Some useful snippets for Canvas

wrapText.js

Context2d.prototype.fillTextWrap = function (text, x, y, maxWidth, lineHeight) {
    var words = text.split(' '),
        line = '',
        yOffset = 0,
        context = this;

    words.forEach(function (word, index) {
        line += word + ' ';
        if(context.measureText(line).width > maxWidth || index == words.length-1) {
            context.fillText(line, x, y + yOffset);
            line = '';
            yOffset += lineHeight;
        }
    });
};