想要學會這個漂亮的煙花嗎？快來跟著學習吧~
結構
<div class="container"></div>
我們只需要一個盒子表示煙花爆炸范圍就可以了
樣式
fire是煙花 注意添加絕對定位
<style>
.container{
margin: 0 auto;
height: 500px;
width: 1200px;
background: black;
position: relative;
overflow: hidden;
}
.fire{
width: 10px;
background: white;
height: 10px;
/* border-radius: 50%; */
position: absolute;
bottom: 0;
}
</style>
行為
編寫構造函數Firework
需要用到一個鼠標點擊的位置，一個div選擇器，一個爆炸樣式
function Firework(x,y,selector,type){
//此處獲取對象的方式為單例的思想，避免重復獲取相同的元素
if(Firework.box && selector === Firework.box.selector){
this.box = Firework.box.ele;
}else{
Firework.box = {
ele:document.querySelector(selector),
selector:selector
}
this.box = Firework.box.ele;
}
this.type = type;
this.init(x,y)
}
封裝一個運動的方法
function animation(ele,attroptions,callback){
for(var attr in attroptions){
attroptions[attr] ={
target:attroptions[attr],
inow:parseInt(getComputedStyle(ele)[attr])
}
}
clearInterval(ele.timer);
ele.timer = setInterval(function(){
for(var attr in attroptions ){
var item = attroptions[attr]
var target = item.target;
var inow = item.inow;
var speed = (target - inow)/10;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
if(Math.abs(target - inow) <= Math.abs(speed)){
ele.style[attr] = target+"px";
delete attroptions[attr];
for(var num in attroptions){
return false;
}
clearTimeout(ele.timer);
if(typeof callback === "function")callback();
}else{
attroptions[attr].inow += speed;
ele.style[attr] = attroptions[attr].inow+"px";
}
}
},30)
}
編寫原型方法
Firework.prototype = {
constructor:Firework,
//初始化
init:function(x,y){
//創建一個煙花
this.ele = this.createFirework();
//xy為鼠標落點
this.x = x ;
this.y = y;
//maxXy為最大運動范圍
this.maxX = this.box.offsetWidth - this.ele.offsetWidth;
this.maxY = this.box.offsetHeight - this.ele.offsetHeight;
//初始化結束后 煙花隨機顏色
this.randomColor(this.ele);
//煙花升空
this.fireworkUp(this.ele);
},
//創造煙花
createFirework:function(){
var ele = document.createElement("div");
ele.className = "fire";
this.box.appendChild(ele);
return ele;
},
//煙花升空
fireworkUp:function(ele){
ele.style.left = this.x + "px";
//此處用到剛剛封裝的運動方法
animation(ele,{top:this.y},function(){
ele.remove();
this.fireworkBlast()
}.bind(this));
},
//煙花爆炸
fireworkBlast:function(){
for(var i = 0 ; i < 20; i++){
var ele = document.createElement("div");
ele.className = "fire";
ele.style.left = this.x + "px";
ele.style.top = this.y + "px";
this.box.appendChild(ele);
ele.style.borderRadius = "50%";
this.randomColor(ele);
//判定一下輸入的爆炸方式是原型煙花 還是散落煙花 由此更改獲取的煙花位置
animation(ele,this.type === "circle"?this.circleBlast(i,20): this.randomPosition(),function(cale){
cale.remove();
}.bind(this,ele))
}
},
//圓形爆炸位置
circleBlast:function(i,total){
var r = 200;
var reg = 360 / total *i;
var deg = Math.PI / 180 *reg;
return {
left:r * Math.cos(deg) + this.x ,
top:r * Math.sin(deg) + this.y
}
},
//隨機顏色
randomPosition:function(){
return {
left : Math.random()*this.maxX,
top : Math.random()*this.maxY
}
},
randomColor:function(ele){
var color = "#" + parseInt(parseInt("ffffff",16)*Math.random()).toString(16).padStart(6,0);
return ele.style.backgroundColor = color;
}
}
綁定事件
document.querySelector(".container").addEventListener("click",function(evt){
var e = evt||event;
new Firework(e.offsetX,e.offsetY,".container","circle")
new Firework(e.offsetX,e.offsetY,".container")
})
全部代碼
