canvas之抒写文字

<canvas id="canvas" width="500" height="400" style="background-color: yellow;"></canvas>

var canvas=document.getElementById("canvas");
    var cxt=canvas.getContext("2d");
    cxt.font="40px 黑体";
    //绘制实心字
    cxt.fillStyle="red";//填充红色
    cxt.fillText("hello,思思博士",10,50);
    //绘制空心字
    cxt.strokeStyle="red";//红色边
    cxt.strokeText("hello,思思博士",10,100);