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
function queryURLparamsReg(url)
{
let obj={}
let reg=/([^?=&]+)=([^?=&]+)/g
url.replace(reg,function()
{
obj[arguments[1]]=arguments[2]
})
return obj
}
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
}