常用的JavaScript代码技巧（一）

　　作为一名前端程序员需要了解一些常用的JavaScript代码技巧，这样可以提高代码效率，我们就来看看具体的内容吧。
　　字符串类
　　1.比较时间const time1 = ＂2022-03-05 10:00:00＂; const time2 = ＂2022-03-05 10:00:01＂; const overtime = time1 < time2; // overtime => true
　　2.货币格式const ThousandNum = num => num.toString().replace(/B(?=(d{3})+(?!d))/g, ＂,＂); const cash = ThousandNum(100000000); // cash => 100,000,000
　　3.随机密码const Randompass = len => Math.random().toString(36).substr(3, len); const pass = RandomId(8); // pass => ＂7nf6tgru＂
　　4.随机HEX颜色值const RandomColor = () => ＂#＂ + Math.floor(Math.random() * 0xffffff).toString(16).padEnd(6, ＂0＂); const color = RandomColor(); // color => ＂##26330b＂
　　5.评价星星const StartScore = rate => ＂ ＂.slice(5 - rate, 10 - rate); const start = StartScore(4); // start =>
　　6.获得URL参数const url = new URL(＂https://example.com?name=tom&sex=male＂); const params = new URLSearchParams(url.search.replace(/?/ig, ＂＂)); params.has(＂sex＂); // true params.get(＂sex＂); // ＂male＂
　　数字类数字处理，替代Math.floor() 和 Math.ceil()const n1 = ~~ 1.19; const n2 = 2.29 | 0; const n3 = 3.39 >> 0; // n1 n2 n3 => 1 2 3
　　2.补零const FillZero = (num, len) => num.toString().padStart(len, ＂0＂); const num = FillZero(123, 5); // num => ＂00123＂
　　3.转换成数值const num1 = +null; const num2 = +＂＂; const num3 = +false; const num4 = +＂59＂; // num1 num2 num3 num4 => 0 0 0 59
　　4.时间戳const timestamp = +new Date(＂2022-03-07＂); // timestamp => 1646611200000
　　5.小数const RoundNum = (num, decimal) => Math.round(num * 10 ** decimal) / 10 ** decimal; const num = RoundNum(1.2345, 2); // num => 1.23
　　6.奇偶校验 const YEven = num => !!(num & 1) ? ＂no＂ : ＂yes＂; const num = YEven(1); // num => ＂no＂ const num = YEven(2); // num => ＂yes＂
　　7.获得最小值最大值 const arr = [0, 1, 2, 3]; const min = Math.min(...arr); const max = Math.max(...arr); // min max => 0 3
　　8.生成范围随机数 const RandomNum = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min; const num = RandomNum(1, 10); // 6 每次运行可能不一样
　　待续................