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// javascript
var takeSnapshot = function (clientId) {
var videoElem = document.getElementById(clientId);
var canvas = document.getElementById(“chat-paint-canvas”);
var ctx = canvas.getContext(‘2d’);
ctx.drawImage(videoElem, 0, 0, 30, 30);
return canvas.toDataURL();
// html
<canvas height=30” width=30” id=”chat-paint-canvas” style=”display: none”></canvas>
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