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.container{
margin: 0 auto;
height: 500px;
width: 1200px;
background: black;
position: relative;
overflow: hidden;
}
.fire{
width: 10px;
background: white;
height: 10px;
/* border-radius: 50%; */
position: absolute;
bottom: 0;
}
</style>
</head>
<body>
<div class="container"></div>
<script src="./utils.js"></script>
<script>
function animation(ele,attroptions,callback){
for(var attr in attroptions){
attroptions[attr] ={
target:attroptions[attr],
inow:parseInt(getComputedStyle(ele)[attr])
}
}
clearInterval(ele.timer);
ele.timer = setInterval(function(){
for(var attr in attroptions ){
var item = attroptions[attr]
var target = item.target;
var inow = item.inow;
var speed = (target - inow)/10;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
if(Math.abs(target - inow) <= Math.abs(speed)){
ele.style[attr] = target+"px";
delete attroptions[attr];
for(var num in attroptions){
return false;
}
clearTimeout(ele.timer);
if(typeof callback === "function")callback();
}else{
attroptions[attr].inow += speed;
ele.style[attr] = attroptions[attr].inow+"px";
}
}
},30)
}
function Firework(x,y,selector,type){
if(Firework.box && selector === Firework.box.selector){
this.box = Firework.box.ele;
}else{
Firework.box = {
ele:document.querySelector(selector),
selector:selector
}
this.box = Firework.box.ele;
}
this.type = type;
this.init(x,y)
}
Firework.prototype = {
constructor:Firework,
//初始化
init:function(x,y){
this.ele = this.createFirework();
this.x = x ;
this.y = y;
this.maxX = this.box.offsetWidth - this.ele.offsetWidth;
this.maxY = this.box.offsetHeight - this.ele.offsetHeight;
this.randomColor(this.ele);
this.fireworkUp(this.ele);
},
//創造煙花
createFirework:function(){
var ele = document.createElement("div");
ele.className = "fire";
this.box.appendChild(ele);
return ele;
},
fireworkUp:function(ele){
ele.style.left = this.x + "px";
animation(ele,{top:this.y},function(){
ele.remove();
this.fireworkBlast()
}.bind(this));
},
//煙花爆炸
fireworkBlast:function(){
for(var i = 0 ; i < 20; i++){
var ele = document.createElement("div");
ele.className = "fire";
ele.style.left = this.x + "px";
ele.style.top = this.y + "px";
this.box.appendChild(ele);
ele.style.borderRadius = "50%";
this.randomColor(ele);
animation(ele,this.type === "circle"?this.circleBlast(i,20): this.randomPosition(),function(cale){
cale.remove();
}.bind(this,ele))
}
},
circleBlast:function(i,total){
var r = 200;
var reg = 360 / total *i;
var deg = Math.PI / 180 *reg;
return {
left:r * Math.cos(deg) + this.x ,
top:r * Math.sin(deg) + this.y
}
},
randomPosition:function(){
return {
left : Math.random()*this.maxX,
top : Math.random()*this.maxY
}
},
randomColor:function(ele){
var color = "#" + parseInt(parseInt("ffffff",16)*Math.random()).toString(16).padStart(6,0);
return ele.style.backgroundColor = color;
}
}
document.querySelector(".container").addEventListener("click",function(evt){
var e = evt||event;
new Firework(e.offsetX,e.offsetY,".container","circle")
new Firework(e.offsetX,e.offsetY,".container")
})
</script>
</body>
</html>
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版權聲明：本文為CSDN博主「SpongeBooob」的原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/qq_41383900/article/details/105026768
