倒计时:
在倒计时不超过一天的代码
var hour = document.querySelector(".hour"); var minute = document.querySelector(".minute"); var second = document.querySelector(".second"); //截止的时间 var inputTime = +new Date("2023-4-08 20:00:00 "); //我们先调用countDown函数,可以避免在打开界面后停一秒后才开始倒计时 countDown(); setInterval(countDown, 1000);function countDown() { var nowTime = +new Date(); var times = (inputTime - nowTime) / 1000; var h = parseInt((times / 60 / 60) % 24); var m = parseInt((times / 60) % 60); var s = parseInt(times % 60); hour.innerHTML = h < 10 ? "0" + h : h; minute.innerHTML = m < 10 ? "0" + m : m; second.innerHTML = s < 10 ? "0" + s : s; } 天数的那种: var day=document.querySelector(".day") var hour = document.querySelector(".hour"); var minute = document.querySelector(".minute"); var second = document.querySelector(".second"); //截止的时间 var inputTime = +new Date("2023-4-08 20:00:00 "); //我们先调用countDown函数,可以避免在打开界面后停一秒后才开始倒计时 countDown(); setInterval(countDown, 1000);
function countDown() { var nowTime = +new Date(); var times = (inputTime - nowTime) / 1000; var h=parseInt(times/60/60/24) var h = parseInt((times / 60 / 60) % 24); var m = parseInt((times / 60) % 60); var s = parseInt(times % 60); hour.innerHTML = h < 10 ? "0" + h : h; minute.innerHTML = m < 10 ? "0" + m : m; second.innerHTML = s < 10 ? "0" + s : s; day.innerHTML = d < 10 ? "0" + d : d; } 取url
const url = "https://www.baidu.com/m?f=8&ie=utf-8&rsv_bp=1&tn=monline_3_dg&wd=session"; function queryURLparams(url){ let obj = {}; if (url.indexOf("?") < 0) return obj; let arr = url.split("?"); let urlcopy = arr[1]; let array = urlcopy.split("&"); for (var i = 0; i < array.length; i++) { let arr2 = array[i]; let arr3 = arr2.split("="); obj[arr3[0]] = arr3[1]; } return obj }
- 正则匹配规则
/([^?=&]+)=([^?=&]+)/g
- 利用replace替换
- 用伪数组进行键值对拼接
es6的 …arg
其实和arguments差不多 ,就是arguments是伪数组,…arg是真数组
function queryURLparamsRegEs6(url) {
let obj = {}
let reg = /([^?=&]+)=([^?=&]+)/g
url.replace(reg, (...arg) => {
obj[arg[1]] = arg[2]
})
return obj
}