ES2016_Timebomb.js

let timebomb = {
    wires: function() {
        Object.observe(this, (changes) => {
            // It's the blue wire.
            if(change.name !== 'defuse') this.charge();
        });
    },
    clock: null,
    charge: null,
    defuse: function(){
    	clearTimeout(this.clock);
    },
    arm: function(time, callback) {
        this.defuse = callback;
    	this.clock = setTimeout(callback, time);
    }
};

// Usage: 
setTimeout(()=>{
	timebomb.arm(3000, ()=>{
    	console.log('boom!');
    });

    timebomb.defuse();
}, 1000);