20 lines
		
	
	
		
			493 B
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			20 lines
		
	
	
		
			493 B
		
	
	
	
		
			HTML
		
	
	
	
	
	
<canvas id="mainCanvas"></canvas>
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<script>
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    function x(){
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        const body = document.querySelector("body"), 
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              canvas = document.querySelector("canvas"), 
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              context = canvas.getContext("2d");
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        canvas.setAttribute("width", body.offsetWidth);
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        canvas.setAttribute("height", body.offsetHeight);
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        context.clearRect(0, 0, body.offsetWidth, body.offsetHeight);
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        requestAnimationFrame(x);
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    };
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    requestAnimationFrame(x);
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</script> |