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js原生輪播圖,支援移動端

window.onload = function(){ var container = document.getElementById('container'); var list = document.getElementById('list'); var buttons = document.getElementById('buttons'); var buttonsItem = buttons.getElementsByTagName('span'); var prev = document.getElementById('prev'
); var next = document.getElementById('next'); var index = 0; var startX = 0; var endX = 0; container.addEventListener('touchend',function(event){ if(event.changedTouches.length==1&&this.getAttribute('disabled')!='disabled'){ var touch = event.changedTouches[0
]; endX = touch.pageX; var offset = endX-startX; console.log(offset); if(Math.abs(offset)>=50){ if(offset<0){// 右滑 nextMethod(); }else{ prevMethod(); } } } }); container.addEventListener('touchmove'
,function(){ event.preventDefault(); }) container.addEventListener('touchstart',function(event){ if(event.targetTouches.length==1&&this.getAttribute('disabled')!='disabled'){ var touch = event.targetTouches[0]; startX = touch.pageX; } }) prev.addEventListener('click',function(){ if (this.getAttribute('disabled')=='disabled') { return false; } prevMethod(); }); next.addEventListener('click',function(){ if (this.getAttribute('disabled')=='disabled') { return false; } nextMethod(); }); for(var i=0;i<buttonsItem.length;i++){ buttonsItem[i].onclick = function(){ if (this.getAttribute('disabled')=='disabled') { return false; } var i = this.getAttribute('index'); var length = Math.abs((i-index)*500); var direction = 'right'; if (length<0) { direction = 'left'; } index = i; document.getElementsByClassName('on')[0].setAttribute('class',''); buttonsItem[index].className = 'on'; animate(direction,1,length); } } function prevMethod(){ if(index==0){ index = 4; animate('right',40,2000); }else{ index--; animate('left',1,500); } document.getElementsByClassName('on')[0].setAttribute('class',''); // buttonsItem[index].setAttribute('class','on'); buttonsItem[index].className = 'on'; } function nextMethod(){ if(index==4){ index = 0; animate('left',40,2000); }else{ index++; animate('right',1,500); } document.getElementsByClassName('on')[0].setAttribute('class',''); buttonsItem[index].className = 'on'; } function animate(direction,speed,length){ var end = length/speed; var count = 0; for(var i=0;i<end;i++){ setTimeout(function(){ count++; var left = list.offsetLeft; if (direction=='right') { left -= speed; }else{ left += speed; } list.style.left = left+'px'; if(count<end-1){ disabledButtons(); }else{ resumeButtons(); } },speed*i); } } function disabledButtons(){ for(var i=0;i<5;i++){ buttonsItem[i].setAttribute('disabled','disabled'); } prev.setAttribute('disabled','disabled'); next.setAttribute('disabled','disabled'); container.setAttribute('disabled','disabled'); } function resumeButtons(){ for(var i=0;i<5;i++){ buttonsItem[i].removeAttribute('disabled'); } prev.removeAttribute('disabled'); next.removeAttribute('disabled'); container.removeAttribute('disabled'); } }