js 源码：
Object.prototype.fadeIn = function(time, callback) {
var el = this;
el.style.opacity = 0;
var st = setInterval(function() {
el.style.opacity = parseFloat(el.style.opacity) + 0.01;
if (el.style.opacity >= 1) {
clearInterval(st);
if (callback !== undefined) {
callback();
}
}
}, time);
return this;
}
Object.prototype.fadeOut = function(time, callback) {
var el = this;
el.style.opacity = 1;
var st = setInterval(function() {
el.style.opacity = parseFloat(el.style.opacity) - 0.01;
if (el.style.opacity <= 0) {
clearInterval(st);
if (callback !== undefined) {
callback();
}
}
}, time);
return this;
}
window.onload = function() {
var el = document.querySelector(".spinner");
el.fadeOut(50, function() {
el.fadeIn(50, function() {
console.log("finished");
});
});
}
示例：
Document.spinner {
width: 60px;
height: 60px;
position: relative;
margin: 100px auto;
}
.double-bounce-outer, .double-bounce-inner {
width: 100%;
height: 100%;
border-radius: 50%;
background-color: #67CF22;
opacity: 0.6;
position: absolute;
top: 0px;
left: 0px;
-webkit-animation: bounce 2.0s infinite ease-in-out;
animation: bounce 2.0s infinite ease-in-out;
}
.double-bounce-inner {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}
@keyframes bounce {
0%, 100% {
transform: scale(0.0);
} 50% {
transform: scale(1.0);
}
}
@-webkit-keyframes bounce {
0%, 100% {
-webkit-transform: scale(0.0);
} 50% {
-webkit-transform: scale(1.0);
}
}
Object.prototype.fadeIn = function(time, callback) {
var el = this;
el.style.opacity = 0;
var st = setInterval(function() {
el.style.opacity = parseFloat(el.style.opacity) + 0.02;
if (el.style.opacity >= 1) {
clearInterval(st);
if (callback !== undefined) {
callback();
}
}
}, time);
return this;
}
Object.prototype.fadeOut = function(time, callback) {
var el = this;
el.style.opacity = 1;
var st = setInterval(function() {
el.style.opacity = parseFloat(el.style.opacity) - 0.02;
if (el.style.opacity <= 0) {
clearInterval(st);
if (callback !== undefined) {
callback();
}
}
}, time);
return this;
}
window.onload = function() {
var el = document.querySelector(".spinner");
el.fadeOut(20, function() {
el.fadeIn(20, function() {
console.log("finished");
});
});
}
复制粘贴保存打开见效果......
2024-04-07 16:29:48【出处】：https://blog.csdn.net/weixin_29912207/article/details/115020984
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标签：opacity,el,style,function,fadeOut,javascript,JS,callback,var From： https://www.cnblogs.com/mq0036/p/18119348