作者 | megatron
炼金 | juejin.im/post/5cc55eb5e51d456e577f93f0
单行简洁的代码很难维护(有时甚至难以理解),但这并不能阻止广大攻城狮们脑洞,在编写简洁的代码后获得一定的满足感。
以下我最近的一些收藏 javascript
精简代码集合。它们都可以在你的开发控制台中运行,你可以从控制台中查看运行结果。同时,我希望你能在评论中分享一些自己的藏品!
日历
创建过去七天的数组,如果将代码中的减号换成加号,你将得到未来7天的数组集合
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
[...Array(7).keys()].map(days =>newDate(Date.now()-86400000* days));
</pre>
生成随机ID
在原型设计时经常使用的创建ID功能。但是我在实际项目中看到有人使用它。其实这并不安全
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
Math.random().toString(36).substring(2);
</pre>
获取URL的查询参数
这个获取URL的查询参数代码,是我见过最精简的 QAQ``?foo=bar&baz=bing => {foo: bar, baz: bing}
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
q={};location.search.replace(/([^?&=]+)=([^&]+)/g,(_,k,v)=>q[k]=v);q;
</pre>
本地时间
通过一堆HTML,您可以创建一个本地时间,其中包含您可以一口气读出的源代码,它每秒都会用当前时间更新页面
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
<bodyonload="setInterval(()=>document.body.innerHTML=new Date().toLocaleString().slice(10,19))"></body>
</pre>
数组混淆
随机更改数组元素顺序,混淆数组
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
(arr)=> arr.slice().sort(()=>Math.random()-0.5)
</pre>
生成随机十六进制代码(生成随机颜色)
使用JavaScript简洁代码生成随机十六进制代码
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
'#'+Math.floor(Math.random()*0xffffff).toString(16).padEnd(6,'0');
</pre>
一个面试题
这是一个臭名昭著的面试题,让你写出他的运行结果,受不了~
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
for(i=0;++i<101;console.log(i%5?f||i:f+'Buzz'))f=i%3?'':'Fizz'
</pre>
数组去重
这是一个原生的JS函数但是非常简洁,Set接受任何可迭代对象,如数组[1,2,3,3],并删除重复项
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
[...newSet(arr)]
</pre>
创建特定大小的数组
方便快捷创建特定大小的数组
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
[...Array(3).keys()]
</pre>
返回一个键盘(惊呆了)
这是一个很难看懂的简洁代码,但是运行后你会惊呆的,他竟然返回一个图形键盘
<pre class="" style="margin: 0px 0px 15px; padding: 15px 5px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.544px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; background-color: rgb(246, 248, 250); font-size: 13px; line-height: 1.5; overflow: auto; border-radius: 3px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; color: rgb(0, 0, 0); text-align: start;">
-
(_=>[..."
1234567890-=QWERTYUIOP[]~ASDFGHJKL;'ZXCVBNM,./~"].map(x=>(o+=/${b='_'.repeat(w=x<y?2:' 667699'[x=["BS","TAB","CAPS","ENTER"][p++]||'SHIFT',p])}\|
,m+=y+(x+' ').slice(0,w)+y+y,n+=y+b+y+y,l+=' __'+b)[73]&&(k.push(l,m,n,o),l='',m=n=o=y),m=n=o=y='|',p=l=k=[])&&k.join`` -
``)()`
</pre>
这是它的打印结果:
image
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