I am learning about javascript and css3 games and I am working on an alien game. The game is a guessing game where you enter a guess of X and Y position and the missile moves towards the alien using css3 transition. When the missle reaches the alien the explosion is supposed to appear; but I am having difficulty detecting when the transition is over. Currently the explosion appears right when you make the X and Y guess and the missle takes off. How can I detect with Javascript when the css3 transition is over to make the explosion appear?
Here is what I currently have:
the stylesheet:
#explosion
{
width: 20px;
height: 20px;
position: absolute;
display: none;
background-image: url(../images/explosion.jpg);
}
#alien
{
width: 20px;
height: 20px;
position: absolute;
top: 20px;
left: 80px;
background-image: url(../images/alien.jpg);
}
#missile
{
width: 10px;
height: 10px;
position: absolute;
top: 240px;
left: 145px;
background-image: url(../images/missile.jpg);
/*Transition*/
-webkit-transition: all 0.5s ease-out 0s;
-moz-transition: all 0.5s ease-out 0s;
transition: all 0.5s ease-out 0s;
}
And the Javascript:
if(guessX >= alienX && guessX <= alienX + 20)
{
//Yes, it's within the X range, so now let's
//check the Y range
if(guessY >= alienY && guessY <= alienY + 20)
{
//It's in both the X and Y range, so it's a hit!
gameWon = true;
//move missle towards alien
//make explosion appear
explosion.style.top = alienY + "px";
explosion.style.left = alienX + "px";
explosion.style.display = "block";
endGame();
}
}