Hooks in Odoo 17

Owl hooks offer a method for code factorization, particularly in situations where it relies on component lifecycle—hooks as a service to hook into a function for accessing particular features. You can create your custom hooks by following the rules provided in Owl documentation. Here we will see some of the built-in hooks provided by the Owl framework.

1.useAutofocus

This hook focuses on an element referenced by a t-ref=” autofocus” in the current component as soon as it appears in the DOM and if it was not displayed before.

It is imported from @web/core/utils/hooks and it returns the element referenced.

2.useBus

2. Adds and clears an event listener to a bus. This hook ensures that the listener is properly cleared when the component is unmounted so that cleanup is performed to avoid unnecessary memory leakage. It is also located in @web/core/utils/hooks

API – useBus(bus, eventName, callback)

3.usePager

This hook effectively configures the environment to display the pager within the control panel of a view. It correctly sets env. config to supply the necessary props for the pager. It is imported from @web/search/pager_hook

4.usePosition

This hook assists in positioning an HTMLElement (the popper) about another HTMLElement (the reference). It ensures that the positioning is dynamically updated when the window is resized or scrolled. It’s imported from @web/core/position_hook.

You should indicate your popper(useRef reference) element using a t-ref directive.

5.useSpellCheck

This hook is adaptable for use on any HTML element with the ‘content-editable’ attribute. Enable the spellcheck state for an input or text area upon focus using a t-ref=’spellcheck’ in the current component. This state is subsequently deactivated on blur, along with the removal of the red outline, contributing to enhanced content readability. If there is a need to completely disable spellcheck on elements that might be affected by the hook, explicitly set the spellcheck attribute to false on the very element.