Build contains ES5 incompatible code

[slurmulon]

Problem

vue-meta is producing bundles that contain syntax features that are incompatible with ES5+.:

• https://caniuse.com/mdn-javascript_classes_private_class_fields
• https://caniuse.com/mdn-javascript_operators_optional_chaining
• etc

This causes syntax errors to be reported on (at least) the following browsers, rendering any app using vue-meta unusable:

• Chrome <=78
• Safari <= 14.4 (related: #760)

Ideally the build would contain code that is transpiled/polyfilled to support browsers compatible with ES5+.

Solution

Use @rollup/plugin-babel@^5.x in the build script to transpile the code for all module formats.

Environment

• [email protected]
• [email protected]

[BlackCubeNo99]

Me too.