AbortError'));
-        }
-      };
-
-      window.addEventListener('pointermove', rejectionHandler);
-      window.addEventListener('pointerdown', rejectionHandler);
-      window.addEventListener('keydown', rejectionHandler);
     }
-
     input.addEventListener('change', () => {
-      cleanupListenersAndMaybeReject();
+      cleanupListenersAndMaybeReject?.();
       resolve(input.multiple ? Array.from(input.files) : input.files[0]);
     });
 

src/supported.mjs

@@ -21,6 +21,10 @@
  * @returns {boolean} Returns `true` if the File System Access API is supported and usable, else returns `false`.
  */
 const supported = (() => {
+  // When running in an SSR environment return `false`.
+  if (typeof self === 'undefined') {
+    return false;
+  }
   // ToDo: Remove this check once Permissions Policy integration
   // has happened, tracked in
   // https://github.com/WICG/file-system-access/issues/245.