Invalid "exports" paths in zrender v6 cause Metro warnings in React Native 0.79

[CezarCobuz]

When using echarts@^6.0.0 (which depends on zrender@^6) inside a React Native project ([email protected]), Metro shows repeated warnings about invalid package.json configuration in zrender.

Example warnings:

 WARN  The package .../node_modules/zrender contains an invalid package.json configuration.
Reason: The resolution for ".../node_modules/zrender/lib/core/platform" defined in "exports"
is .../node_modules/zrender/lib/core/platform, however this file does not exist.
Falling back to file-based resolution.
...

This happens for several subpaths such as:

• lib/core/platform
• lib/zrender
• lib/svg/helper
• lib/graphic/Path
• lib/graphic/Image
• lib/graphic/TSpan
• lib/canvas/dashStyle
• lib/svg/mapStyleToAttrs

Metro (the React Native bundler) now validates the "exports" field by default and warns when subpaths point to non-existent files. It then falls back to file-based resolution so the app still works, but the warnings are noisy and could break if Metro ever removes the fallback.

Steps to reproduce

1. Create a RN 0.79 project.
2. Install @wuba/react-native-echarts@^2.0.3 and echarts@^6.0.0.
3. Run react-native start.
4. Observe Metro warnings about invalid exports in zrender.

Expected "exports" paths in zrender should match actual published files, so Metro (and other bundlers) resolve cleanly without warnings.

Environment

React Native: 0.79.4 echarts: 6.0.0 zrender: 6.x (installed via echarts) @wuba/react-native-echarts: 2.0.3

[davidtjones02]

Had a bit of time to look into this. Not 100% sure if this causes actual breakage, but worth mentioning. happy to open a PR if this wasn't intentional.

In #1056 the package.json changed the wildcard export from "./*": "./*.js" to "./*": "./*"

from what I can tlell, and someone can say otherwise if not. since metro now validates package.json exports by default, it complains because the export paths dont map to real files (e.g. lib/graphic/Path doesn't exist without .js). Metro falls back to file resolution so things still run, but it spams the console as a result

simplest fix is to patch-package / pnpm patch (what we've done)

diff --git a/package.json b/package.json
index 26e4c59d0f7d26a49c9129c78aa6469228fce64a..4d563847cb6637e5f420cd474ff26cbef5d5cd0b 100644
--- a/package.json
+++ b/package.json
@@ -84,6 +84,6 @@
     "./lib/tool/color": "./lib/tool/color.js",
     "./lib/graphic/LinearGradient": "./lib/graphic/LinearGradient.js",
     "./lib/graphic/RadialGradient": "./lib/graphic/RadialGradient.js",
-    "./*": "./*"
+    "./*": "./*.js"
   }
 }

Alternatively, I assume you could turn off unstable_enablePackageExports in your metro.config.js to hide the warnings, but this isn't something I have tested.