Share JavaScript code with CodeThis

What you get

• JavaScript-aware syntax highlighting via CodeMirror
• Instant shareable link — no signup required
• Optional expiration (7 days, 30 days, permanent)
• Password protection for private pastes
• Works with the REST API and MCP server
• Rich markdown and MDC components alongside code

Common use cases for JavaScript pastes

• Browser scripts and DOM helpers
• Node.js one-liners and scripts
• React / Vue component examples
• Bug reproductions for maintainers

Example

const once = (fn) => {
  let called = false, result
  return (...args) => {
    if (called) return result
    called = true
    return (result = fn(...args))
  }
}