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AppML application allows to control the UI using the controller function. appml-controller tag provides the name of the javascript function which acts as a controller. AppML application may or may not have a controller.
Syntax
<table appml-controller="studentController"></table>
AppML sends messages to controller function via an application object denoted by $appml. Based on the properties of $appml we can perform various types of operations on HTML content. Following are some of the important examples.
-
Initialize data
-
Update application data
-
Input/output handling
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Data validation
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Data summarization
-
Error handling
-
Application start/stop
Example
student_application.html
<!DOCTYPE html>
<html lang="en-US">
<title>Students</title>
<style>
table {
border-collapse: collapse;
width: 100%;
}
th, td {
text-align: left;
padding: 8px;
}
tr:nth-child(even) {background-color: #f2f2f2;}
</style>
<script src="https://www.w3schools.com/appml/2.0.3/appml.js"></script>
<body>
<h1>Students</h1>
<table appml-data="students" appml-controller="studentController">
<tr>
<th>Student</th>
<th>Class</th>
<th>Section</th>
</tr>
<tr appml-repeat="records">
<td>{{studentName}}</td>
<td>{{class}}</td>
<td>{{section}}</td>
</tr>
</table>
<script>
var students = {
"records":[
{"studentName":"Ramesh","class":"12","section":"White"},
{"studentName":"Suresh","class":"12","section":"Red"},
{"studentName":"Mohan","class":"12","section":"Red"},
{"studentName":"Robert","class":"12","section":"Red"},
{"studentName":"Julie","class":"12","section":"White"},
{"studentName":"Ali","class":"12","section":"White"},
{"studentName":"Harjeet","class":"12","section":"White"}
]};
function studentController($appml) {
if ($appml.message == "display") {
if ($appml.display.name == "studentName") {
$appml.display.value = $appml.display.value.toUpperCase();
}
}
}
</script>
</body>
</html>
Output
Deploy the application on Web Server and access the html page. Verify the output.
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