// from https://www.html5canvastutorials.com/tutorials/html5-canvas-wrap-text-tutorial/

window.document.addEventListener('DOMContentLoaded', function(e) {
  
  function wrapText(context, text, x, y, maxWidth, lineHeight) {
        var words = text.split(' ');
        var line = '';

        for(var n = 0; n < words.length; n++) {
          var testLine = line + words[n] + ' ';
          var metrics = context.measureText(testLine);
          var testWidth = metrics.width;
          if (testWidth > maxWidth && n > 0) {
            context.fillText(line, x, y);
            line = words[n] + ' ';
            y += lineHeight;
          }
          else {
            line = testLine;
          }
        }
        context.fillText(line, x, y);
      }
      
      var canvas = document.getElementById('myCanvas');
      var context = canvas.getContext('2d');
      var maxWidth = 400;
      var lineHeight = 24;
      var x = (canvas.width - maxWidth) / 2;
      var y = 60;
      var text = 'All the world\'s a stage, and all the men and women merely players. They have their exits and their entrances; And one man in his time plays many parts.';

      context.font = '15pt Calibri';
      context.fillStyle = '#333';

      wrapText(context, text, x, y, maxWidth, lineHeight);
  
});