Add no-action-on-submit-button rule documentation

README.md

@@ -217,6 +217,7 @@ Each rule has emojis denoting:
 | [no-accesskey-attribute](./docs/rule/no-accesskey-attribute.md)                                           | ✅  |     | ⌨️  | 🔧  |
 | [no-action](./docs/rule/no-action.md)                                                                     | ✅  |     |     |     |
 | [no-action-modifiers](./docs/rule/no-action-modifiers.md)                                                 |     |     |     |     |
+| [no-action-on-submit-button](./docs/rule/no-action-on-submit-button.md)                                   |     |     |     |     |
 | [no-args-paths](./docs/rule/no-args-paths.md)                                                             | ✅  |     |     |     |
 | [no-arguments-for-html-elements](./docs/rule/no-arguments-for-html-elements.md)                           | ✅  |     |     |     |
 | [no-aria-hidden-body](./docs/rule/no-aria-hidden-body.md)                                                 | ✅  |     | ⌨️  | 🔧  |

docs/rule/no-action-on-submit-button.md

@@ -0,0 +1,35 @@
+# no-action-on-submit-button
+
+This rule requires all `<button>` elements with a `type="submit"` attribute to not have any action.
+
+When the `type` attribute of `<button>` elements is `submit`, the action should be on the `<form>` element instead of directly on the button.
+
+By default, the `type` attribute of `<button>` elements is `submit`.
+
+## Examples
+
+This rule **forbids** the following:
+
+```hbs
+<button type="submit" {{on "click" "handleClick"}} />
+<button type="submit" {{action "handleClick"}} />
+<button {{on "click" "handleClick"}} />
+<button {{action "handleClick"}} />
+```
+
+This rule **allows** the following:
+
+```hbs
+<button type="button" {{on "click" "handleClick"}} />
+<button type="button" {{action "handleClick"}} />
+<button type="submit" />
+<button />
+```
+
+## Related Rules
+
+- [require-button-type](require-button-type.md)
+
+## References
+
+- Red [HTML spec - the button element](https://html.spec.whatwg.org/multipage/form-elements.html#attr-button-type)