使用 JQuery 的黄色渐变效果

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最佳答案

This function is part of jQuery effects.core.js :

$("#box").effect("highlight", {}, 1500);

As Steerpike pointed out in the comments, effects.core.js and effects.highlight.js need to be included in order to use this.

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(function($) {
$.fn.yellowFade = function() {
this.animate( { backgroundColor: "#ffffcc" }, 1 ).animate( { backgroundColor: "#ffffff" }, 1500 );
}
})(jQuery);

Should do the trick. Set it to the yellow, then fade it to white

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function YellowFade(selector){
$(selector)
.css('opacity', 0)
.animate({ backgroundColor: 'Yellow', opacity: 1.0 }, 1000)
.animate({ backgroundColor: '#ffffff', opacity: 0.0}, 350, function() {
this.style.removeAttribute('filter');
});
}

The line this.style.removeAttribute('filter') is for an anti-aliasing bug in IE.

Now, call YellowFade from wherever, and pass your selector

YellowFade('#myDivId');

Credit: Phil Haack had a demo showing exactly how to do this. He was doing a demo on JQuery and ASPNet MVC.

Take a look at this video

Update: Did you take a look at the video? Forgot to mention this requires the JQuery.Color plugin

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I just solved a problem similar to this on a project I was working on. By default, the animate function cannot animate colors. Try including jQuery Color Animations.

All the answers here use this plugin but no one mentions it.

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I hated adding 23kb just to add effects.core.js and effects.highlight.js so I wrote the following. It emulates the behavior by using fadeIn (which is part of jQuery itself) to 'flash' the element:

$.fn.faderEffect = function(options){
options = jQuery.extend({
count: 3, // how many times to fadein
speed: 500, // spped of fadein
callback: false // call when done
}, options);


return this.each(function(){


// if we're done, do the callback
if (0 == options.count)
{
if ( $.isFunction(options.callback) ) options.callback.call(this);
return;
}


// hide so we can fade in
if ( $(this).is(':visible') ) $(this).hide();


// fade in, and call again
$(this).fadeIn(options.speed, function(){
options.count = options.count - 1; // countdown
$(this).faderEffect(options);
});
});
}

then call it with $('.item').faderEffect();

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Actually, I have a solution that only needs jQuery 1.3x, and no aditionnal plugin.

First, add the following functions to your script

function easeInOut(minValue,maxValue,totalSteps,actualStep,powr) {
var delta = maxValue - minValue;
var stepp = minValue+(Math.pow(((1 / totalSteps)*actualStep),powr)*delta);
return Math.ceil(stepp)
}


function doBGFade(elem,startRGB,endRGB,finalColor,steps,intervals,powr) {
if (elem.bgFadeInt) window.clearInterval(elem.bgFadeInt);
var actStep = 0;
elem.bgFadeInt = window.setInterval(
function() {
elem.css("backgroundColor", "rgb("+
easeInOut(startRGB[0],endRGB[0],steps,actStep,powr)+","+
easeInOut(startRGB[1],endRGB[1],steps,actStep,powr)+","+
easeInOut(startRGB[2],endRGB[2],steps,actStep,powr)+")"
);
actStep++;
if (actStep > steps) {
elem.css("backgroundColor", finalColor);
window.clearInterval(elem.bgFadeInt);
}
}
,intervals)
}

Next, call the function using this:

doBGFade( $(selector),[245,255,159],[255,255,255],'transparent',75,20,4 );

I'll let you guess the parameters, they are pretty self explanatory. To be honest the script is not from me, I took it on a page then changed it so it works with the latest jQuery.

NB: tested on firefox 3 and ie 6 (yes it works on that old thing too)

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This is a non-jQuery option you can use for the color fade effect. In the array "colors", you add the transition colors you need from the initial color until the last color. You can add as much colors as you want.

   <html lang="en">
<head>
<script type="text/javascript">
//###Face Effect for a text box#######


var targetColor;
var interval1;
var interval2;
var i=0;
var colors = ["#FFFF00","#FFFF33","#FFFF66","#FFFF99","#FFFFCC","#FFFFFF"];


function changeColor(){
if (i<colors.length){
document.getElementById("p1").style.backgroundColor=colors[i];
i++;
}
else{
window.clearInterval(interval1);
i=0;
}
}
addEventListener("load",function(){
document.getElementById("p1").addEventListener("click",function(e){
interval1=setInterval("changeColor()",80);


})
});
</script>


</head>


<body>
<p id="p1">Click this text box to see the fade effect</p>


<footer>
<p>By Jefrey Bulla</p>
</footer>
</div>
</body>
</html>

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If you'd like to try an alternative yellow fade technique that does not depend on jQuery UI .effect, you could position a yellow (or another color) div behind your content and use the jQuery .fadeOut().

http://jsfiddle.net/yFJzn/2/

<div class="yft">
<div class="content">This is some content</div>
<div class="yft_fade">&nbsp;</div>
</div>


<style>
.yft_fade {
background-color:yellow;
display:none;
}
.content {
position:absolute;
top:0px;
}
</style>


<script>
$(document).ready(function() {
$(".yft").click(function() {
$(this).find(".yft_fade").show().fadeOut();
});
});
</script>

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The jQuery effects library adds quite a bit of unneeded overhead to your app. You can accomplish the same thing with jQuery only. http://jsfiddle.net/x2jrU/92/

jQuery.fn.highlight = function() {
$(this).each(function() {
var el = $(this);
el.before("<div/>")
el.prev()
.width(el.width())
.height(el.height())
.css({
"position": "absolute",
"background-color": "#ffff99",
"opacity": ".9"
})
.fadeOut(500);
});
}


