Troubleshooting JSON Parse Error in Your package.json File

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Common Causes of JSON Parse Errors

Syntax Errors

All keys and string values must be enclosed in double quotes.

There should be no trailing commas.

Proper use of colons and commas to separate keys and values.

Example of Syntax Error:

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The trailing comma after "express": "^4.17.1" should be removed.

Missing or Extra Brackets
Another common issue is missing or extra curly braces {} and square brackets []. JSON objects should start with { and end with }, and arrays should start with [ and end with ].

Example:

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Notice that the comma is missing after "version": "1.0.0", causing a parse error.

Invalid Characters

Incorrect Data Types
JSON values must be appropriately typed. Strings should be in double quotes, numbers should not be quoted, and Boolean values must be lowercase true or false.

Example of Incorrect Data Types:

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How to Resolve JSON Parse Errors

Validate Your JSON
Use an online JSON validator to check for syntax errors and fix them accordingly. Many code editors also have built-in JSON validation tools and plugins that can assist you in identifying issues.

Use a Package Manager

Double-Check Your Edits