`alias` doesn't seem to do anything at all

[RichardJECooke]

🐛 bug report

Summary: parcel does not seem to be using the alias field in package.json to point to the correct version of vue, nor give any errors if the field is nonsense.

runtime command: node ./node_modules/.bin/parcel src/index.html

package.json:

  "alias": {
    "vue" : "../node_modules/vue/dist/vue.common.js"
  },

app.js:

import { BootstrapVue, IconsPlugin } from 'bootstrap-vue'
import Vue from 'vue'

Expected:

• parcel will use the vue at node_modules/vue/dist/vue.common.js

Actual:

• parcel (or app.js) instead uses the default vue, which is vue.runtime.common.js. I know this because the website tells me You are using the runtime-only build of Vue where the template compiler is not available.

Tests:

• I can change package.json setting foraliasto"vue" : "NONSENSE/wrong"` and the parcel bundler doesn't even complain - indicating it's not being used at all.

🎛 Configuration (.babelrc, package.json, cli command)

package.json:

{
  "name": "celi",
  "version": "0.1.0",
  "dependencies": {
    "bootstrap-vue": "^2.11.0",
    "vue": "^2.6.11"
  },
  "devDependencies": {
    "http-server": "^0.12.1",
    "parcel-bundler": "^1.12.4",
    "@vue/cli": "^4.3.1"
  },
  "alias": {
    "vue" : "../node_modules/vue/dist/vue.common.js"
  },
}

🔦 Context

If I try to set the vue path manually in my app.js file, like: import Vue from '../../node_modules/vue/dist/vue.common' then the website warns me it is using multiple instances of vue. So I'm trying to use this alias thing as described in your documentation page - https://parceljs.org/module_resolution.html. But it seems to be ignored entirely.

🌍 Your Environment

Software	Version(s)
Parcel	1.12.4
Node	12.16.2
npm/Yarn	6.14.4
Operating System	Latest Ubuntu through Windows Subsystem for Linux

[RichardJECooke]

Aha! My alias path was incorrect. I'd like to change this bug to Please make parcel.js throw a warning or error if an alias path cannot be found when compiling.

I had to change my alias to "vue": "/../node_modules/vue/dist/vue.common.js". and now it works.