Support return null for wire function

Author: jimmyshiau

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 **2.0.1**
 * Fixed tooltip and popover position
+* Support return null for wire function
 
 **2.0.0**
 * Migrate to null safety

lib/src/affix.dart

@@ -28,7 +28,7 @@ class Affix extends Base {
   /**
    * 
    */
-  static Affix wire(Element element, [Affix create()?]) =>
+  static Affix? wire(Element element, [Affix? create()?]) =>
       p.wire(element, _name, create ?? (() => Affix(element)));
 
   /**

lib/src/alert.dart

@@ -20,7 +20,7 @@ class Alert extends Base {
    * + [create] - If provided, it will be used for Alert creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Alert wire(Element element, [Alert create()?]) =>
+  static Alert? wire(Element element, [Alert? create()?]) =>
       p.wire(element, _name, create ?? (() => Alert(element)));
 
   /** Detach the Alert component from DOM.

lib/src/button.dart

@@ -31,7 +31,7 @@ class Button extends Base {
    * + [create] - If provided, it will be used for Button creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Button wire(Element element, [Button create()?]) =>
+  static Button? wire(Element element, [Button? create()?]) =>
       p.wire(element, _name, create ?? (() => Button(element)));
 
   /** Set the button state, which will change the button text according to [texts]
@@ -87,7 +87,7 @@ class Button extends Base {
       if (e.target is Element) {
         final $btn = $(e.target).closest('.btn');
         if ($btn.isNotEmpty)
-          Button.wire($btn.first).toggle();
+          Button.wire($btn.first)!.toggle();
       }
 
     }, selector: '[data-toggle^=button]');

lib/src/collapse.dart

@@ -32,7 +32,7 @@ class Collapse extends Base {
    * + [create] - If provided, it will be used for Collapse creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Collapse wire(Element element, [Collapse create()?]) =>
+  static Collapse? wire(Element element, [Collapse? create()?]) =>
       p.wire(element, _name, create ?? (() => Collapse(element)));
 
 
@@ -65,7 +65,7 @@ class Collapse extends Base {
             if (active?.transitioning ?? false)
               return;
 
-            Collapse.wire(elem).hide();
+            Collapse.wire(elem)!.hide();
             $(elem).data.set(_name, null);
           }
 

lib/src/dropdown.dart

@@ -23,7 +23,7 @@ class Dropdown extends Base {
    * + [create] - If provided, it will be used for Dropdown creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Dropdown wire(Element element, [Dropdown create()?]) =>
+  static Dropdown? wire(Element element, [Dropdown? create()?]) =>
       p.wire(element, _name, create ?? (() => Dropdown(element)));
 
   /** Toggle the open/close state of the Dropdown.

lib/src/modal.dart

@@ -32,7 +32,7 @@ class Modal extends Base {
    * + [create] - If provided, it will be used for Modal creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Modal wire(Element element, [Modal create()?]) =>
+  static Modal? wire(Element element, [Modal? create()?]) =>
       p.wire(element, _name, create ?? (() => Modal(element)));
 
   /** Toggle the visibility state of the Modal.
@@ -224,7 +224,7 @@ class Modal extends Base {
         return;
 
       // , option = $target.data('modal') ? 'toggle' : $.extend({ remote:!/#/.test(href) && href }, $target.data(), $this.data())
-      Modal.wire($target.first, () => Modal($target.first)).toggle(); // TODO: other options
+      Modal.wire($target.first, () => Modal($target.first))!.toggle(); // TODO: other options
 
       $target.one('hide', (QueryEvent e) => $(elem).trigger('focus'));
 

lib/src/popover.dart

@@ -37,7 +37,7 @@ class Popover extends Tooltip {
    * + [create] - If provided, it will be used for Popover creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Popover wire(Element element, [Popover create()?]) =>
+  static Popover? wire(Element element, [Popover? create()?]) =>
       p.wire(element, _name, create ?? (() => Popover(element)));
 
   @override

lib/src/scrollspy.dart

@@ -34,7 +34,7 @@ class Scrollspy extends Base {
    * Scrollspy object, a new one will be created.
    * 
    */
-  static Scrollspy wire(Element element, [Scrollspy create()?]) =>
+  static Scrollspy? wire(Element element, [Scrollspy? create()?]) =>
       p.wire(element, _name, create ?? (() => Scrollspy(element)));
 
   final ElementQuery _$body;

lib/src/tab.dart

@@ -19,7 +19,7 @@ class Tab extends Base {
    * + [create] - If provided, it will be used for Tab creation. Otherwise 
    * the default constructor with no optional parameter value is used.
    */
-  static Tab wire(Element element, [Tab create()?]) =>
+  static Tab? wire(Element element, [Tab? create()?]) =>
       p.wire(element, _name, create ?? (() => Tab(element)));
 
   /** Show the tab.
@@ -94,7 +94,7 @@ class Tab extends Base {
 
     $document().on('click.tab.data-api', (QueryEvent e) {
       e.preventDefault();
-      wire(e.target as Element).show();
+      wire(e.target as Element)!.show();
 
     }, selector: '[data-toggle="tab"], [data-toggle="pill"]');
   }