2020-3-23 前端達(dá)人
想要學(xué)會(huì)這個(gè)漂亮的煙花嗎?快來(lái)跟著學(xué)習(xí)吧~
我們只需要一個(gè)盒子表示煙花爆炸范圍就可以了
fire是煙花 注意添加絕對(duì)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>
需要用到一個(gè)鼠標(biāo)點(diǎn)擊的位置,一個(gè)div選擇器,一個(gè)爆炸樣式
function Firework(x,y,selector,type){ //此處獲取對(duì)象的方式為單例的思想,避免重復(fù)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) }
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) }
Firework.prototype = { constructor:Firework, //初始化 init:function(x,y){ //創(chuàng)建一個(gè)煙花 this.ele = this.createFirework(); //xy為鼠標(biāo)落點(diǎn) this.x = x ; this.y = y; //maxXy為最大運(yùn)動(dòng)范圍 this.maxX = this.box.offsetWidth - this.ele.offsetWidth; this.maxY = this.box.offsetHeight - this.ele.offsetHeight; //初始化結(jié)束后 煙花隨機(jī)顏色 this.randomColor(this.ele); //煙花升空 this.fireworkUp(this.ele); }, //創(chuàng)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(yùn)動(dòng)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(jī)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; } }
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(chuàng)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>
———————————————— 版權(quán)聲明:本文為CSDN博主「SpongeBooob」的原創(chuàng)文章,遵循 CC 4.0 BY-SA 版權(quán)協(xié)議,轉(zhuǎn)載請(qǐng)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
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