- Add debounced state updates for title and content (500ms delay) - Immediate UI updates with delayed history saving - Prevent one-letter-per-undo issue - Add cleanup for debounce timers on unmount
shebang-regex 
Regular expression for matching a shebang line
Install
$ npm install shebang-regex
Usage
const shebangRegex = require('shebang-regex');
const string = '#!/usr/bin/env node\nconsole.log("unicorns");';
shebangRegex.test(string);
//=> true
shebangRegex.exec(string)[0];
//=> '#!/usr/bin/env node'
shebangRegex.exec(string)[1];
//=> '/usr/bin/env node'
License
MIT © Sindre Sorhus