我需要一个div opacity fading脚本的帮助。 [英] i need help with a div opacity fading script.
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问题描述
我需要帮助修剪和纠正我失败的div淡化脚本。
请帮助。
< pre lang =xml> < html >
< script > ;
函数fader1(){
document.getElementById(myid)。style.opacity = a;
}
var a = 100;
do
{
fader1()
}
while(--a);
< / script >
< div id = myid >
这是文本。
< / div >
< / html >
解决方案
这是我的fadeElem.js文件的内容。
用法:
mFadeIn( document .getElementById( ' idOfElementToFade'),nameOfFunctionToCallWhenFadeComplete);或者,如果你不想在淡入淡出完成时做任何事情,不要提供回调
mFadeIn( document .getElementById(' idOfElementToFade'));mFadeOut具有相同的语法,它只是向相反方向淡化。
var totalTime = 100 ; // ms的时间
var ANIMATION_STEPS = 10 ; // num步从0%到100%或100%到0%
var ANIMATION_DELAY = totalTime / ANIMATION_STEPS; // 步骤之间的毫秒数
函数 mFadeIn(元素,回调)
{
element.style.opacity = 0.0跨度>;
element.style.display = block;
var stepSize = 1 / ANIMATION_STEPS;
setTimeout( function (){mAnimStep(element, 0 ,stepSize, true ,callback)},ANIMATION_DELAY);
}
function mFadeOut(element,callback)
{
element.style.opacity = 1.0;
element.style.display = block;
var stepSize = 1 / ANIMATION_STEPS;
setTimeout( function (){mAnimStep(element, 0 ,stepSize, false ,callback)},ANIMATION_DELAY);
}
function mAnimStep(element,iteration,stepSize,boolIsFadeIn,callback)
{
< span class =code-keyword> if (iteration< ANIMATION_STEPS)
{
if (boolIsFadeIn == true )
element.style.opacity =(iteration * stepSize);
else
element.style.opacity =(ANIMATION_STEPS - iteration)* stepSize;
迭代++;
setTimeout( function (){mAnimStep(element,iteration,stepSize,boolIsFadeIn,callback)},ANIMATION_DELAY);
}
else
{
element.style.opacity = ;
if (boolIsFadeIn == false )
element.style.display = < span class =code-string>' none';
if (!((callback == null )||(callback == undefined )))
{
callback();
}
}
}
尝试使用jQuery,这里有一些例子:
http://www.w3schools.com/jquery/tryit.asp?filename = tryjquery_fadeout [ ^ ]
http://www.w3schools.com/jquery/ jquery_fade.asp [ ^ ]
我不喜欢使用第三方jQuery插件。有没有办法用普通的JavaScript做到这一点?
I need help trimming and correcting my failing div fading script.
Please help.
<html>
<script>
function fader1() {
document.getElementById("myid").style.opacity= a;
}
var a = 100;
do
{
fader1()
}
while (--a);
</script>
<div id="myid">
This is text.
</div>
</html>
解决方案
Here's the contents of my fadeElem.js file.
Usage:
mFadeIn(document.getElementById('idOfElementToFade'), nameOfFunctionToCallWhenFadeComplete);or, if you dont want to do anything when fading is complete, dont supply a callback
mFadeIn( document.getElementById('idOfElementToFade') );mFadeOut has the same syntax, it just fades in the opposite direction.
var totalTime = 100; // time in ms var ANIMATION_STEPS = 10; // num steps to go from 0% to 100% or 100% to 0% var ANIMATION_DELAY = totalTime / ANIMATION_STEPS; // number of ms between steps function mFadeIn(element, callback) { element.style.opacity = "0.0"; element.style.display = "block"; var stepSize = 1 / ANIMATION_STEPS; setTimeout(function(){mAnimStep(element,0,stepSize, true, callback)},ANIMATION_DELAY); } function mFadeOut(element, callback) { element.style.opacity = "1.0"; element.style.display = "block"; var stepSize = 1 / ANIMATION_STEPS; setTimeout(function(){mAnimStep(element,0,stepSize, false, callback)},ANIMATION_DELAY); } function mAnimStep(element, iteration, stepSize, boolIsFadeIn, callback) { if (iteration < ANIMATION_STEPS) { if (boolIsFadeIn == true) element.style.opacity = (iteration * stepSize); else element.style.opacity = (ANIMATION_STEPS - iteration) * stepSize; iteration++; setTimeout(function(){mAnimStep(element,iteration,stepSize,boolIsFadeIn, callback)}, ANIMATION_DELAY); } else { element.style.opacity = ""; if (boolIsFadeIn == false) element.style.display = 'none'; if (!((callback==null)||(callback==undefined))) { callback(); } } }
Try using jQuery, some example here:
http://www.w3schools.com/jquery/tryit.asp?filename=tryjquery_fadeout[^]
http://www.w3schools.com/jquery/jquery_fade.asp[^]
I prefer not using the third-party jQuery plugin. Are there Any ways to do this with normal JavaScript?
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