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Traffic lights drill
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function doTrafficLights() { | |
const activeLight = getActiveLight(); | |
switch(activeLight) { | |
case 'red' : turnRed(); | |
break; | |
case 'yellow': turnYellow(); | |
break; | |
case 'green' : turnGreen(); | |
break; | |
} | |
/* | |
if (activeLight === 'red') { | |
turnRed(); | |
} | |
else if (activeLight === 'yellow') { | |
turnYellow(); | |
} | |
else { | |
turnGreen(); | |
} | |
*/ | |
//console.log(activeLight); | |
} | |
// this function randomly returns red, yellow, or green | |
// and is called by doTrafficLights. | |
// don't modify it! | |
function getActiveLight() { | |
return (['red', 'green', 'yellow'])[Math.floor(Math.random() * 3)]; | |
} | |
/* From here down, you are not expected to | |
understand.... for now :) | |
Nothing to see here! | |
*/ | |
function turnOffLights() { | |
$('.traffic-light').removeClass('yellow-on red-on green-on'); | |
} | |
function turnGreen() { | |
turnOffLights(); | |
$('.green-light').addClass('green-on'); | |
} | |
function turnYellow() { | |
turnOffLights(); | |
$('.yellow-light').addClass('yellow-on'); | |
} | |
function turnRed() { | |
turnOffLights(); | |
$('.red-light').addClass('red-on'); | |
} | |
function handleClicks() { | |
$('.js-control-lights').click(function() { | |
doTrafficLights(); | |
}); | |
} | |
$(function() { | |
turnOffLights(); | |
handleClicks(); | |
}); |
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