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關(guān)于flag=true的問(wèn)題

<!DOCTYPE html>

<html>


<head>

<meta charset="UTF-8">

<title></title>

<style type="text/css">

* {

margin: 0;

padding: 0;

}


li {

width: 100px;

height: 50px;

background: red;

margin-bottom: 10px;

list-style: none;

border: 1px solid black;

opacity: 0.3;

filter: alpha(opacity: 30);

}

</style>

<script type="text/javascript">

window.onload = function() {

var li1 = document.getElementById("li1")

li1.onmouseover = function() {

kuan(this, {

width: 150,

height: 300,

opacity: 100

});

}

li1.onmouseout = function() {

kuan(this, {

width: 100,

height: 50,

opacity: 30

})

}

}


function kuan(wuti, tongshi, fn) {

clearInterval(wuti.dingshiqi)

wuti.dingshiqi = setInterval(function() {

for(var shuxing in tongshi) {

var zhi = 0

if(shuxing == "opacity") {

var zhi = parseInt(yangshi(wuti, shuxing) * 100)

// alert(zhi)

} else {

var zhi = parseInt(yangshi(wuti, shuxing))

// alert(shuxing)

}

var sudu = (tongshi[shuxing] - zhi) / 10

sudu = sudu > 0 ? Math.ceil(sudu) : Math.floor(sudu)

if(zhi != tongshi[shuxing]) {

if(shuxing == "opacity") {

wuti.style.filter = "alpha(opcity:'+(zhi+sudu)+')"

wuti.style[shuxing] = (zhi + sudu) / 100

} else {

wuti.style[shuxing] = zhi + sudu + "px"

}

}


if(zhi == tongshi[shuxing]) {

clearInterval()

if(fn) {

fn()

}

}

}

}, 50)


}


function yangshi(biaoqian, shuxing) {

if(biaoqian.currentStyle) {

return biaoqian.currentStyle[shuxing]

} else {

return getComputedStyle(biaoqian, false)[shuxing];

}

}

</script>

</head>


<body>

<ul>

<li id="li1"></li>

<!--<li id="li2"></li>-->

</ul>

</body>


</html>

我這里不設(shè)置flag屬性的話,也能達(dá)到效果,這樣子寫(xiě)會(huì)有什么BUG嗎




正在回答

1 回答

首先你這里是沒(méi)有停止計(jì)時(shí)器的:

if(zhi?==?tongshi[shuxing])?{
clearInterval()

要寫(xiě)成clearInterval(wuti.dingshiqi),當(dāng)寫(xiě)成這樣后,bug就出現(xiàn)了,不用flag=true,當(dāng)變化的任何一個(gè)屬性達(dá)到目標(biāo)值后,運(yùn)動(dòng)停止;而不是我們需要的當(dāng)所有屬性達(dá)到目標(biāo)值后,運(yùn)動(dòng)才停止

0 回復(fù) 有任何疑惑可以回復(fù)我~
#1

Hong 提問(wèn)者

非常感謝!
2017-01-16 回復(fù) 有任何疑惑可以回復(fù)我~

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