HTML:
// Square size
var squareSize = 50;
// Trail size (smaller number means more trail)
var globalAlpha = 0.0025;
// Text
var text = "Lorem Ipsum";
console.clear();
var cnvs = document.getElementById("canvas");
var ctx = cnvs.getcontext("2d");
var windW = window.innerWidth;
cnvs.width = windW - 20;
var cnvsH = cnvs.height;
function MouseMove(XMouse,YMouse) {
console.clear();
ctx.fillStyle = "#000000";
ctx.globalAlpha = 1;
ctx.fillRect(
XMouse - 10 - squareSize / 2,YMouse - 10 - squareSize / 2,squareSize,squareSize
);
}
function handler(e) {
e = e || window.event;
var pageX = e.pageX;
var pageY = e.pageY;
if (pageX === undefined) {
pageX =
e.clientX +
document.body.scrollLeft +
document.documentElement.scrollLeft;
pageY =
e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
}
console.log(pageX,pageY);
MouseMove(pageX,pageY);
}
if (document.attachEvent) document.attachEvent("onmousemove",handler);
else document.addEventListener("mousemove",handler);
var loop = setInterval(function() {
ctx.fillStyle = "#FFFFFF";
ctx.globalAlpha = globalAlpha;
ctx.fillRect(0,windW,CnvsH);
ctx.font = "100px Arial";
ctx.globalAlpha = 1;
ctx.fillStyle = "#000000";
ctx.textAlign = "center";
ctx.fillText(text,windW / 2,cnvsH / 2);
},10);
JS:
{{1}}
可以预见的是一个逐渐消失的正方形,中间带有文本 正方形已正确绘制,但不会发生褪色,也不会显示文本。 我使用codepen进行编码。 它正在运行,但是我想我尝试添加评论,而这样做却破坏了它。我没有高中毕业,所以我没有任何大学经验,我所有的编码都是自学成才和教程(感谢w3schools.com)