VS Code报Request vscode/content异常，Babel转译失败求助

Got it, let's break down what's happening here and get your ES6-to-ES5 transpilation working smoothly.

First off, that green underline in your .babelrc is the root cause of both the transpilation failure and that vague VS Code error. Here's why:

.babelrc is a JSON file, and JSON doesn't support single-line // comments at all. The editor is flagging this invalid syntax, and Babel can't parse the broken configuration file—hence why your code wouldn't transpile until you removed it.

Step 1: Fix your Babel configuration #

You have two solid options to fix this:

Option 1: Use valid JSON (no comments)

Just strip out the comment to make your .babelrc valid JSON:

{
  "presets": ["latest"]
}

Option 2: Switch to .babelrc.js (recommended for flexibility)

If you want to keep comments or use more dynamic configuration, rename your file to .babelrc.js—this lets you use regular JavaScript syntax, which supports comments:

module.exports = {
  // This comment is totally allowed now!
  presets: ["latest"]
};

Step 2: Ensure your dependencies are set up right #

Make sure you've installed the necessary Babel packages to transpile ES6 to ES5:
For the latest preset:

npm install --save-dev babel-core babel-preset-latest

Note: For newer projects, babel-preset-latest is deprecated—we recommend switching to @babel/preset-env instead, which automatically targets the browsers you need. Here's how:

1. Install the updated dependencies:

   npm install --save-dev @babel/core @babel/preset-env
   

2. Update your config (either .babelrc or .babelrc.js):

   {
     "presets": ["@babel/preset-env"]
   }
   

Step 3: Fix the VS Code "Request vscode/content failed" error #

That weird error is just VS Code's Babel-related extensions choking on the invalid JSON in your original .babelrc. Once you fix the configuration file, the error should disappear on its own. If it sticks around:

• Restart VS Code to clear any cached issues
• Disable and re-enable any Babel plugins you have installed
• Check the VS Code Output panel (View → Output) and filter for "Babel" to see if there's more detailed error info to debug with

内容的提问来源于stack exchange，提问作者Cloud-lingo