Three implementation methods: 1. Use fadeOut() to gradually change the opacity of the selected element, from visible to hidden, with the syntax "element object.fadeIn (fade in duration)"; 2. Use fadeTo() Gradually change the opacity of the selected element, the syntax is "element object.fadeTo(fade duration, 0)"; 3. Use fadeToggle() to gradually change the opacity of the selected element, the syntax is "element object.fadeToggle(fade duration) ".
The operating environment of this tutorial: windows7 system, jquery3.6.1 version, Dell G3 computer.
In jquery, there are three methods to achieve the fade effect of div:
fadeOut() method
fadeToggle () Method
fadeTo() Method
##1、fadeOut() Method
fadeOut () method gradually changes the opacity of the selected element from visible to hidden (fade effect). Syntax:$(selector).fadeOut(speed,easing,callback)
| Description | |
|---|---|
| speed | Optional. Specifies the speed of the fading effect.Possible values:
|
| easing | Optional. Specifies the element's speed at different points in the animation. The default value is "swing".Possible values:
|
| callback | Optional. The callback function to be executed after the fadeOut() method is executed.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="js/jquery-3.6.1.min.js"></script>
<script>
$(document).ready(function() {
$("button").click(function() {
$("#div1").fadeOut();
$("#div2").fadeOut("slow");
$("#div3").fadeOut(3000);
});
});
</script>
</head>
<body>
<p>以下实例演示了 fadeOut() 使用了不同参数的效果。</p>
<button>点击渐隐div元素。</button>
<br><br>
<div id="div1" style="width:80px;height:80px;background-color:red;"></div><br>
<div id="div2" style="width:80px;height:80px;background-color:green;"></div><br>
<div id="div3" style="width:80px;height:80px;background-color:blue;"></div>
</body>
</html>
## The #fadeTo() method allows a fade to a given opacity (value between 0 and 1).
Syntax:$(selector).fadeTo(speed,opacity,callback);The required speed parameter specifies the duration of the effect. It can take the following values: "slow", "fast", or milliseconds.
- The required opacity parameter in the fadeTo() method sets the fade effect to the given opacity (a value between 0 and 1).
- The optional callback parameter is the name of the function to be executed after the function completes.
- You only need to set the value of the opacityc parameter to 0 to achieve the fade effect.
$(document).ready(function() {
$("button").click(function() {
$("#div1").fadeTo("fast",0);
$("#div2").fadeTo("slow",0);
$("#div3").fadeTo(3000,0);
});
});
3. fadeToggle() method
fadeToggle() method can be between fadeIn() and fadeOut() methods Make the switch.
fadeToggle() adds a fade-in effect to the element if it is hidden.- fadeToggle() adds a fade out effect to the element if it is already displayed.
$(document).ready(function() { $("button").click(function() { $("#div1").fadeToggle(); $("#div2").fadeToggle("slow"); $("#div3").fadeToggle(5000); }); });
[Recommended learning: jQuery video tutorial
web front-end】
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