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JavaScript监听页面复制 代码<script> /** 监听copy事件 */ document.addEventListener("copy",function(e){ //取消默认事件，才能修改复制的值 e.preventDefault(); //复制的内容 var copyTxt = `${window.getSelection(0).toString()}\n————————————————\n原文链接：${window.location.href}\n凌枫博客：http://blog.52wangk.cn，转载请附上原文出处链接及本声明。`; if(e.clipboardData) { e.clipboardData.setData('text/plain', copyTxt); } else if(window.clipboardData){ return window.clipboardData.setData("text", copyTxt); } }) </script> -
JavaScript实现背景随机线条效果 效果展示代码<canvas id="cas"></canvas> <script> var canvas = document.getElementById("cas"); var ctx = canvas.getContext("2d"); resize(); window.onresize = resize; function resize() { canvas.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth; canvas.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight; } var RAF = (function () { return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) { window.setTimeout(callback, 1000 / 60); }; })(); // 鼠标活动时，获取鼠标坐标 var warea = { x: null, y: null, max: 20000 }; window.onmousemove = function (e) { e = e || window.event; warea.x = e.clientX; warea.y = e.clientY; }; window.onmouseout = function (e) { warea.x = null; warea.y = null; }; // 添加粒子 // x，y为粒子坐标，xa, ya为粒子xy轴加速度，max为连线的最大距离 var dots = []; for (var i = 0; i < 300; i++) { var x = Math.random() * canvas.width; var y = Math.random() * canvas.height; var xa = Math.random() * 2 - 1; var ya = Math.random() * 2 - 1; dots.push({ x: x, y: y, xa: xa, ya: ya, max: 6000 }) } // 延迟100秒开始执行动画，如果立即执行有时位置计算会出错 setTimeout(function () { animate(); }, 100); // 每一帧循环的逻辑 function animate() { ctx.clearRect(0, 0, canvas.width, canvas.height); // 将鼠标坐标添加进去，产生一个用于比对距离的点数组 var ndots = [warea].concat(dots); dots.forEach(function (dot) { // 粒子位移 dot.x += dot.xa; dot.y += dot.ya; // 遇到边界将加速度反向 dot.xa *= (dot.x > canvas.width || dot.x < 0) ? -1 : 1; dot.ya *= (dot.y > canvas.height || dot.y < 0) ? -1 : 1; // 绘制点 ctx.fillRect(dot.x - 0.5, dot.y - 0.5, 1, 1); // 循环比对粒子间的距离 for (var i = 0; i < ndots.length; i++) { var d2 = ndots[i]; if (dot === d2 || d2.x === null || d2.y === null) continue; var xc = dot.x - d2.x; var yc = dot.y - d2.y; // 两个粒子之间的距离 var dis = xc * xc + yc * yc; // 距离比 var ratio; // 如果两个粒子之间的距离小于粒子对象的max值，则在两个粒子间画线 if (dis < d2.max) { // 如果是鼠标，则让粒子向鼠标的位置移动 if (d2 === warea && dis > (d2.max / 2)) { dot.x -= xc * 0.03; dot.y -= yc * 0.03; } // 计算距离比 ratio = (d2.max - dis) / d2.max; // 画线 ctx.beginPath(); ctx.lineWidth = ratio / 2; ctx.strokeStyle = 'rgba(0,0,0,' + (ratio + 0.2) + ')'; ctx.moveTo(dot.x, dot.y); ctx.lineTo(d2.x, d2.y); ctx.stroke(); } } // 将已经计算过的粒子从数组中删除 ndots.splice(ndots.indexOf(dot), 1); }); RAF(animate); } </script>
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JS屏蔽禁止控制台F12调试代码 代码如下function endebug(off, code) { if (!off) { !(function (e) { function n(e) { function n() { return u; } function o() { window.Firebug && window.Firebug.chrome && window.Firebug.chrome.isInitialized ? t('on') : ((a = 'off'), console.log(d), console.clear(), t(a)); } function t(e) { u !== e && ((u = e), 'function' == typeof c.onchange && c.onchange(e)); } function r() { l || ((l = !0), window.removeEventListener('resize', o), clearInterval(f)); } 'function' == typeof e && (e = { onchange: e }); var i = (e = e || {}).delay || 500, c = {}; c.onchange = e.onchange; var a, d = new Image(); d.__defineGetter__('id', function () { a = 'on'; }); var u = 'unknown'; c.getStatus = n; var f = setInterval(o, i); window.addEventListener('resize', o); var l; return (c.free = r), c; } var o = o || {}; (o.create = n), 'function' == typeof define ? (define.amd || define.cmd) && define(function () { return o; }) : 'undefined' != typeof module && module.exports ? (module.exports = o) : (window.jdetects = o); })(), jdetects.create(function (e) { var a = 0; var n = setInterval(function () { if ('on' == e) { setTimeout(function () { if (a == 0) { a = 1; setTimeout(code); } }, 200); } }, 100); }); } } endebug(false, function () { // 当有人调试网站，则立即跳转到百度去 window.location.href = 'http://baidu.com' });
