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How to use the nav-up attribute

青灯夜游Original: 2019-01-30 11:46:583682browse

nav-up attribute sets or retrieves the navigation direction of the object. There are four attribute values that can be set: auto (the browser determines which element to navigate to), id (specifies the id of the element being navigated, target-name (specifies the element to be navigated) target framework), inherit (specifies that the value of the nav-up attribute should be inherited from the parent element).

How to use the css nav-up attribute?

Function: nav-up attribute specifies where to navigate when using the nav-up navigation key.

Syntax:

nav-up: auto|id|target-name|inherit;

Description:

auto: The browser determines which element to navigate to.

id: Specifies the id of the navigated element.

target-name: Specifies the target frame to be navigated.

inherit: Specifies that the value of the nav-up attribute should be inherited from the parent element.

Note: Currently only Opera supports the nav-up attribute.

css nav-up attribute usage example

<!DOCTYPE html>
<html>

	<head>
		<style>
			button {
				position: absolute;
			}
			
			button#b1 {
				top: 20%;
				left: 25%;
				nav-index: 1;
				nav-right: #b2;
				nav-left: #b4;
				nav-down: #b2;
				nav-up: #b4;
			}
			
			button#b2 {
				top: 40%;
				left: 50%;
				nav-index: 2;
				nav-right: #b3;
				nav-left: #b1;
				nav-down: #b3;
				nav-up: #b1;
			}
			
			button#b3 {
				top: 70%;
				left: 25%;
				nav-index: 3;
				nav-right: #b4;
				nav-left: #b2;
				nav-down: #b4;
				nav-up: #b2;
			}
			
			button#b4 {
				top: 40%;
				left: 0%;
				nav-index: 4;
				nav-right: #b1;
				nav-left: #b3;
				nav-down: #b1;
				nav-up: #b3;
			}
		</style>
	</head>

	<body>
		<button id="b1">Button 1</button>
		<button id="b2">Button 2</button>
		<button id="b3">Button 3</button>
		<button id="b4">Button 4</button>
		<p><b>注释：</b>目前只有 Opera 支持 nav-* 属性。当您使用方向键导航时，请同时按下 Shift 键。</p>
	</body>

</html>

Rendering:

How to use the nav-up attribute

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