You Don't Know the Hack tech in the frontend development

你所不知道的前端黑科技

css in js animation

https://www.ifchange.com/

live demo

See the Pen css in js 黑科技 by xgqfrms
(@xgqfrms) on CodePen.

js hover/over event

https://www.ifchange.com/about#done

onmouseover

https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseover_event

// 单行写一个评级组件
let rate = 1;
"★★★★★☆☆☆☆☆".slice(5 - rate, 10 - rate);
// "★☆☆☆☆"

JavaScript 错误处理

// JavaScript Error & StackOverflow

const log = console.log;

try {
// throw new Error(`ts`);// ts
const err = {
type: "ts",
message: "ts error",
};
// throw new Error(err);
throw new Error(JSON.stringify(err));
} catch (e) {
log(e, typeof e, e.message)
// Error: {"type":"ts","message":"ts error"}
// "object" "{"type":"ts","message":"ts error"}"
const obj = JSON.parse(e.message)
log(obj)
const {
type,
message,
} = obj;
window.parent.location.href = `https://stackoverflow.com/search?q=[${type}]+${message}`;
}
// JavaScript Error & StackOverflow

const log = console.log;

try {
const err = {
type: "ts",
message: "ts error",
};
throw new Error(JSON.stringify(err));
} catch (e) {
// log(e, typeof e, e.message)
const {
type,
message,
} = JSON.parse(e.message);
window.parent.location.href = `https://stackoverflow.com/search?q=[${type}]+${message}`;
}

CSS 黑科技

UI 结构检测,加 1px 边框

// UI 结构检测,加 1px 边框

[].forEach.call($$("*"), function(a){
a.style.outline="1px solid #"+(~~(Math.random()*(1<<24))).toString(16)
}) // OR
Array.prototype.forEach.call(document.querySelectorAll('*'), dom => dom.style.outline = `1px solid #${parseInt(Math.random() * Math.pow(2,24)).toString(16)}`);
void 0 === undefined
// true
Array(6).fill(8)

//  (6) [8, 8, 8, 8, 8, 8]

// 金融数字格式化
// 1234567890 --> 1,234,567,890 // 正则实现 const test1 = '1234567890'
const format = test.replace(/\B(?=(\d{3})+(?!\d))/g, ','); console.log(format);
// 1,234,567,890 // 非正则实现 function formatCash(str) {
return str.split('').reverse().reduce((prev, next, index) => {
return ((index % 3) ? next : (next + ',')) + prev
})
} console.log(formatCash('1234567890'));
// 1,234,567,890

refs

https://juejin.im/entry/5998f8396fb9a0247c6ec9cd


xgqfrms 2012-2020

www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!


You Don't Know the Hack tech in the frontend development的更多相关文章

  1. (转) [it-ebooks]电子书列表

    [it-ebooks]电子书列表   [2014]: Learning Objective-C by Developing iPhone Games || Leverage Xcode and Obj ...

  2. Frontend Development

    原文链接: https://github.com/dypsilon/frontend-dev-bookmarks Frontend Development Looking for something ...

  3. RednaxelaFX写的文章/回答的导航帖

    https://www.zhihu.com/people/rednaxelafx/answers http://hllvm.group.iteye.com/group/topic/44381#post ...

  4. 【转】Styling And Animating SVGs With CSS

    原文转自:http://www.smashingmagazine.com/2014/11/03/styling-and-animating-svgs-with-css/?utm_source=CSS- ...

  5. Top JavaScript Frameworks, Libraries & Tools and When to Use Them

    It seems almost every other week there is a new JavaScript library taking the web community by storm ...

  6. GitHub awesome Resource

    各种Awesome技术资源的资源聚合: https://github.com/sindresorhus/awesome Contents Platforms Programming Languages ...

  7. frontend-tools

    收集整理好用的前端开发利器(Collect good front-end development tools ) 1.w3cplus前端工具 2.jsfiddle在线JS代码调试工具 3.w3cfun ...

  8. 所有语言的Awesome(2)

    Curated list of awesome lists https://awesomeweekly.co https://github.com/sindresorhus/awesome ✨ Pre ...

  9. Tech Stuff - Mobile Browser ID (User-Agent) Strings

    Tech Stuff - Mobile Browser ID (User-Agent) Strings The non-mobile stuff is here (hint: you get jerk ...

随机推荐

  1. Connection Pool

    MySQL :: MySQL Connector/NET Developer Guide :: 4.3 Managing a Connection Pool in Connector/NET http ...

  2. Sapphire: Copying GC Without Stopping the World

    https://people.cs.umass.edu/~moss/papers/jgrande-2001-sapphire.pdf Many concurrent garbage collectio ...

  3. Redis-第六章节-事务

    目录 简介 执行过程 特点 案例 watch 简介 事务(Transaction),一般是指要做的或所做的事情.在计算机术语中是指访问并可能更新数据库中各种数据项的一个程序执行单元(unit). 执行 ...

  4. BFS DFS与回溯

    https://blog.csdn.net/u014303647/article/details/88328526 cyc: https://github.com/CyC2018/CS-Notes/b ...

  5. Language Guide (proto3) | proto3 语言指南(十四)选项

    Options - 选项 .proto文件中的单个声明可以使用许多 选项 进行注释.选项不会更改声明的总体含义,但可能会影响在特定上下文中处理声明的方式.可用选项的完整列表在google/protob ...

  6. eclipse 断点调试方法

    1 Debug视图 1.1 线程堆栈视图 线程堆栈视图表示当前线程的堆栈,从中可以看出在运行哪些代码,并且整个调用过程,以及代码行号.分别介绍一下这几个按钮的含义.从左至右分别为: 1.表示当前实现继 ...

  7. AQS简单理解入门---1

    这篇文章,我们来聊聊面试时一个比较有杀伤力的问题:聊聊你对AQS的理解? 之前有同学反馈,去互联网公司面试,面试官聊到并发时就问到了这个问题.当时那位同学内心估计受到了一万点伤害... 因为首先,很多 ...

  8. Java反射开窍--1

    1.通过案例引出反射并体会反射的好处 案例:美团外卖 --->付款 --->要么用微信支付 要么用支付宝支付 package com.zhaoss.test01; //接口的制定方:美团外 ...

  9. idea使用maven的打包工具package不会打上主类解决方法

  10. 小希的迷宫B - B

    上次Gardon的迷宫城堡小希玩了很久(见Problem B),现在她也想设计一个迷宫让Gardon来走.但是她设计迷宫的思路不一样,首先她认为所有的通道都应该是双向连通的,就是说如果有一个通道连通了 ...