[REF] web: Update generic files

General cleaning of some helpers and generic files. The idea is that they are
less likely to be entirely re-written in the near future so this is a way to
keep the code clean, readable and compliant to the current standards. Changes include:
- Use of async/await when possible
- Use of const/let instead of var
- Removal of underscore.js
- Use of native JS instead of jQuery when possible

The logic of the affected code remains the same.

3 files changed, 10 insertions, 9 deletions

diff --git a/addons/web/static/src/js/chrome/action_mixin.js b/addons/web/static/src/js/chrome/action_mixin.js
index 1ca87c15ef3..a704e5736a0 100644
--- a/addons/web/static/src/js/chrome/action_mixin.js
+++ b/addons/web/static/src/js/chrome/action_mixin.js
@@ -20,9 +20,9 @@ odoo.define('web.ActionMixin', function (require) {
      * @module web.ActionMixin
      */
 
-    var core = require('web.core');
+    const core = require('web.core');
 
-    var ActionMixin = {
+    const ActionMixin = {
         template: 'Action',
 
         /**
@@ -79,7 +79,7 @@ odoo.define('web.ActionMixin', function (require) {
         renderElement: function () {
             this._super.apply(this, arguments);
             if (this.contentTemplate) {
-                var content = core.qweb.render(this.contentTemplate, { widget: this });
+                const content = core.qweb.render(this.contentTemplate, { widget: this });
                 this.$('.o_content').append(content);
             }
         },
@@ -223,7 +223,7 @@ odoo.define('web.ActionMixin', function (require) {
          */
         _onGetControllerQueryParams: function (ev) {
             ev.stopPropagation();
-            var state = this.getOwnedQueryParams();
+            const state = this.getOwnedQueryParams();
             ev.data.callback(state || {});
         },
     };
diff --git a/addons/web/static/src/js/core/custom_hooks.js b/addons/web/static/src/js/core/custom_hooks.js
index c196dd7f900..69750066a8c 100644
--- a/addons/web/static/src/js/core/custom_hooks.js
+++ b/addons/web/static/src/js/core/custom_hooks.js
@@ -14,18 +14,18 @@ odoo.define('web.custom_hooks', function () {
      */
     function useFocusOnUpdate() {
         const component = Component.current;
-        component.__willFocus = null;
+        let willFocus = null;
 
         function _focusSelector() {
-            if (component.__willFocus) {
-                const target = component.el.querySelector(component.__willFocus);
+            if (willFocus) {
+                const target = component.el.querySelector(willFocus);
                 if (target) {
                     target.focus();
                     if (['INPUT', 'TEXTAREA'].includes(target.tagName)) {
                         target.selectionStart = target.selectionEnd = target.value.length;
                     }
                 }
-                component.__willFocus = null;
+                willFocus = null;
             }
         }
 
@@ -33,7 +33,7 @@ odoo.define('web.custom_hooks', function () {
         onPatched(_focusSelector);
 
         return function focusOnUpdate(selector = '[autofocus]') {
-            component.__willFocus = selector;
+            willFocus = selector;
         };
     }
 
diff --git a/addons/web/static/src/js/main.js b/addons/web/static/src/js/main.js
index 35f00254ba8..49b90228ba2 100644
--- a/addons/web/static/src/js/main.js
+++ b/addons/web/static/src/js/main.js
@@ -1,4 +1,5 @@
 odoo.define('web.web_client', function (require) {
+    "use strict";
 
     const env = require('web.env');
     const session = require("web.session");