I have a code that runs setInterval in a function. What I try to achive is to exit from that function after clearInterval occured. I set up a condition to check wheter the interval is cleared. I'm struggling to find a method to return from the main Start() function based on the current state of the code.
Code:
function Start() {
var elementX = document.getElementById('moveMeX')
var elementY = document.getElementById('moveMeY')
elementY.style.top = "0px"
var posX = 0
startPosX = 0
var posY = 0
startPosY = 0
var speed = 1
var xIsMoving = true
var yIsMoving = true
var myIntervalX = setInterval(function() {
if(startPosX == 0) {
posX+=speed
elementX.style.left = posX + 'px'
if(posX==100) {
startPosX = 100
}
}
else if (startPosX==100) {
posX-=speed
elementX.style.left = posX + 'px'
if(posX==0) {
startPosX = 0
}
}
}, 10);
function stopX() {
clearInterval(myIntervalX);
xIsMoving = false
}
elementX.addEventListener("mousedown", stopX);
elementX.addEventListener("mousedown", startY);
function startY() {
var myIntervalY = setInterval(function() {
if(startPosY == 0) {
posY+=speed
elementY.style.top = posY + 'px'
if(posY==100) {
startPosY = 100
}
}
else if (startPosY==100) {
posY-=speed
elementY.style.top = posY + 'px'
if(posY==0) {
startPosY = 0
}
}
}, 10);
function stopY() {
elementY.style.zIndex = "-1";
clearInterval(myIntervalY);
yIsMoving = false
}
elementY.addEventListener("mousedown", stopY);
}
if (xIsMoving === false && yIsMoving === false) {
console.log('stopped')
stopped = true
}
}
Start()
Codepen link: https://codepen.io/silentstorm902/pen/podNxVy
The part you state you have a problem with,
if (xIsMoving === false && yIsMoving === false) {
console.log('stopped')
stopped = true
}
currently only runs once: when Start() is first called. At that time, both conditions are false because the variables have their initial declared values of true.
You could create a new setInterval to run this if statement every so often, but it seems unnecessary because your current stopY function is really the place where you know that both xIsMoving and yIsMoving are both false -- because stopY only runs after stopX has run. So just move your statement of stopped=true at the end of the stopY function:
function stopY() {
elementY.style.zIndex = "-1";
clearInterval(myIntervalY);
yIsMoving = false;
console.log("stopped");
stopped = true;
}