[html] How can I write text on a HTML5 canvas element?

Is it possible to write text on HTML5 canvas?

Canvas text support is actually pretty good - you can control font, size, color, horizontal alignment, vertical alignment, and you can also get text metrics to get the text width in pixels. In addition, you can also use canvas transforms to rotate, stretch and even invert text.

Drawing text on a Canvas

Markup:

<canvas id="myCanvas" width="300" height="150"></canvas>

Script (with few different options):

<script>
    var canvas = document.getElementById('myCanvas');
    var ctx = canvas.getContext('2d');
    ctx.font = 'italic 18px Arial';
    ctx.textAlign = 'center';
    ctx. textBaseline = 'middle';
    ctx.fillStyle = 'red';  // a color name or by using rgb/rgba/hex values
    ctx.fillText('Hello World!', 150, 50); // text and position
</script>

Check out the MDN documentation and this JSFiddle example.

Depends on what you want to do with it I guess. If you just want to write some normal text you can use .fillText().

Yes of course you can write a text on canvas with ease, and you can set the font name, font size and font color. There are two method to build a text on Canvas, i.e. fillText() and strokeText(). fillText() method is used to make a text that can only be filled with color, whereas strokeText() is used to make a text that can only be given an outline color. So if we want to build a text that filled with color and have outline color, we must use both of them.

here the full example, how to write text on canvas :

<canvas id="Canvas01" width="400" height="200" style="border:2px solid #bbb; margin-left:10px; margin-top:10px;"></canvas>

<script>
  var canvas = document.getElementById('Canvas01');
  var ctx = canvas.getContext('2d');

  ctx.fillStyle= "red";
  ctx.font = "italic bold 35pt Tahoma";
  //syntax : .fillText("text", x, y)
  ctx.fillText("StacOverFlow",30,80);

</script>

Here the demo for this, and you can try your self for any modification: http://okeschool.com/examples/canvas/html5-canvas-text-color

It is really easy to write text on a canvas. It was not clear if you want someone to enter text in the HTML page and then have that text appear on the canvas, or if you were going to use JavaScript to write the information to the screen.

The following code will write some text in different fonts and formats to your canvas. You can modify this as you wish to test other aspects of writing onto a canvas.

 <canvas id="YourCanvasNameHere" width="500" height="500">Canvas not supported</canvas>

 var c = document.getElementById('YourCanvasNameHere');
 var context = c.getContext('2d'); //returns drawing functions to allow the user to draw on the canvas with graphic tools. 

You can either place the canvas ID tag in the HTML and then reference the name or you can create the canvas in the JavaScript code. I think that for the most part I see the <canvas> tag in the HTML code and on occasion see it created dynamically in the JavaScript code itself.

Code:

  var canvas = document.getElementById('myCanvas');
  var context = canvas.getContext('2d');

  context.font = 'bold 10pt Calibri';
  context.fillText('Hello World!', 150, 100);
  context.font = 'italic 40pt Times Roman';
  context.fillStyle = 'blue';
  context.fillText('Hello World!', 200, 150);
  context.font = '60pt Calibri';
  context.lineWidth = 4;
  context.strokeStyle = 'blue';
  context.strokeText('Hello World!', 70, 70);

I found a good tutorial on oreilly.com.

Example code:

<canvas id="canvas" width ='600px'></canvas><br />
Enter your Text here .The Text will get drawn on the canvas<br />
<input type="text" id="text" onKeydown="func();"></input><br />
</body><br />
<script>
function func(){
var e=document.getElementById("text"),t=document.getElementById("canvas"),n=t.getContext("2d");
n.fillStyle="#990000";n.font="30px futura";n.textBaseline="top";n.fillText(e.value,150,0);n.fillText("thank you, ",200,100);
n.fillText("Created by ashish",250,120)
}
</script>

courtesy: @Ashish Nautiyal

It is easy to write text to a canvas. Lets say that you canvas is declared like below.

<html>
  <canvas id="YourCanvas" width="500" height="500">
   Your Internet Browser does not support HTML5 (Get a new Browser)
  </canvas>
</html>

This part of the code returns a variable into canvas which is a representation of your canvas in HTML.

  var c  = document.getElementById("YourCanvas");

The following code returns the methods for drawing lines, text, fills to your canvas.

  var ctx = canvas.getContext("2d");

<script>
  ctx.font="20px Times Roman";
  ctx.fillText("Hello World!",50,100);

  ctx.font="30px Verdana";

  var g = ctx.createLinearGradient(0,0,c.width,0);

  g.addColorStop("0","magenta");
  g.addColorStop("0.3","blue");
  g.addColorStop("1.0","red");

  ctx.fillStyle=g; //Sets the fille of your text here. In this case it is set to the gradient that was created above. But you could set it to Red, Green, Blue or whatever.

  ctx.fillText("This is some new and funny TEXT!",40,190);
</script>

There is a beginners guide out on Amazon for the kindle http://www.amazon.com/HTML5-Canvas-Guide-Beginners-ebook/dp/B00JSFVY9O/ref=sr_1_4?ie=UTF8&qid=1398113376&sr=8-4&keywords=html5+canvas+beginners that is well worth the money. I purchased it a couple of days ago and it showed me a lot of simple techniques that were very useful.