把警示窗改为显示在页面右上角，显示几秒后会自动关闭。用鼠标点按窗口会立即关闭，并把内容拷贝到系统剪贴簿。
目前为
// ==UserScript==
// @name elegant alert()
// @name:zh-CN 优雅的 alert()
// @name:zh-TW 優雅的 alert()
// @description Display a non-blocking alert box at the top right corner, and automatically close after a few seconds. Click on the alert box will close it immediately and copy the alert message to clipboard.
// @description:zh-CN 把警示窗改为显示在页面右上角，显示几秒后会自动关闭。用鼠标点按窗口会立即关闭，并把内容拷贝到系统剪贴簿。
// @description:zh-TW 把警示窗改為顯示在頁面右上角，顯示幾秒後會自動關閉。用滑鼠點按窗口會立即關閉，並把內容複製到系統剪貼簿。
// @namespace https://greasyfork.org/zh-TW/users/393133-evan-tseng
// @author Evan Tseng
// @version 1.08
// @include *://*
// @run-at document-start
// @grant none
// ==/UserScript==
(function() {
'use strict';
const boxFont = '400 15pt sans-serif',
boxFontColor = '#000',
boxBgColor = 'rgba(240,240,210,.85)',
boxHoverColor = 'rgba(255,255,255,.85)',
popFontColor = '#8ff',
popBgColor = '#b00',
countdownColor = 'rgba(100,100,240,.2)',
popDuration = 330, // the period of red background
duration = 6400, // message box default lifetime (micro second)
eaCSS = '@media screen and (max-width: 40em) { .elegantAlertBoxWrapper>div { max-width:75vw } }'+
'@media screen and (min-width: 40em) { .elegantAlertBoxWrapper>div { max-width:30em } }'+
'.elegantAlertBoxWrapper { position:fixed; top:8mm; right:12mm; max-height:calc(100vh - 13mm); z-index:2147483647; -webkit-user-select:none; user-select:none; }'+
'.elegantAlertBoxWrapper>div { position:relative; float:right; clear:right; font:'+ boxFont +'; line-height:1.25; color:'+ boxFontColor +'; background:'+ boxBgColor +'; padding:.1em .6em; margin-bottom:1.5mm; overflow:auto; border-radius:.7em; opacity:.2; cursor:pointer; box-shadow:inset 0 0 0 1px rgba(255,255,255,.8), 0 1px 2mm rgba(0,0,0,.7); backdrop-filter:blur(2px); -webkit-backdrop-filter:blur(2px) }'+
'.elegantAlertBoxWrapper .eaBar { position: absolute; left:0; top:0; width:100%; height:100%; background:'+ countdownColor +'; border-radius: 3px }'+
'.elegantAlertBoxWrapper>.pop { opacity:1; max-height:10em; animation: pulse1 '+ popDuration +'ms 1 }'+
'.elegantAlertBoxWrapper>.eaNormal { opacity:1; max-height:10em; }'+
'.elegantAlertBoxWrapper>.eaClose { background:'+ boxBgColor +'; opacity:0; min-height:0; max-height:0; padding-top:0; padding-bottom:0; margin:0; transition:linear .6s; -ms-overflow-style:none; scrollbar-width:none }'+
'.elegantAlertBoxWrapper>.eaClose::-webkit-scrollbar { display:none }'+
'.elegantAlertBoxWrapper>.eaNormal:hover { background:'+ boxHoverColor +'; z-index:2; box-shadow:inset 0 0 0 1px rgba(255,255,255,.8), 0 1px 2mm rgba(0,0,0,.8); animation: pulse2 .16s 1 }'+
'.elegantAlertBoxWrapper>.eaNormal:active { box-shadow:0 0 0 1px #777, inset 0 1px 2px #555; transform:scale(0.97); transition:.1s }'+
'@keyframes pulse1 { 0% { opacity:.7 } 18% { color:' + popFontColor + '; background:' + popBgColor + '; opacity:.9; transform:scale(1.2) } 100% { opacity:1 } }'+
'@keyframes pulse2 { 25% { font-weight:600; left:-2px } 60% { left:1px } }';
var cssElement = document.createElement('style');
if(cssElement.styleSheet) cssElement.styleSheet.cssText = eaCSS;
else cssElement.appendChild(document.createTextNode(eaCSS));
cssElement.setAttribute('title', 'Elegant Alert');
document.querySelector('head').appendChild(cssElement);
var alertWrap = null;
const ElegantAlertBox = function(msg, lifeTime = duration){
if(!alertWrap) {
alertWrap = document.createElement('div');
alertWrap.setAttribute('class', 'elegantAlertBoxWrapper');
document.body.appendChild(alertWrap);
}
this.exist = true;
this.createBox = function(text){
var box = this,
alBox = document.createElement('div');
alertWrap.appendChild(alBox);
alBox.innerHTML = '<div class="eaBar"></div>' + text;
alBox.setAttribute('class', 'pop');
alBox.onclick = function(){
let tmp = document.createElement('textArea');
tmp.value = text;
document.body.appendChild(tmp);
tmp.select();
document.execCommand('copy');
tmp.remove();
box.close();
};
return alBox;
};
this.show = function(){
var box = this;
setTimeout(function(){
box.elm.setAttribute('class', 'eaNormal');
box.elm.querySelector('.eaBar').setAttribute('style', 'width: 0; transition: linear ' + lifeTime + 'ms')
setTimeout(function(){
if(box.exist) box.close();
}, lifeTime);
}, popDuration);
};
this.close = function(){
var box = this;
box.elm.setAttribute('class', 'eaClose');
setTimeout(function(){
if(box.exist) {
box.exist = false;
box.elm.remove();
box.elm = null;
if(!alertWrap.hasChildNodes()) {
alertWrap.remove();
alertWrap = null
}
}
}, 1000);
};
this.elm = this.createBox(msg);
this.show();
};
window.alert = function(message){
if(document.body) new ElegantAlertBox(message);
else setTimeout(function(){ window.alert(message); }, 250);
};
})();