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SOLVED

Pass value from JS to sly attribute

v1101
Level 5
Level 5

Hello Community - We are using HTL Use-API to get the cookie value from the script and printing the value in the component. For some reason, it is not working as expected and it retains the previous selected value. AEM document says "Use-API" could be slower.

 

Is there any way to use the return value from a java-script to the data-sly-test attribute?

 

<sly data-sly-use.productValue="test.js" data-sly-test="${productValue.resultsFound}">
<div>${productValue.results}</span></div>
</sly>

1 Accepted Solution
Varun_Shakya
Correct answer by
Community Advisor
Community Advisor

Use jquery or javascript functions(document.cookie) to get the cookie value.

Add any class or id in div tag and with help of that identifier add the value in div tag[  $("#id").val()  ].

View solution in original post

7 Replies
Andrei_Dantsou
Level 4
Level 4

Hi @v1101,

Basically, the code written using JavaScript Use-Api is converted to Java (please see https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rhino for reference) and thus it is executed at a server side as well as Sightly (please see accepted solution here https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/sightly-javascript-use-imp...). If CDN and/or Dispatcher are used for caching content (the most likely), the server side approach for displaying cookies is not suitable - after html of a rendered page is cached, the back-end on Publish won't be hit to get the actual value and the cached one will be displayed.

I'd recommend following the fully front-end approach here - to move retrieval of cookies to JS stored in a clientlib. After the value is retrieved, it can be appended to necessary html element as described here https://api.jquery.com/append/

Regards

v1101
Level 5
Level 5
@apeksha Porwal - Thanks for your response. Can you tell me how to pass the cookie value to the back-end? i.e in data-sly-use to the WCMUsePojo in my case.
Varun_Shakya
Correct answer by
Community Advisor
Community Advisor

Use jquery or javascript functions(document.cookie) to get the cookie value.

Add any class or id in div tag and with help of that identifier add the value in div tag[  $("#id").val()  ].

View solution in original post

v1101
Level 5
Level 5
@Varun_Shakya - Thanks for your response. How to use the value return from javascript inside "data-sly-test"
Nikhil-Kumar
Community Advisor
Community Advisor

@v1101 
Try rendering it on the server side itself to retrieve the cookie and then append to some html tag.
This might solve your issue.

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>append demo</title>
<style>
p {
background: yellow;
}
</style>
</head>
<body>
 
<p>I would like to say: </p>
 
<script>
$( "p" ).append( "<strong>Hello</strong>" );
</script>
 
</body>
</html>
 
v1101
Level 5
Level 5
Nikhil_Kumar_AEM - Basically I wanted to use the JS return value inside data-sly-test element. Not sure if this can be used or not
Arun_Patidar
Community Advisor
Community Advisor

You should handle cookie from clientside.

The reason is if page is cached then your request will not go to server side to execute code based on cookie.