What is the regex for javascript require statement?

The regex pattern for javascript require statement is `(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require$['"][^'"]+['"]$`. This pattern validates commonjs require statement in node.js.

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require$['"][^'"]+['"]$/;` 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'(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require$['"][^'"]+['"]$', 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 (`/(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require$['"][^'"]+['"]$/i`) or use `re.IGNORECASE` in Python.

Regex for JavaScript Require Statement

Regex Pattern

(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require$['"][^'"]+['"]$

CommonJS require statement in Node.js

Quick Answer

The regex pattern for javascript require statement is `(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require$['"][^'"]+['"]$`. CommonJS require statement in Node.js. This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
const fs = require('fs')	✓ Matches
const { join } = require('path')	✓ Matches
var express = require('express')	✓ Matches
import fs from 'fs'	✗ No match
require('fs')	✗ No match
const x = 1	✗ No match

Code Examples

javascript

const regex = /(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require\(['"][^'"]+['"]\)/;
const isValid = regex.test(value);

python

import re
pattern = r'(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require\(['"][^'"]+['"]\)'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require\(['"][^'"]+['"]\)/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/(?:const|let|var)\s+(?:\{[^}]*\}|[a-zA-Z_$][\w$]*)\s*=\s*require\(['"][^'"]+['"]\)/', $value)) {
    echo "valid";
}

java

String pattern = "(?:const|let|var)\\s+(?:\\{[^}]*\\}|[a-zA-Z_$][\\w$]*)\\s*=\\s*require\\(['"][^'"]+['"]\\)";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

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

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Semantic Version (Strict)

Strict semantic versioning (MAJOR.MINOR.PATCH)