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2022-09-07
JS正则限制只能输入数字、或带小数点的数字,并且小数后面限制多少位
JS正则限制只能输入数字、或带小数点的数字,并且小数后面限制多少位length 代表如果输入含小数位的时候,小数位的个数const length = 2 const reg = new RegExp(`^\\d+(\\.\\d{1,${length}})?$`)
2022年09月07日
1,318 阅读
0 评论
63 点赞
2022-09-05
禁止F12元素审查
很多时候我们辛辛苦苦弄的代码被很多人按一个F12直接白嫖走了,感觉自己的付出被白嫖是不是非常的伤心、郁闷,甚至是气愤、愤怒。 删除线效果 下面和大家介绍一种方式。直接在页脚文件foot.php或者footer.php最下方放入以下代码:<script> function fuckyou(){ window.close(); //关闭当前窗口(防抽) window.location="about:blank"; //将当前窗口跳转置空白页 } function click(e) { if (document.all) { if (event.button==2||event.button==3) { alert("禁止恶意拿代码的"); oncontextmenu='return false'; } } if (document.layers) { if (e.which == 3) { oncontextmenu='return false'; } } } if (document.layers) { fuckyou(); document.captureEvents(Event.MOUSEDOWN); } document.onmousedown=click; document.oncontextmenu = new Function("return false;") document.onkeydown =document.onkeyup = document.onkeypress=function(){ if(window.event.keyCode == 123) { fuckyou(); window.event.returnValue=false; return(false); } } </script>
2022年09月05日
7,450 阅读
0 评论
45 点赞
2022-09-03
为你的网站添加点击散开特效
将以下代码复制到你网站最底部即可实现<canvas id="fireworks" style="position: fixed; left: 0px; top: 0px; pointer-events: none; z-index: 2147483647; width: 1920px; height: 151px;" width="3840" height="302"></canvas> <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/animejs@3.0.1/lib/anime.min.js"></script> <script type="text/javascript"> function updateCoords(e) { pointerX = (e.clientX || e.touches[0].clientX) - canvasEl.getBoundingClientRect().left, pointerY = e.clientY || e.touches[0].clientY - canvasEl.getBoundingClientRect().top } function setParticuleDirection(e) { var t = anime.random(0, 360) * Math.PI / 180, a = anime.random(50, 180), n = [-1, 1][anime.random(0, 1)] * a; return { x: e.x + n * Math.cos(t), y: e.y + n * Math.sin(t) } } function createParticule(e, t) { var a = {}; return a.x = e, a.y = t, a.color = colors[anime.random(0, colors.length - 1)], a.radius = anime.random(16, 32), a.endPos = setParticuleDirection(a), a.draw = function() { ctx.beginPath(), ctx.arc(a.x, a.y, a.radius, 0, 2 * Math.PI, !0), ctx.fillStyle = a.color, ctx.fill() }, a } function createCircle(e, t) { var a = {}; return a.x = e, a.y = t, a.color = "#F00", a.radius = .1, a.alpha = .5, a.lineWidth = 6, a.draw = function() { ctx.globalAlpha = a.alpha, ctx.beginPath(), ctx.arc(a.x, a.y, a.radius, 0, 2 * Math.PI, !0), ctx.lineWidth = a.lineWidth, ctx.strokeStyle = a.color, ctx.stroke(), ctx.globalAlpha = 1 }, a } function renderParticule(e) { for (var t = 0; t < e.animatables.length; t++) e.animatables[t].target.draw() } function animateParticules(e, t) { for (var a = createCircle(e, t), n = [], i = 0; i < numberOfParticules; i++) n.push(createParticule(e, t)); anime.timeline().add({ targets: n, x: function(e) { return e.endPos.x }, y: function(e) { return e.endPos.y }, radius: .1, duration: anime.random(1200, 1800), easing: "easeOutExpo", update: renderParticule }).add({ targets: a, radius: anime.random(80, 160), lineWidth: 0, alpha: { value: 0, easing: "linear", duration: anime.random(600, 800) }, duration: anime.random(1200, 1800), easing: "easeOutExpo", update: renderParticule, offset: 0 }) } function debounce(fn, delay) { var timer return function() { var context = this var args = arguments clearTimeout(timer) timer = setTimeout(function() { fn.apply(context, args) }, delay) } } var canvasEl = document.querySelector("#fireworks"); if (canvasEl) { var ctx = canvasEl.getContext("2d"), numberOfParticules = 30, pointerX = 0, pointerY = 0, tap = "mousedown", colors = ["#FF1461", "#18FF92", "#5A87FF", "#FBF38C"], setCanvasSize = debounce(function() { canvasEl.width = 2 * window.innerWidth, canvasEl.height = 2 * window.innerHeight, canvasEl.style.width = window.innerWidth + "px", canvasEl.style.height = window.innerHeight + "px", canvasEl.getContext("2d").scale(2, 2) }, 500), render = anime({ duration: 1 / 0, update: function() { ctx.clearRect(0, 0, canvasEl.width, canvasEl.height) } }); document.addEventListener(tap, function(e) { "sidebar" !== e.target.id && "toggle-sidebar" !== e.target.id && "A" !== e.target.nodeName && "IMG" !== e.target.nodeName && (render.play(), updateCoords(e), animateParticules(pointerX, pointerY)) }, !1), setCanvasSize(), window.addEventListener("resize", setCanvasSize, !1) } </script>
2022年09月03日
5,254 阅读
0 评论
33 点赞
2022-09-02
JS唤醒win10消息通知
