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How to achieve discoloration effect on mouse hover in javascript

青灯夜游
青灯夜游Original
2022-01-18 18:15:439988browse

Javascript method to implement mouseover discoloration: 1. Bind the element to the onmouseover event and set the event processing function; 2. In the event processing function, use "element object.style.color attribute name="color The value ";" statement sets the effect of the element's color change when a hover event is triggered.

How to achieve discoloration effect on mouse hover in javascript

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Idea: For upper-level elements and parent elements, lower-level elements and child elements can change color. Just :hover and css selectors are all it takes. Subordinate elements operate on superior elements by using the onmouseover and onmouseout events in JavaScript

  • The onmouseover event occurs when the mouse pointer moves to the specified element.

  • The onmouseout event occurs when the mouse pointer moves out of the specified object.

1. HTML code

<body>
	<div id="A">
		<div id="B">
			鼠标移动到 A div 时,我要变色
		</div>
	</div>
	<hr />
	<div id="AB">			
		<div id="a">
			一号 div
		</div>
		<div id="b">
			二号 div
		</div>
	</div>
</body>

2. JavaScript code

 Note: It is recommended to write it before the closing tag of the body

<script type="text/javascript">
	document.getElementById("b").onmouseover=function(){
		document.getElementById("a").style.backgroundColor="green";
	}
	document.getElementById("b").onmouseout=function(){
		document.getElementById("a").style.backgroundColor="red";
	}
</script>

3. CSS code

	<style type="text/css">
		#A{
			height: 400px;
			width: 400px;
			background-color: red;
		}
		#B{
			height: 300px;
			width: 300px;
			background-color: green;
			display: none;
		}
		#A:hover #B{
			display: block;
		}
		#a{
			height: 300px;
			width: 300px;
			background-color: red;
		}
		#b{
			margin-left: 50px;
			height: 300px;
			width: 300px;
			background-color: red;
		}
		#a:hover+#b {
			background-color: green;
		}
	</style>

4. Rendering

How to achieve discoloration effect on mouse hover in javascript

How to achieve discoloration effect on mouse hover in javascript

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