How to test legacy version performance during development

help
1

Currently, it seems that legacy JavaScript files only load in older browsers when using modern: false and running meteor run --production . However, the JavaScript files are minified and obfuscated in this mode, making debugging difficult.

Is there a way to build the legacy version with meteor run during normal development, so we can properly test and debug the legacy version behavior?

2

You don’t need to disable modern entirely. You can just disable modern webArchs.

"meteor": {
  "modern": {
    "webArchOnly": false
  }
}

I assume after doing this you should be able to test similarly with meteor run as done with the Meteor bundler. To trigger the legacy builder you should probably use a legacy browser context for it to properly get loaded.