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Pointer Events Demonstration
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<span id="support">No multi-touch support</span><br> | |
<canvas id="drawSurface" width="500px" height="500px" style="border:1px solid black;"></canvas> |
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window.addEventListener('load', function() { | |
var canvas = document.getElementById("drawSurface"), | |
context = canvas.getContext("2d"); | |
if (window.navigator.pointerEnabled) { | |
canvas.addEventListener("pointermove", paint, false); | |
if(window.navigator.maxTouchPoints>1) | |
document.querySelector("#support").innerText = "Your hardware supports multi-touch!"; | |
} | |
else { | |
//Provide fallback for user agents that do not support Pointer Events | |
canvas.addEventListener("mousemove", paint, false); | |
} | |
function paint(event) { | |
if(event.buttons>0) | |
context.fillRect(event.clientX, event.clientY, 5, 5); | |
} | |
}); |
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html { | |
touch-action: none; | |
} |
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