標籤:com bsp highlight seo 總結 java ges dom img
1、代碼(mouseover)
<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title><style type="text/css">.div1{width: 600px;height: 600px;background: red;}div{padding: 20px;}div div{background-color: white;}div div div{background-color: blue;}</style></head><body><div class="div1" id = ‘div1‘><div><div></div></div></div><script>var div1 = document.getElementById("div1");div1.addEventListener("mouseover",function(){ var r = parseInt(Math.random()*255); var g = parseInt(Math.random()*255); var b = parseInt(Math.random()*255); var s = "background:rgb("+r+","+g+","+b+")"; console.log(s); div1.style = s; })</script></body></html>
2、效果(mouseover)
3、總結
mouseover會給子節點也綁定事件,傳說中的冒泡事件,所以出現滑鼠移動過程中觸發三次事件
1、代碼(mouseenter)
<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title><style type="text/css">.div1{width: 600px;height: 600px;background: red;}div{padding: 20px;}div div{background-color: white;}div div div{background-color: blue;}</style></head><body><div class="div1" id = ‘div1‘><div><div></div></div></div><script>var div1 = document.getElementById("div1");div1.addEventListener("mouseenter",function(){ var r = parseInt(Math.random()*255); var g = parseInt(Math.random()*255); var b = parseInt(Math.random()*255); var s = "background:rgb("+r+","+g+","+b+")"; console.log(s); div1.style = s; })</script></body></html><!--<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title><style type="text/css">.div1{width: 600px;height: 600px;background: red;}div{padding: 20px;}div div{background-color: white;}div div div{background-color: blue;}</style></head><body><div class="div1" id = ‘div1‘><div><div></div></div></div><script>var div1 = document.getElementById("div1");div1.addEventListener("mouseover",function(){ var r = parseInt(Math.random()*255); var g = parseInt(Math.random()*255); var b = parseInt(Math.random()*255); var s = "background:rgb("+r+","+g+","+b+")"; console.log(s); div1.style = s; })</script></body></html>-->
2、效果(mouseenter)
3、總結
mouseenter不是給子節點也綁定事件,也就是說,事件沒有冒泡,所以在滑鼠移動過程中只觸發一次事件
javascript----mouseover和mouseenter的區別