前端登录界面

浏览：1417次- 评论：2次- 发布时间：2021-03-06

Html

Css




    
        Login

#canvas {
	box-shadow:0 0 10px #e4ffb8;
}
h1 {
	color:#4c1caa;
	text-align:t;
}
body {
	margin:0;
	padding:0;
	font-family:"montserrat";
	background-image:linear-gradient(125deg,#2c3e50,#27ae60,#2980b9,#e74c3c,#8e44ad);
	background-size:400%;
	animation:bganimation 15s infinite;
	text-shadow:2.5px 5px 0.3125rem royalblue;
	color:#8E44AD;
	font-size:sans-serif;
}
.box {
	width:300px;
	padding:40px;
	position:absolute;
	top:50%;
	left:50%;
	transform:translate(-50%,-50%);
	text-align:center;
}
.box h1 {
	color:greenyellow;
	text-transform:uppercase;
	font-weight:500;
}
.box input[type = "text"],.box input[type = "password"] {
	border:0;
	background:none;
	display:block;
	margin:20px auto;
	text-align:center;
	border:2px solid #3498db;
	padding:14px 10px;
	width:200px;
	outline:none;
	color:white;
	border-radius:24px;
	transition:0.25s;
}
.box input[type = "text"]:focus,.box input[type = "password"]:focus {
	width:280px;
	border-color:#2ecc71;
}
-webkit-input-placeholder {
	color:red;
	font-size:20px;
	line-height:50px;
}
.box input[type = "submit"] {
	border:0;
	background:none;
	display:block;
	margin:20px auto;
	text-align:center;
	border:2px solid #2ecc71;
	padding:14px 40px;
	outline:none;
	color:white;
	border-radius:24px;
	transition:0.25s;
	cursor:pointer;
}
.box input[type = "submit"]:hover {
	background:#2ecc71;
}
.text {
	color:white;
	text-align:center;
	text-transform:uppercase;
	margin:0px 0;
	//控制主背景高度
        	font-size:22px;
}
@keyframes bganimation {
	0% {
	background-position:0% 50%;
}
50% {
	background-position:100% 50%;
}
100% {
	background-position:0% 50%;
}
}

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
canvas.width = 1520; //控制粒子图的宽度
canvas.height = 719;
//  canvas.style.background = '#ff557f';//js背景地

class Ball {
    constructor(x, y, color) {
        this.x = x;
        this.y = y;
        this.color = color;
        this.r = 20;

}

render() {
        ctx.save();
        ctx.beginPath();
        ctx.arc(this.x, this.y, this.r, 0, Math.PI * 2);
        ctx.fillStyle = this.color;
        ctx.fill();
        ctx.restore();
    }

}
let ball = new Ball(50, 50, 'red');
ball.render();

//会移动的小球
class MoveBall extends Ball {
    constructor(x, y, color) {
        super(x, y, color);
        //量的变化
        this.dX = _.random(-5, 5);
        this.dY = _.random(5, 5);
        this.dR = _.random(1, 3);
    }
    upDate() {
        this.x += this.dX;
        this.y += this.dY;
        this.r -= this.dR;
        if (this.r < 0) {
            this.r = 0;
        }
    }

}
//实例化小球
let ballArr = [];
let colorArr = ['red', 'green', 'blue', 'yellow', 'purple', 'pink', 'orange'];
//监听鼠标移动
canvas.addEventListener('mousemove', function(e) {
    //  let e=e||event;
    ballArr.push(new MoveBall(e.offsetX, e.offsetY, colorArr[_.random(0, colorArr.length - 1)]));
    //  console.log(ballArr);
})
//开启定时器
setInterval(function() {
    //清屏
    ctx.clearRect(0, 0, canvas.width, canvas.height)
    //绘制
    for (let i = 0; i < ballArr.length; i++) {
        ballArr[i].render();
        ballArr[i].upDate();
    }
}, 50);

↑上面代码改变，会自动显示代码结果

jQuery调用版本：1.11.3