Hi,
I am new to SlimJs and trying to use the data binding for some SVG attributes.

Slim.tag(
	'maze-board',
	`<svg class="maze-grid" bind:width="maxWidth" bind:height="maxHeight"></svg>`,
	class MazeBoard extends Slim {
		onBeforeCreated() {
			this.maxWidth = 1000;
			this.maxHeight = 1000;
		}
	});

But I a m getting the following error:

Slim.js:990 Uncaught TypeError: Cannot assign to read only property 'width' of object '#'
at Slim.js:990
at Function.commit (Slim.js:386)
at Function.commit (Slim.js:414)
at HTMLElement._executeBindings (Slim.js:528)
at doRender (Slim.js:647)

Am I doing something wrong here?