Node.js React项目package.json构建脚本执行失败（JSON语法错误）

Hey there, let's get this build error sorted out—this is almost always a JSON syntax mistake in your package.json file, which both Yarn and npm can't parse correctly. Here's how to fix it step by step:

1. Locate and fix the JSON syntax error #

The error points directly to position 175 in your package.json, so start by opening the file and checking that area. Common culprits include:

• A trailing comma after the last key-value pair in an object (JSON doesn't allow these!)
• Mismatched curly braces ({/}) or quotes (make sure all strings are wrapped in straight double quotes)
• A missing comma between key-value pairs

To make this easier:

• Use a code editor like VS Code, which will highlight JSON syntax errors in red automatically.
• Run this command in your project folder to get a detailed breakdown of the error:

  node -e "require('./package.json')"
  

  Node.js will try to load your package.json and spit out a precise error message about what's wrong.

For example, if you have something like this (note the trailing comma after "build"):

"scripts": {
  "start": "react-scripts start",
  "build": "react-scripts build",
}

You'll need to remove that extra comma to fix the syntax.

2. Verify the fix #

Once you've corrected the syntax, test it first with npm (since you mentioned it gives more detailed errors):

npm run build

If this works, the JSON issue is resolved. You can then try running yarn build again—it should now succeed too.

3. Clean package manager caches (if needed) #

If you still see errors after fixing the JSON, the cache might be holding onto a corrupted version of your package.json:

• For Yarn:

  yarn cache clean
  

• For npm:

  npm cache clean --force
  

After cleaning, re-run the build command.

4. Check for hidden issues (rare) #

If all else fails, make sure your package.json is saved in UTF-8 encoding (no weird special characters or full-width punctuation marks) and that there are no invisible whitespace characters messing up the parsing.

内容的提问来源于stack exchange，提问作者Nompumelelo