Quasar VUE_PROD_HYDRATION_MISMATCH_DETAILS is not defined – Javascript

The Problem:

While using Quasar with Vite, you encountered a warning message in the console: VUE_PROD_HYDRATION_MISMATCH_DETAILS is not explicitly defined. This warning appears because you’re using the esm-bundler build of Vue, which requires specific compile-time feature flags to be globally injected through the bundler configuration for optimized tree-shaking in the production bundle. The issue is that you’re unsure where to define these flags within the Quasar Framework.

The Solutions:

Solution 1: Set the flag yourself

When upgrading to Vue 3.4, this warning starts appearing because the required dependencies, namely `@vitejs/plugin-vue`, are not upgraded to ^5.0.0. This issue is documented in the Vue.js blog under [Potential Actions Needed](https://blog.vuejs.org/posts/vue-3-4#potential-actions-needed) for upgrading to Vue 3.4.

Since Quasar doesn’t allow directly upgrading this package, as it’s not a top-level dependency of Quasar projects, you can set the flag yourself.

quasar.config.js

build: {
  extendViteConf(viteConf) {
    viteConf.define.__VUE_PROD_HYDRATION_MISMATCH_DETAILS__ = false
  },
}

Video Explanation:

The following video, titled "Quasar VUE_PROD_HYDRATION_MISMATCH_DETAILS is not ...", provides additional insights and in-depth exploration related to the topics discussed in this post.

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