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Amp-list is an amp-component which calls a CORS json endpoint and displays the data in the form of a json file inside a template. Let us understand this with the help of working examples.
To work with amp-list, we need to include following script −
<script async custom-element = "amp-list" src = "https://cdn.ampproject.org/v0/amp-list-0.1.js"> </script>
This is the format of amp-list tag −
<amp-list width = "auto" height = "100"
layout = "fixed-height" src = "amplist.json" class = "m1">
<template type = "amp-mustache">
<div class = "images_for_display">
<amp-img width = "150"
height = "100"
alt = "{{title}}"
src = "{{url}}">
</amp-img>
</div>
</template>
</amp-list>
The src used for amp-list is a json file which has the details to be listed. We can use normal html tags or amp-components inside amp-list to display the data from the json file. Template type amp-mustache is used for data-binding the data to be displayed.
Let us understand this with the help of a working example as shown below −
Example
<!doctype html>
<html amp lang = "en">
<head>
<meta charset = "utf-8">
<script async src = "https://cdn.ampproject.org/v0.js"></script>
<title>Google AMP - Amp List</title>
<link rel = "canonical" href = "http://example.ampproject.org/article-metadata.html">
<meta name = "viewport" content = "width = device-width,minimum-scale = 1,initial-scale = 1">
<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>
<script async custom-element = "amp-list"
src = "https://cdn.ampproject.org/v0/amp-list-0.1.js">
</script>
<script async custom-template = "amp-mustache"
src ="https://cdn.ampproject.org/v0/amp-mustache-0.2.js">
</script>
<style amp-custom>
amp-img {
border: 1px solid #ddd;
border-radius: 4px;
padding: 5px;
}
</style>
</head>
<body>
<h3>Google AMP - Amp List</h3>
<amp-list width = "auto" height = "100"
layout = "fixed-height" src = "amplist.json" class = "m1">
<template type = "amp-mustache">
<div class = "images_for_display">
<amp-img width = "150"
height = "100"
alt = "{{title}}"
src = "{{url}}">
</amp-img>
</div>
</template>
</amp-list>
</body>
</html>
Output
The output of the working example shown above is as shown below −
The json file used in the working example given above is shown here −
{
"items": [
{
"title": "Christmas Image 1",
"url": "images/christmas1.jpg"
},
{
"title": "Christmas Image 2",
"url": "images/christmas2.jpg"
},
{
"title": "Christmas Image 3",
"url": "images/christmas3.jpg"
},
{
"title": "Christmas Image 4",
"url": "images/christmas4.jpg"
}
]
}
We can refresh the list using event on the amp-list as shown in the code given below −
Example
<!doctype html>
<html amp lang = "en">
<head>
<meta charset = "utf-8">
<script async src = "https://cdn.ampproject.org/v0.js"></script>
<title>Google AMP - Amp List</title>
<link rel = "canonical" href = "http://example.ampproject.org/article-metadata.html">
<meta name = "viewport" content = "width = device-width,minimum-scale = 1,initial-scale = 1">
<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>
<script async custom-element = "amp-list"
src = "https://cdn.ampproject.org/v0/amp-list-0.1.js">
</script>
<script async custom-template = "amp-mustache"
src = "https://cdn.ampproject.org/v0/amp-mustache-0.2.js">
</script>
<style amp-custom>
amp-img {
border: 1px solid #ddd;
border-radius: 4px;
padding: 5px;
}
button{
background-color: #ACAD5C;
color: white;
padding: 12px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
float: right;
}
</style>
</head>
<body>
<h3>Google AMP - Amp List</h3>
<button on = "tap:amplist.refresh">Refresh Images</button>
<amp-list id = "amplist" width = "auto" height = "100"
layout = "fixed-height" src = "amplist.json" class = "m1">
<template type = "amp-mustache">
<div class = "images_for_display">
<amp-img width = "150"
height = "100"
alt = "{{title}}"
src = "{{url}}"></amp-img>
</div>
</template>
</amp-list>
</body>
</html>
Output
The output for the working example given above is as shown here −
There is a button added which when clicked calls the refresh action using the on event as shown below −
<button on = "tap:amplist.refresh"> Refresh Images </button> //amplist is the id used for amp-list
Onclick of the button the json file is called again and the contents are loaded. If there are images already loaded, they will be cached.
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