Sound does not play

p5.js Libraries
1

I tried to write a program that works on mobile (apple) devices. Everything works except for the sound.
This is my code:

// A sound file object
var dingdong;


function preload() {
  // Load the sound file.
  // We have included both an MP3 and an OGG version.
  soundFormats('mp3', 'ogg');
  dingdong = loadSound('bell.mp3');
}

function setup(){
createCanvas(windowWidth,windowHeight);
	background(100);
}
function draw(){
background(100);
	fill(0,256,0);
	ellipse(mouseX,mouseY,80,100);
	if(millis()>=5000){
fill(256);
		if(touchEnded());
		playSound(dingdong);

	}
}
2

This is not the correct usage of touchEnded(). Touch ended is not a function you call to get a true/false value. It is a function that you implement that gets called when a touch action ends (the user lifts their finger of the screen).

This is what you probably want:

function touchEnded() {
  playSound(dingdong);
}

Also your if statement syntax is wrong:

    // An if statement with no block (i.e. curly braces { }) will apply to the subsequent statement, however the ; brings an end to the if statement, so the next line is not part of it.
    if (touchEnded());
    // So in this case playSound would run regardless of what touchEnded() returned
    playSound(dingdong);

In this case it is mostly academic because this code just crashes because touchEnded is undefined. However, as a rule I think it is best to always use the block form of if statements and loops:

    if (condition) {
      playSound(dingdong);
    }

Also it is a good idea to check the JavaScript console for errors as a first step when debugging issues.