https://github.com/Financial-Times/polyfill-library/releases/tag/v3.108.0

Now includes DOMTokenList and NodeList polyfills from polyfill.io.
These conflict with core-js and require a change in your babel config to prevent issues.

Babel docs on exclude

+ exclude: [
+ 	"web.dom-collections.iterator",
+ 	"web.dom-collections.for-each"
+ ]

These need to be added in all steps/stages where core-js|preset-env might include these polyfills.

example change

• correctly exclude nested dependencies provided by Babel.

This increases build performance.
In most cases bundle size will also go down a bit.

• update polyfill-library v3.107.1
• prevent automatic inclusion of polyfills with // core-web-ignore @mrhenry/core-web/modules/<feature>

Biggest addition from polyfill-library is that all dependencies for Intl features are now accessible from core-web (e.g. time zone data).
Better matchers and dependency configs for Intl features and locales also makes it possible to use almost everything without manually importing things.

• NewExpression matchers
• CallExpression matchers

new Intl.NumberFormat('es', { style: 'currency', currency: 'EUR' }).format(number)

core-web will now detect usage of locale es in the context of NumberFormat and load all needed polyfills.

This is a breaking change because some features were previously matched by Identifier (e.g. forEach) and are now matched by MemberExpression or CallExpression.

although this should result in less false positives we want to be cautious.

polyfill-library v3.105.0

• polyfill-library v3.104.0
• various dependency updates

new polyfills :

• Element.prototype.getAttributeNames
• HTMLSelectElement.prototype.selectedOptions

polyfill-library v3.103.0