you may ask: “If the early browser does not support HTML5 How do I start using it?.” But the question itself would be misleading. HTML5 is just a collection of some of the features, so you can not detect the browser that “whether to support HTML5″, but you can detect whether the browser supports, such as “canvas”, “video”, “geolocation” and so these features.
Canvas Text
Even if your browser supports The Canvas API, there may not support The Canvas Text API, because The Canvas
API is constantly adding new robust continuous content, the text method is then later join into, and some browsers to achieve the completion of The Canvas
API time, The Text API has not been joined, in this case, it will happen to your Browser support The Canvas API does not support The
Canvas Text API.
to detect whether the browser supports The Canvas Text API, then you can use the previously mentioned second method of detection methods. If your browser supports The
Canvas
API, then used to detect when there are elements created

tampering
and mobile, like, Context tools may probably diverted rotate () format to migrate according to the angle will change Canvas painted cloth. rotate () format of this type the following:
void rotate (radian);
Canvas painted cloth used to shift to a clockwise move with the x-axis (horizontal axis) the underlying principles into radian angular position, radian radians system, migration policy after the change of the x-axis while production had ボ subject to change. As tampering will not affect Di Po drawn graphics but it will affect the other day by the tear pro Context Canvas tool.
example of tampering on the inside:

HTML5
Canvas
height = “300″>

var canvas = document.getElementByIdx_x (“canvas”);
var context = canvas.getContext (“2d”);
/ /
var gradient = context.createLinearGradient (0, 0, 200, 0);
/ /
gradient.addColorStop (0, “# 000000″);

/ /
gradient.addColorStop (1, “# cccccc”);
var gradient = context.createLinearGradient (0, 0, 200, 0);

gradient.addColorStop (0, “green”);
gradient.addColorStop (1, “red”);
context.fillStyle = gradient;
< br /> context.fillRect (20,20,200,200);

var c = document.getElementByIdx_x (“myCanvas” );
var con = c.getContext (“2d”);
con.fillStyle = “# FF0000″;
con.fillRect (100, 100, 300, 200);