srcmini本文概述
有时你想向AMP页面添加自定义交互性, 以使页面看起来更加用户友好和用户调用。尽管AMP的预建组件受到限制, 但还是通过amp-bind来解决此问题。它可以帮助开发人员在不使用AMP预制组件的情况下向页面添加自定义交互性。你可以使用amp-bind在用户与页面交互时动态更改文本。
设定：要在页面中使用amp-bind, 必须将其脚本导入文档的标题中。
HTML代码实例
<script async custom-element = "amp-bind"
src = "https://cdn.ampproject.org/v0/amp-bind-0.1.js">
</script>Google AMP的放大器绑定包括三个主要概念：
- 州：状态变量负责根据用户操作在页面上进行更新。定义状态变量非常重要。
- 表达：它们就像用于引用状态的JavaScript表达式一样。
- 捆绑：它们是一种特殊的属性, 用于通过表达式将元素的属性链接到状态。
例子：
HTML代码实例
<!doctype html>
<html amp>
<head>
<meta charset = "utf-8">
<title>Google AMP amp-bind</title>
<link rel = "canonical" href =
"https://amp.dev/documentation/examples/components/amp-bind/index.html">
<meta name = "viewport" content =
"width=device-width, minimum-scale=1, initial-scale=1">
<script async src =
"https://cdn.ampproject.org/v0.js">
</script>
<script async custom-element = "amp-bind"
src = "https://cdn.ampproject.org/v0/amp-bind-0.1.js">
</script>
<style amp-boilerplate>
body {
-webkit-animation: -amp-start 8s
steps(1, end) 0s 1 normal both;
-moz-animation: -amp-start 8s
steps(1, end) 0s 1 normal both;
-ms-animation: -amp-start 8s
steps(1, end) 0s 1 normal both;
animation: -amp-start 8s
steps(1, end) 0s 1 normal both;
}
@-webkit-keyframes -amp-start {
from {
visibility: hidden
}
to {
visibility: visible
}
}
@-moz-keyframes -amp-start {
from {
visibility: hidden
}
to {
visibility: visible
}
}
@-ms-keyframes -amp-start {
from {
visibility: hidden
}
to {
visibility: visible
}
}
@-o-keyframes -amp-start {
from {
visibility: hidden
}
to {
visibility: visible
}
}
@keyframes -amp-start {
from {
visibility: hidden
}
to {
visibility: visible
}
}
</style>
<noscript>
<style amp-boilerplate>
body {
-webkit-animation: none;
-moz-animation: none;
-ms-animation: none;
animation: none
}
</style>
</noscript>
<style amp-custom>
h1 {
color: forestgreen;
text-align: center;
}
.gfgNew {
border: 5px solid crimson;
}
.gfgOld {
border: 5px solid orange;
}
</style>
</head>
<body>
<h1>
Geeks For Geeks
</h1>
<amp-state id = "gfg">
<script type = "application/json">
{
"new": {
"imageUrl":
"https://media.srcmini.org/wp-content/cdn-uploads/gfg_200x200-min.png", "style": "gfgNew"
}, "old": {
"imageUrl":
"https://media.srcmini.org/wp-content/uploads/20201026154131/logogfg.png", "style": "gfgOld"
}
}
</script>
</amp-state>
<div style = "padding: 1em;">
<p>
Each logo has different border color...
</p>
<h4 ="'This is ' + logo + ' logo...'">
This is old logo...
</h4>
<center>
<amp-img width = "200" height = "200" src =
"https://media.srcmini.org/wp-content/uploads/20201026154131/logogfg.png"
[src]="gfg[logo].imageUrl"
class = "gfgOld"
[class]="gfg[logo].style">
</amp-img>
<br>
<button on = "tap:AMP.setState({logo: 'new'})">
New Logo
</button>
<button on = "tap:AMP.setState({logo: 'old'})">
Old Logo
</button>
</center>
</div>
</body>
</html>输出如下：
按下”新徽标”按钮时, 图像和边框颜色都动态更改。当我们点击”旧徽标”按钮时, 图像和边框颜色更改为先前的组合。
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