However, because the polyfills create or extend global objects, you might have other code in your service unintentionally relying on the inclusion of these polyfills. You might need to introduce your own polyfills or rewrite your JavaScript to avoid using the polyfilled features.

This change was introduced in pull request #612: Update packages, configs + Node.js 20.

Check for minor visual changes in the rendering of the component

We've made some style adjustments to the stylesheet shipped with the component to make its colours, height, line-height and padding match those of the latest version of GOV.UK Frontend's <input>.

If you're using this stylesheet:

check if our style update affects the rendering of the component in your service, and adjust if necessary
if you were adding to the default style's to match GOV.UK Frontend's input, look for CSS declarations you may now be able to remove

This change was introduced in pull request #644: Align CSS styles with GOV.UK Frontend.

New features

Options to add classes to parts of the component

Use these new options to add your own classes to parts of the component:

inputClasses for the input element
hintClasses for the suggestion hint (input element appearing when the text typed by the user matches the start of an option)
menuClasses for the ul element listing the options

You can also add custom classes to the ul listing the options through the new menuAttributes option, providing a className or class property.

This change was introduced in:

pull request #602: Add inputClasses option. Thanks to @andreyyudin for contributing this change.
pull request #649: Update options for styling component inputs
pull request #650: Update ways of configuring menu attributes

New class on the component's status

Use the new autocomplete__status class in your CSS (or <CSS_NAMESPACE>__status if you set the cssNamespace option) to customise the styles of the component's status element (hidden element that makes announcements to assistive technologies).

This change was introduced in pull request #620: Add className attribute to status component. Thanks to @lennym for contributing this change.