上篇文章給大家介紹了JS實現簡單抖動效果，感興趣的朋友點擊查看。
今天給大家分享JS相冊圖片抖動放大展示效果，效果圖如下所示：
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var xm;var ym; /* ==== onmousemove event ==== */document.onmousemove = function(e){ if(window.event) e=window.event; xm = (e.x || e.clientX); ym = (e.y || e.clientY);} /* ==== window resize ==== */function resize() { if(diapo)diapo.resize();}onresize = resize; /* ==== opacity ==== */setOpacity = function(o, alpha){ if(o.filters)o.filters.alpha.opacity = alpha * 100; else o.style.opacity = alpha;} /* ===== encapsulate script ==== */diapo = { O : [], DC : 0, img : 0, txt : 0, N : 0, xm : 0, ym : 0, nx : 0, ny : 0, nw : 0, nh : 0, rs : 0, rsB : 0, zo : 0, tx_pos : 0, tx_var : 0, tx_target : 0, /// script parameters attraction : 2, acceleration : .9, dampening : .1, zoomOver : 2, zoomClick : 6, transparency : .8, font_size: 18, // /* ==== diapo resize ==== */ resize : function(){ with(this){ nx = DC.offsetLeft; ny = DC.offsetTop; nw = DC.offsetWidth; nh = DC.offsetHeight; txt.style.fontSize = Math.round(nh / font_size) + "px"; if(Math.abs(rs-rsB)<100) for(var i=0; i<N; i++) O[i].resize(); rsB = rs; } }, /* ==== create diapo ==== */ CDiapo : function(o){ /* ==== init variables ==== */ this.o = o; this.x_pos = this.y_pos = 0; this.x_origin = this.y_origin = 0; this.x_var = this.y_var = 0; this.x_target = this.y_target = 0; this.w_pos = this.h_pos = 0; this.w_origin = this.h_origin = 0; this.w_var = this.h_var = 0; this.w_target = this.h_target = 0; this.over = false; this.click = false; /* ==== create shadow ==== */ this.spa = document.createElement("span"); this.spa.className = "spaDC"; diapo.DC.appendChild(this.spa); /* ==== create thumbnail image ==== */ this.img = document.createElement("img"); this.img.className = "imgDC"; this.img.src = o.src; this.img.O = this; diapo.DC.appendChild(this.img); setOpacity(this.img, diapo.transparency); /* ==== mouse events ==== */ this.img.onselectstart = new Function("return false;"); this.img.ondrag = new Function("return false;"); this.img.onmouseover = function(){ diapo.tx_target=0; diapo.txt.innerHTML=this.O.o.alt; this.O.over=true; setOpacity(this,this.O.click?diapo.transparency:1); } this.img.onmouseout = function(){ diapo.tx_target=-diapo.nw; this.O.over=false; setOpacity(this,diapo.transparency); } this.img.onclick = function() { if(!this.O.click){ if(diapo.zo && diapo.zo != this) diapo.zo.onclick(); this.O.click = true; this.O.x_origin = (diapo.nw - (this.O.w_origin * diapo.zoomClick)) / 2; this.O.y_origin = (diapo.nh - (this.O.h_origin * diapo.zoomClick)) / 2; diapo.zo = this; setOpacity(this,diapo.transparency); } else { this.O.click = false; this.O.over = false; this.O.resize(); diapo.zo = 0; } } /* ==== rearrange thumbnails based on "imgsrc" images position ==== */ this.resize = function (){ with (this) { x_origin = o.offsetLeft; y_origin = o.offsetTop; w_origin = o.offsetWidth; h_origin = o.offsetHeight; } } /* ==== animation function ==== */ this.position = function (){ with (this) { /* ==== set target position ==== */ w_target = w_origin; h_target = h_origin; if(over){ /* ==== mouse over ==== */ w_target = w_origin * diapo.zoomOver; h_target = h_origin * diapo.zoomOver; x_target = diapo.xm - w_pos / 2 - (diapo.xm - (x_origin + w_pos / 2)) / (diapo.attraction*(click?10:1)); y_target = diapo.ym - h_pos / 2 - (diapo.ym - (y_origin + h_pos / 2)) / (diapo.attraction*(click?10:1)); } else { /* ==== mouse out ==== */ x_target = x_origin; y_target = y_origin; } if(click){ /* ==== clicked ==== */ w_target = w_origin * diapo.zoomClick; h_target = h_origin * diapo.zoomClick; } /* ==== magic spring equations ==== */ x_pos += x_var = x_var * diapo.acceleration + (x_target - x_pos) * diapo.dampening; y_pos += y_var = y_var * diapo.acceleration + (y_target - y_pos) * diapo.dampening; w_pos += w_var = w_var * (diapo.acceleration * .5) + (w_target - w_pos) * (diapo.dampening * .5); h_pos += h_var = h_var * (diapo.acceleration * .5) + (h_target - h_pos) * (diapo.dampening * .5); diapo.rs += (Math.abs(x_var) + Math.abs(y_var)); /* ==== html animation ==== */ with(img.style){ left = Math.round(x_pos) + "px"; top = Math.round(y_pos) + "px"; width = Math.round(Math.max(0, w_pos)) + "px"; height = Math.round(Math.max(0, h_pos)) + "px"; zIndex = Math.round(w_pos); } with(spa.style){ left = Math.round(x_pos + w_pos * .1) + "px"; top = Math.round(y_pos + h_pos * .1) + "px"; width = Math.round(Math.max(0, w_pos * 1.1)) + "px"; height = Math.round(Math.max(0, h_pos * 1.1)) + "px"; zIndex = Math.round(w_pos); } } } }, /* ==== main loop ==== */ run : function(){ diapo.xm = xm - diapo.nx; diapo.ym = ym - diapo.ny; /* ==== caption anim ==== */ diapo.tx_pos += diapo.tx_var = diapo.tx_var * .9 + (diapo.tx_target - diapo.tx_pos) * .02; diapo.txt.style.left = Math.round(diapo.tx_pos) + "px"; /* ==== images anim ==== */ for(var i in diapo.O) diapo.O[i].position(); /* ==== loop ==== */ setTimeout("diapo.run();", 16); }, /* ==== load images ==== */ images_load : function(){ // ===== loop until all images are loaded ===== var M = 0; for(var i=0; i<diapo.N; i++) { if(diapo.img[i].complete) { diapo.img[i].style.position = "relative"; diapo.O[i].img.style.visibility = "visible"; diapo.O[i].spa.style.visibility = "visible"; M++; } resize(); } if(M<diapo.N) setTimeout("diapo.images_load();", 128); }, /* ==== init script ==== */ init : function() { diapo.DC = document.getElementById("diapoContainer"); diapo.img = diapo.DC.getElementsByTagName("img"); diapo.txt = document.getElementById("caption"); diapo.N = diapo.img.length; for(i=0; i<diapo.N; i++) diapo.O.push(new diapo.CDiapo(diapo.img[i])); diapo.resize(); diapo.tx_pos = -diapo.nw; diapo.tx_target = -diapo.nw; diapo.images_load(); diapo.run(); }} /* ==== start script ==== */function dom_onload() { if(document.getElementById("diapoContainer")) diapo.init(); else setTimeout("dom_onload();", 128);}dom_onload(); |
到此這篇關于JS相冊圖片抖動放大展示效果的示例代碼的文章就介紹到這了,更多相關js圖片放大抖動內容請搜索服務器之家以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持服務器之家！
原文鏈接：https://blog.csdn.net/weixin_33963189/article/details/91988807
