@advanced-rest-client/arc-headers/src/lib/headers-addon.js

A module that contains UI and logic for handle HTTP headers in an HTTP request and request editors.

import addon from './HeadersAddon.js';

/* global CodeMirror */
if (window.CodeMirror) {
  CodeMirror.defineMode('http-headers', addon);
  CodeMirror.defineMIME('message/http-headers', 'http-headers');
}