getting started with typescript

priv/static/js/dist/index.d.ts

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+/**
+ * Home page ts/js
+ *
+ * @module
+ */
+declare function main(): void;
+declare function on_input_key(evt: KeyboardEvent, ielt: HTMLInputElement, oelt: HTMLTextAreaElement, cb_resize: HTMLInputElement, cb_scroll: HTMLInputElement, max_height: number): Promise<void>;
+declare function auto_resize_output(checkbox_element: HTMLInputElement, target_element: HTMLTextAreaElement, max_height: number): void;
+declare function auto_scroll_to_bottom(checkbox_element: HTMLInputElement, target_element: HTMLTextAreaElement): void;
+type ok_err<t> = {
+    ok: true;
+    result: t;
+} | {
+    ok: false;
+    error: string;
+};
+type wfcin = {
+    wfcin: string;
+};
+type wfcout = ok_err<string>;
+declare function assert(condition: boolean, fail_msg: string): void;
+declare function fetch_wfcin(user_line: string): Promise<wfcout>;