本文實例為大家分享了圖片緩慢放大縮小js實現代碼，供大家參考，具體內容如下
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>圖片的緩慢縮放</title></head><script> window.onload = function(){ var btn_big = document.getElementById("big"); var btn_small = document.getElementById("small"); var pic = document.getElementById("pic"); //緩慢放大btn_big.onclick = function(){ var width = parseInt(pic.style.width); var i = width; var count = 0; console.log(width); var timer = setInterval(function(){ count++; i++; pic.style.width = i + "%"; if(count == 10 ){ clearInterval(timer); }else if( i > 50){ btn_big.onclick = function(e){ btn_big.onclick = null; }; } },13); }; //緩慢縮小btn_small.onclick = function(){ var width = parseInt(pic.style.width); var count = 0; if(width == 10){ alert("圖片已最小!!"); return false; } console.log(width); var timer2 = setInterval(function(){ count++; width--; pic.style.width = width +"%"; if(count == 10){ clearInterval(timer2); }else if( width < 10){ btn_small.onclick = null; } },13); } }</script><style> #pic{ width: 20%; }</style><body> <div id="pic"> <img src="3.pic.jpg"> </div> <div> <button id="big">放大</button> <button id="small">縮小</button> </div></body></html>以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。