Encountering a problem with Vite and PostCSS: "Assignment to invalid left-hand side"

Yesterday everything was running smoothly, but today I encountered an error message saying

Invalid left-hand side in assignment
. When I checked the Chrome console, it displayed the same error related to a file named ${mod.url} pointing to this source code:

var createContext = (ctx) => {
  ctx = Object.assign({
    cwd: process.cwd(),
    env: "development"
  }, ctx);
  if (!ctx.env) {
    "development" = "development"; // <-- pointing to this line
  }
  return ctx;
};

Upon investigation, I discovered that the problematic file is

node_module/postcss-load-config/index.js
, and the relevant code snippet is as follows:

const createContext = (ctx) => {
  ctx = Object.assign({
    cwd: process.cwd(),
    env: process.env.NODE_ENV
  }, ctx)

  if (!ctx.env) {
    process.env.NODE_ENV = 'development' // <-- HERE!
  }

  return ctx
}

I have tried deleting the node_module directory, removing docker containers and images, updating dependencies in

package.json</code, and even removing <code>postcss
without success. The website uses the latest versions of Vite, Vue, and Tailwindcss.

This issue has become quite challenging for me, so any assistance would be greatly appreciated.

Thank you,

Answer №1

After removing some code, the program started functioning properly

import { createLogger } from 'vite'
export createLogger

We can modify this to:

export const logger = console.log.bind(console)

Upon further investigation, I realized that I was using certain node utilities in a browser environment.

Answer №2

There appears to be a common issue where code editors insert import statements automatically, even when not needed. This happened to me too. It is possible that you accidentally added an import statement without realizing it. By removing the unnecessary import statement, the error was resolved.

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