What is the regex for package.json script?

The regex pattern for package.json script is `"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"`. This pattern validates package.json script entry ("name": "command").

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"/i`) or use `re.IGNORECASE` in Python.

Regex for package.json Script

Regex Pattern

"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"

package.json script entry ("name": "command")

Quick Answer

The regex pattern for package.json script is `"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"`. package.json script entry ("name": "command"). This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
"build": "next build"	✓ Matches
"dev": "vite"	✓ Matches
"test:unit": "vitest"	✓ Matches
build: next build	✗ No match
not json	✗ No match
"key"	✗ No match

Code Examples

javascript

const regex = /"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"/;
const isValid = regex.test(value);

python

import re
pattern = r'"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/"([a-zA-Z0-9:_-]+)"\s*:\s*"([^"]*)"/', $value)) {
    echo "valid";
}

java

String pattern = ""([a-zA-Z0-9:_-]+)"\\s*:\\s*"([^"]*)"";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

Related Regex Patterns

JavaScript Variable Name

Valid JavaScript variable/identifier name

Python Variable Name

Valid Python identifier name

CSS Class Name

Valid CSS class name (starts with letter, underscore, or hyphen)

CSS ID Selector

CSS ID selector starting with #

JSON Key

JSON object key (quoted string followed by colon)

Semantic Version (Strict)

Strict semantic versioning (MAJOR.MINOR.PATCH)