$("#target").highlight();

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I loved Sterling Nichols answer, since it was lightweight and didn't require a plugin. However, I discovered it didn't work with floating elements (i.e. such as when the element is "float:right"). So I re-wrote the code to display the highlight properly no matter how the element is positioned on the page:

jQuery.fn.highlight = function () {
$(this).each(function () {
var el = $(this);
$("<div/>")
.width(el.outerWidth())
.height(el.outerHeight())
.css({
"position": "absolute",
"left": el.offset().left,
"top": el.offset().top,
"background-color": "#ffff99",
"opacity": ".7",
"z-index": "9999999"
}).appendTo('body').fadeOut(1000).queue(function () { $(this).remove(); });
});
}

Optional:
Use the following code if you also want to match the border-radius of the element:

jQuery.fn.highlight = function () {
$(this).each(function () {
var el = $(this);
$("<div/>")
.width(el.outerWidth())
.height(el.outerHeight())
.css({
"position": "absolute",
"left": el.offset().left,
"top": el.offset().top,
"background-color": "#ffff99",
"opacity": ".7",
"z-index": "9999999",
"border-top-left-radius": parseInt(el.css("borderTopLeftRadius"), 10),
"border-top-right-radius": parseInt(el.css("borderTopRightRadius"), 10),
"border-bottom-left-radius": parseInt(el.css("borderBottomLeftRadius"), 10),
"border-bottom-right-radius": parseInt(el.css("borderBottomRightRadius"), 10)
}).appendTo('body').fadeOut(1000).queue(function () { $(this).remove(); });
});
}

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this is my solution for the problem. it works excelent. it passes jslint error validation and also works decent in IE8 and IE9. Of course you can tweak it to accept color codes and callbacks:

jQuery.fn.highlight = function(level) {


highlightIn = function(options){


var el = options.el;
var visible = options.visible !== undefined ? options.visible : true;


setTimeout(function(){
if (visible) {
el.css('background-color', 'rgba('+[255, 64, 64]+','+options.iteration/10+')');
if (options.iteration/10 < 1) {
options.iteration += 2;
highlightIn(options);
}
} else {
el.css('background-color', 'rgba('+[255, 64, 64]+','+options.iteration/10+')');
if (options.iteration/10 > 0) {
options.iteration -= 2;
highlightIn(options);
} else {
el.css('background-color', '#fff');
}
}
}, 50);
};


highlightOut = function(options) {
options.visible = false;
highlightIn(options);
};


level = typeof level !== 'undefined' ? level : 'warning';
highlightIn({'iteration': 1, 'el': $(this), 'color': level});
highlightOut({'iteration': 10, 'el': $(this), 'color': level});
};

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I simply used...

<style>
tr.highlight {
background: #fffec6;
}
</style>




<script>
//on page load, add class
$(window).load(function() {
$("tr.table-item-id").addClass("highlight", 1200);
});


//fade out class
setTimeout(function(){
$("tr.table-item-id").removeClass("highlight", 1200);
}, 5200);


</script>

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A simple/raw script for a "yellow fadeout", no plugins except jquery itself. Just setting background with rgb(255,255,highlightcolor) in a timer:

<script>


$(document).ready(function () {
yellowFadeout();
});


function yellowFadeout() {
if (typeof (yellowFadeout.timer) == "undefined")
yellowFadeout.timer = setInterval(yellowFadeout, 50);
if (typeof (yellowFadeout.highlightColor) == "undefined")
yellowFadeout.highlightColor = 0;
$(".highlight").css('background', 'rgb(255,255,' + yellowFadeout.highlightColor + ')');
yellowFadeout.highlightColor += 10;
if (yellowFadeout.highlightColor >= 255) {
$(".highlight").css('background','');
clearInterval(yellowFadeout.timer);
}
}
</script>

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Define your CSS as follows:

@-webkit-keyframes yellowfade {
from { background: yellow; }
to { background: transparent; }
}


@-moz-keyframes yellowfade {
from { background: yellow; }
to { background: transparent; }
}


.yft {
-webkit-animation: yellowfade 1.5s;
-moz-animation: yellowfade 1.5s;
animation: yellowfade 1.5s;
}

And just add the class yft to any item $('.some-item').addClass('yft')

Demo: http://jsfiddle.net/Q8KVC/528/

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YOU NEED ONLY HTML TO DO THIS. No CSS or JS required!

Suppose you have a text on a certain page that you want to temporarily "highlight and show" to users upon visiting the page.

And let the content on that page to be highlighted be a h2 tag and a p tag content as shown below:


<h2>Carbon Steel for Blacksmithing</h2>


<p>The vast majority of blacksmithing uses low and medium carbon steels. High carbon steel, sometimes called “carbon tool steel,” is very hard, and difficult to bend or weld; it gets very brittle once it’s been heat-treated.</p>
<p>You can buy steel, or you can find and recycle. I prefer the later.</p>

Given below: a link that will ACTUALLY highlight the content that is shown above. Whenever a user clicks this link... they get redirected to the page to the same spot where where the content is, and also the text is highlighted!

https://stackoverflow.com/questions/848797/yellow-fade-effect-with-jquery/63571443#:~:text=Carbon%20Steel%20for%20Blacksmithing,you%20can%20find%20and%20recycle.

To give a live example: Follow the link given above to see the highlight effect upon the content that I mentioned in the link.