String Skill

字符串相关的JS技巧。

时间大小对比

时间的个位必须补足0才能对比

const time1 = '2019-02-14 21:00:00';
const time2 = '2019-05-01 09:00:00';
const overtime = time1 > time2; // overtime => false

格式化金钱

const ThousandNum = num => num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
const money = ThousandNum(20190214); // money => '20,190,214'

生成随机ID

const RandomId = len => Math.random().toString(36).substr(3, len);
const id = RandomId(10); // id => nh365yoj39

生成随机HEX色值

const RandomColor = () => '#' + Math.floor(Math.random() * 0xffffff).toString(16).padEnd(6, '0');
const color = RandomColor(); // color => "#f03665"

生成星级评分

const StartScore = rate => '★★★★★☆☆☆☆☆'.slice(5 - rate, 10 - rate);
const start = StartScore(1); // start => '★☆☆☆☆'

操作URL查询参数

具体方法:URLSearchParams (opens new window)

const params = new URLSearchParams(location.search.replace(/\?/ig, ""));
params.get('id');
params.has('test');