js: Convert static/js/zform.js to ES6 module.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

.eslintrc.json

@@ -306,7 +306,6 @@
                 "vdom": false,
                 "widgetize": false,
                 "zcommand": false,
-                "zform": false,
                 "zxcvbn": false
             }
         },

frontend_tests/node_tests/widgetize.js

@@ -8,7 +8,6 @@ const {make_zjquery} = require("../zjsunit/zjquery");
 
 set_global("$", make_zjquery());
 const poll_widget = set_global("poll_widget", {});
-set_global("zform", {});
 set_global("document", "document-stub");
 
 const return_true = () => true;

static/js/bundles/app.js

@@ -43,7 +43,6 @@ import "../top_left_corner";
 import "../stream_list";
 import "../filter";
 import "../poll_widget";
-import "../zform";
 import "../widgetize";
 import "../submessage";
 import "../fetch_status";

static/js/global.d.ts

@@ -169,4 +169,3 @@ declare let user_status: any;
 declare let user_status_ui: any;
 declare let widgetize: any;
 declare let zcommand: any;
-declare let zform: any;

static/js/widgetize.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const todo_widget = require("./todo_widget");
+const zform = require("./zform");
 
 const widgets = new Map([
     ["poll", poll_widget],

static/js/zform.js

@@ -1,10 +1,8 @@
-"use strict";
+import render_widgets_zform_choices from "../templates/widgets/zform_choices.hbs";
 
-const render_widgets_zform_choices = require("../templates/widgets/zform_choices.hbs");
+import * as schema from "./schema";
 
-const schema = require("./schema");
-
-exports.validate_extra_data = function (data) {
+export function validate_extra_data(data) {
     function check(data) {
         function check_choice_data(data) {
             function check_choice_item(field_name, val) {
@@ -40,15 +38,15 @@ exports.validate_extra_data = function (data) {
     }
 
     return true;
-};
+}
 
-exports.activate = function (opts) {
+export function activate(opts) {
     const self = {};
 
     const outer_elem = opts.elem;
     const data = opts.extra_data;
 
-    if (!exports.validate_extra_data(data)) {
+    if (!validate_extra_data(data)) {
         // callee will log reason we fail
         return undefined;
     }
@@ -102,6 +100,4 @@ exports.activate = function (opts) {
     render();
 
     return self;
-};
-
-window.zform = exports;
+}