z-lock

Since it's a CommonJS module, it must be used alongside with Browserify, or something similar, like WebPacker.

Example, explanation

var lock = require('z-lock');
var a_lock = new lock();
 
a_lock.isLocked(); // returns false
 
// Let the examples tell the story
a_lock.lock();
a_lock.isLocked(); // returns true
 
a_lock.unLock();
a_lock.isLocked(); // returns false

License

MIT