On Canvas

Question

What is meant by ctx in canvas

Answer 1

"ctx" generally represents the name of the canvas object. That doesnt have to be "ctx", often you can also meet "context". You can use also something different:

var canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");

than: ctx.fill(), ctx.beginPath(), ctx.fillStyle()....

or

var canvas = document.getElementById("canvas");
context = canvas.getContext("2d");

than: context.fill(), context.beginPath(), context.fillStyle()....

or for example

var canvas = document.getElementById("canvas");
myCanvas = canvas.getContext("2d");

than: myCanvas.fill(), myCanvas.beginPath(), myCanvas.fillStyle()....