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How to use the nav-up attribute
- 青灯夜游Original
- 2019-01-30 11:46:583633browse
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:
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