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HTML5 - Beginners - indexOf inventory find.html
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HTML5 - Beginners - indexOf inventory find.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width" />
</head>
<body bgcolor="black">
<div id="test"></div>
<style>#myCanvas {touch-action: none;}</style>
<canvas id="myCanvas" width="320" height="240" style="border:0px solid #d3d3d3;">
Use different browser.
</canvas>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
// create a array with items.
var items = ['Blight Sword','Razor Shield','Potion of Healing','Leather Boots'];
// copy the contents from items into our inventory.
var inventory = [...items];
// Add a item we do not have yet to the items.
items.push('Invisible Hat');
gameloop=setInterval(doGameLoop,16);
function doGameLoop(){
myCanvas.height = window.innerHeight-32;
myCanvas.width = window.innerWidth-32;
ctx.fillStyle="rgb(0,0,0)";
ctx.fillRect(0,0,c.width,c.height);
ctx.fillStyle="rgb(255,255,255)";
ctx.fillText("Javascript Html canvas example.",10,10);
//
// Here we check our inventory with all
// the items in the game. Telling us
// what we have and what we do not have.
//
ctx.fillStyle='white';
// loop thought every item in the game.
var y=0;
for(var i of items){
// Do we have the next item on the list
// this is done with the indexOf() command
var a = inventory.indexOf(i);
// you can also use includes() which
// returns true or false if a item is in the
// array. indexOf return the slot in the array
// where the item is found.
if(a>=0){
ctx.fillText("Owned item : "+i,100,50+y);
}else{
ctx.fillText("Unowned item : "+i,100,50+y);
}
// text line 1 down.
y+=30;
}
}
</script>
</body>
</html>