Ndtyjky

So I have the following file structure:

plugins/myname/pluginname/components/pluginname/default.htm

plugins/myname/pluginname/components/PluginName.php

default.htm acts as the partial of the component.
and I have the following JS API

setInterval(function(){

    $.request('onEverySecond', {

        update: {'@default.htm':'#rate-marquee'},

        complete: function() {

            console.log('Finished!');

        }

    })

}, 1000);

onEverySecond is a function in PluginName.php that updates a variable called fx thrown to default.htm.

At the front end the partial default.htm seems to be updated, but it refreshes the whole partial which is not what I want, it causes the marquee to replay again and again and only be able to show the first few piece of contents.
All I wanted is that the AJAX will update only the variable fx where the data is updated.

How can I achieve that?

EDIT 1:

Here is the partial markup:

{% set fx = __SELF__.fx %}

<marquee id="rate-marquee" name="rate-marquee" onmouseover="this.stop();" onmouseout="this.start();">

    <ul>

        {% for item in fx %}

            <li>

            {{ item.Item | trim('u')}}: {{ item.BID }} {% if item.Revalue == 0 %} <div class="arrow-up"></div> {% else %} <div class="arrow-down"></div> {% endif %}

            </li>

        {% endfor %}

    </ul>

</marquee>

Additionally, here is the code in PluginName.php

public function onRun()

{

    $this->addJs('/plugins/SoyeggWebDevelopment/fxmarquee/assets/js/default.js');

    $this->updateFX();

}





public function onEverySecond()

{

    $this->updateFX();

}



public $fx;

So updateFX() works perfectly well too.

Here problem seems you are replacing whole marquee it causes to re-render it.

To solve this we can just update portion inside marquee

setInterval(function(){

    $.request('onEverySecond', {        

        complete: function() {

            console.log('Finished!');

        }

    })

}, 1000);

We don't do anything special here just a simple ajax call

to update portion of marquee we need to assign id to it and we define internal partial

<marquee id="rate-marquee" 

         name="rate-marquee" 

         onmouseover="this.stop();" onmouseout="this.start();">

    <ul id='rate-marquee-inner'> <!-- <= here -->

      {% partial __SELF__ ~ '::_marquee_inner' %}        

    </ul>

</marquee>

_marquee_inner.htm partila markup

{% set fx = __SELF__.fx %}

{% for item in fx %}

    <li>

    {{ item.Item | trim('u')}}: {{ item.BID }} {% if item.Revalue == 0 %} <div class="arrow-up"></div> {% else %} <div class="arrow-down"></div> {% endif %}

    </li>

{% endfor %}

and to update that portion we just need to return markup array

function onEverySecond() {

    $this->updateFX();

    return ['#rate-marquee-inner' => $this->renderPartial('_marquee_inner.htm')];

}

this will just push new updated markup to given id #rate-marquee-inner so now it will just update inner portion of marquee and marquee will not re-render.

if any doubt please comment.