// 判断浏览器是否支持唤醒 if (window.Notification) { let popNotice = () => { if (!Notification.permission === 'granted') return const notification = new Notification('阿巴阿巴', { body: '提示提示提示' }) // 点击通知的回调函数 notification.onclick = function () { window.open('https://baidu.com') notification.close() } } /* 授权过通知 */ if (Notification.permission === 'granted') { popNotice() } else { /* 未授权,先询问授权 */ Notification.requestPermission(function (permission) { popNotice() }) } }{callout color="#29bd00"}如果是WIN10系统的话,可以直接将上面代码复制到F12控制台运行{/callout}
2022年09月02日
3,569 阅读
0 评论
43 点赞
2022-09-01
原生JS实现一个验证码功能
定义一个用于显示验证码的canvas<canvas width="100" height="40"></canvas>生成JS的业务逻辑// 获取canvas let canvas = document.querySelector("canvas") let context = canvas.getContext("2d"); // 定义初始化验证码内容 let nums = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0", 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R','S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x','y', 'z']; drawCode() // 绘制验证码 function drawCode() { context.beginPath() /* 绘制背景色 */ context.fillStyle = "cornflowerblue"; context.fillRect(0, 0, canvas.width, canvas.height) /* 绘制验证码 */ context.fillStyle = "white"; context.font = "25px Arial"; let rand = [], x = [], y = [] for (let i = 0; i < 5; i++) { rand[i] = nums[Math.floor(Math.random() * nums.length)] x[i] = i * 16 + 10; y[i] = Math.random() * 20 + 20; context.fillText(rand[i], x[i], y[i]); } /* rand就是生成后的结果, 后面用来判断验证码输入框是否与该值相等 */ console.log(rand); //画3条随机线 for (let i = 0; i < 3; i++) { drawline(canvas, context); } // 画30个随机点 for (let i = 0; i < 30; i++) { drawDot(canvas, context); } } // 随机线 function drawline(canvas, context) { //随机线的起点x坐标是画布x坐标0位置,y坐标是画布高度的随机数 context.moveTo(Math.floor(Math.random() * canvas.width), Math.floor(Math.random() * canvas.height)); //随机线的终点x坐标是画布宽度,y坐标是画布高度的随机数 context.lineTo(Math.floor(Math.random() * canvas.width), Math.floor(Math.random() * canvas.height)); context.lineWidth = 0.5; context.strokeStyle = 'rgba(50,50,50,0.3)'; context.stroke(); } // 随机点 function drawDot(canvas, context) { let px = Math.floor(Math.random() * canvas.width); let py = Math.floor(Math.random() * canvas.height); context.moveTo(px, py); context.lineTo(px + 1, py + 1); context.lineWidth = 0.2; context.stroke(); }
2022年09月01日
3,746 阅读
0 评论
44 点赞
2022-08-27
一些实用的函数
/** * @description: 校验身份证 * @param {*} * @return {*} */ export const validateIDCard = value => /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(value); /** * @description: 校验支付宝账号 * @param {*} * @return {*} */ export const validateAlipay = value => /^1\d{10}$|^[a-zA-Z\d._-]*\@[a-zA-Z\d.-]{1,10}\.[a-zA-Z\d]{1,20}$/.test(value); /** * @description: 校验银行卡 * @param {*} * @return {*} */ export const validateBankCode = value => /^\d{13,19}$/.test(value); /** * @description: 校验手机号 * @param {*} * @return {*} */ export const validatePhone = value => /^1\d{10}$/.test(value); /** * @description: 函数节流 * @param {*} * @return {*} */ export const throttle = function (fn, delay = 1000) { let prev = 0; return function () { const now = Date.now(); if (now - prev > delay) { fn.apply(this, arguments); prev = Date.now(); } } } /** * @description: 获取随机字符串 * @param {*} * @return {*} */ export const randomString = () => Math.random().toString(36).substr(2); /** * @description: 将 BASE64 转换文件 * @param {*} * @return {*} */ export const dataURLtoFile = (dataurl, filename) => { const arr = dataurl.split(','); const mime = arr[0].match(/:(.*?);/)[1]; if (!filename) filename = `${Date.parse(new Date())}.jpg`; const bstr = window.atob(arr[1]); let n = bstr.length; const u8arr = new Uint8Array(n); while (n--) { u8arr[n] = bstr.charCodeAt(n); } return new File([u8arr], filename, { type: mime }); } /** * @description: 压缩图片 * @param {*} * @return {*} */ export const compressImg = file => { const fileSize = parseFloat(Number.parseInt(file.size, 10) / 1024 / 1024).toFixed(2); const reader = new FileReader(); reader.readAsDataURL(file); return new Promise((resolve) => { reader.onload = e => { const img = new Image(); img.src = e.target.result; img.onload = () => { const w = img.width; const h = img.height; const canvas = document.createElement('canvas'); const ctx = canvas.getContext('2d'); let base64; canvas.setAttribute('width', w); canvas.setAttribute('height', h); ctx.drawImage(img, 0, 0, w, h); if (fileSize <= 1) { base64 = canvas.toDataURL(file.type, 1); } else if (fileSize <= 3) { base64 = canvas.toDataURL(file.type, 0.8); } else if (fileSize <= 5) { base64 = canvas.toDataURL(file.type, 0.5); } else { base64 = canvas.toDataURL(file.type, 0.1); } let fileName = file.name; fileName = fileName.replace(/^(.+)\.(.+)$/, (fullName, name, suffix) => name + Math.floor(Math.random() * (9999 - 1000) + 1000) + '.' + suffix); resolve(dataURLtoFile(base64, fileName)); }; }; }); }
2022年08月27日
5,349 阅读
0 评论
135 点赞
2020-08-12
支持赞赏
微信扫下方二维码支持博客!!感觉大哥的0.01
2020年08月12日
14,435 阅读
0 评论
211 点赞