[javascript] js获取当天0点和24点的时间戳

let startTime1 = new Date(new Date().toLocaleDateString()).getTime()/1000; // 当天0点
let endTime1 = (new Date(new Date().toLocaleDateString()).getTime() +24 * 60 * 60 * 1000 -1)/1000;// 当天23:59