How to realize drop-down refresh in html5

This article will explain in detail how to achieve drop-down refresh in html5. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Home page css+html section:

* {margin: 0; padding: 0; list-style: none;} body {display: flex; justify-content: center; align-items: center;} .one {width: 4rem.height: 7rem.border: 1px solid red; font-size: 0.35rem Box-sizing: border-box; overflow-y: auto;} .kl {position: relative;} .lis {width: 100%; height: 1rem; line-height: 1rem; text-align: center; background: red;} .lis:nth-child (2n+1) {background: pink {height:100%; overflow: auto;-webkit-overflow-scrolling: touch;} .di {position: relative; color: # c8c9cc; font-size: 0; vertical-align: middle;} .k {width: 0.5remr; height: 0.5remr; display: inline-block; max-width: 100%; max-height: 100% Animation: theanimation 1s linear infinite;} .us {position: absolute; top: 0; left: 0; width: 100%; height: 100%; color:rgb (25,137,250)} .us: before {display: block; width: 2px; height: 25%; margin: 0 auto; background-color: currentColor; border-radius: 40%; content:'' }. Us:nth-child (1) {- webkit-transform: rotate (30deg); transform: rotate (30deg); opacity: 1;}. Us:nth-child (2) {- webkit-transform: rotate (60deg); transform: rotate (60deg); opacity: 0.9375;}. Us:nth-child (3) {- webkit-transform: rotate (90deg); transform: rotate (90deg); opacity: 0.875 }. Us:nth-child (4) {- webkit-transform: rotate (120deg); transform: rotate (120deg); opacity: 0.8125;}. Us:nth-child (5) {- webkit-transform: rotate (150deg); transform: rotate (150deg); opacity: 0.75;}. Us:nth-child (6) {- webkit-transform: rotate (180deg); transform: rotate (180deg) Opacity: 0.6875;}. Us:nth-child (7) {- webkit-transform: rotate (210deg); transform: rotate (210deg); opacity: 0.625;}. Us:nth-child (8) {- webkit-transform: rotate (240deg); transform: rotate (240deg); opacity: 0.5625;}. Us:nth-child (9) {- webkit-transform: rotate (270deg) Transform: rotate (270deg); opacity: 0.5;}. Us:nth-child (10) {- webkit-transform: rotate (300deg); transform: rotate (300deg); opacity: 0.4375;} .us:nth-child (11) {- webkit-transform: rotate (330deg); transform: rotate (330deg); opacity: 0.375 }. Us:nth-child (12) {- webkit-transform: rotate (360deg); transform: rotate (360deg); opacity: 0.3125;} @ keyframes theanimation {from {transform: rotate (0deg);} to {transform: rotate (360deg) }} drop-down refresh this is a content This is a content.

Here is a simulation of a simple drop-down refresh template.

Then there is the js section and the most important part:

Window.loading = function () {var sin = 0; var sel = null; / / timer var br = true; / / determine whether all the numbers are calculated based on var bl = true; / / determine whether ios an var all_H; / / pull-down height var xl_xu, sl_xu; / / drop-down and pull-up var str Let box = document.getElementsByClassName ('one') [0] / / fetch the entire body let box_childer = document.getElementsByClassName (' kl') [0] let li = document.querySelectorAll ('li') / / all li box.addEventListener (' touchstart', start) / / press event box.addEventListener ('scroll', (e) = > scrol (e)) / / Mobile event box.addEventListener (' touchend') End) / / Press the exit event / / box.addEventListener ('touchmove',move_lin) / / drag event function scrol (e) {/ / activity event let move_scroll = br & & bl? E.target.scrollTop: NaN all_H = box.clientHeight + move_scroll if (all_H > = e.target.scrollHeight) {/ / bl = false if (sin ^ 3) {+ + sin} else {if (xl_xu) {return} Establish (2) return false} br = false / / create a server to display the content establish () } function end () {/ / Mouse opening event bl = true} function start (e) {/ / press event bl = true} function establish (a = 0) {/ / add dom plus if (a = 2) {/ / indicate that it is the last xl_xu = document.createElement ('div') Xl_xu.style.textAlign = 'center' xl_ Xu [XSS _ clean] =' box_childer.appendChild (xl_xu) return} if (xl_xu) {/ / delete box_childer.removeChild (xl_xu)} xl_ first Xu = document.createElement ('div') xl_xu.style.textAlign =' center' xl_ Xu [XSS _ clean] = str box_childer.appendChild (xl_xu) sel = setTimeout (() = > {box_childer.removeChild (xl_xu) xl_xu = null clearTimeout (sel) Let a = Array.from ({length: 5}, _ = > document.createElement ('li')) for (let I = 0