Move from Uglifier to Terser #3606
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govuk_publishing_components has govuk-frontend as a dependency. govuk-frontend v5 now targets browsers that support ES6. This means that the UMD modules used in govuk_publsihing_components from govuk-frontend use features of ES6 and so it means that Uglifier can't be used anymore because it only supports ES5.
andysellick
approved these changes
May 7, 2024
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What
Use Terser instead of Uglifier to compile JavaScript.
Why
This change is preparation for upgrading to V5 of govuk-frontend in the govuk-publishing-components gem.
govuk-frontend v5 now targets browsers that support ES6. This means that the UMD modules used in govuk_publsihing_components from govuk-frontend use features of ES6 and so it means that Uglifier can't be used anymore because it only supports ES5.
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Further info
JS Size
Browser testing
I've tested the changes on Integration using the browsers below, functionality works as expected without any console errors.