Style.length和Style.width不起作用

Question

    console.log(document.getElementById("myCanvas").style.length);

I have this code in my program. It returns 0, despite the length of the canvas being 660. Does anyone know why?

Answer 1

You can get the width and height through this.

var canvas = document.getElementById("myCanvas");
var width = canvas.width;
var height = canvas.height;

Answer 2

In CSS there is no length attribute, there is just height or width. You can use this:

console.log(document.getElementById("myCanvas").style.height);
console.log(document.getElementById("myCanvas").style.width);