1 files changed, 25 insertions, 0 deletions
diff --git a/src/content/presenters/FocusPresenter.ts b/src/content/presenters/FocusPresenter.ts
new file mode 100644
index 0000000..4cef5bf
--- /dev/null
+++ b/src/content/presenters/FocusPresenter.ts
@@ -0,0 +1,25 @@
+import * as doms from '../../shared/utils/dom';
+
+export default interface FocusPresenter {
+  focusFirstElement(): boolean;
+
+  // eslint-disable-next-line semi
+}
+
+export class FocusPresenterImpl implements FocusPresenter {
+  focusFirstElement(): boolean {
+    let inputTypes = ['email', 'number', 'search', 'tel', 'text', 'url'];
+    let inputSelector = inputTypes.map(type => `input[type=${type}]`).join(',');
+    let targets = window.document.querySelectorAll(inputSelector + ',textarea');
+    let target = Array.from(targets).find(doms.isVisible);
+    if (target instanceof HTMLInputElement) {
+      target.focus();
+      return true;
+    } else if (target instanceof HTMLTextAreaElement) {
+      target.focus();
+      return true;
+    }
+    return false;
+  }
+}
+