html5 - Write text inside rectangle -

i trying find how filltext inside rectangle. unfortunately can find c# projects/tutorials. possible add text inside rectangle in html5 in canvas? want each rectangle (node) have different text on example 1 called cow , other tiger , on. possible? have tried everything!

 var x = 150;     var y = 100;     var canvas = $('#nodelist').get(0); var ctx = canvas.getcontext('2d'); ctx.font = "30px arial";  canvas.height = 0;  var rects = [      [20, 20, x, y],     [20, 220, x, y],     [20, 420, x, y],     [20, 620, x, y],     [20, 820, x, y],     [20, 1020, x, y],     [20, 1220, x, y],     [20, 1420, x, y],     [20, 1620, x, y]    ]; (var = 0; < rects.length; i++) {     canvas.height = canvas.height + 200;     ctx.clearrect(0, 0, canvas.width, canvas.height);     //rectangles opnieuw tekenen     (var j = 0; j < i; j++) {         ctx.fillrect(rects[j][0],         rects[j][1],         rects[j][2],         rects[j][3]);     }     ctx.fillrect(rects[i][0],     rects[i][1],     rects[i][2],     rects[i][3]);  }  $('#nodelist').click(function (e) {     var x = e.offsetx,         y = e.offsety;      (var = 0; < rects.length; i++) {         if (x > rects[i][0] && x < rects[i][0] + rects[i][2] && y > rects[i][1] && y < rects[i][1] + rects[i][3]) {             alert('vierkant ' + + ' clicked');         }     } });    enter code here 

i hope link out....

http://andreinc.net/2012/11/14/painting-and-wrapping-a-text-inside-a-rectangular-area-html5-canvas/