Question: I want to load store logo image URL in javascript so i can bind it to my knockout element, how can i achieve that?

Answer: 
To get store logo url. You need to add this below code in your block :

```
<?php

namespace RH\Helloworld\Block;

class CustDetails extends \Magento\Framework\View\Element\Template
{
    protected $logo;    

    public function __construct(
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Theme\Block\Html\Header\Logo $logo,
        array $data = []
    )
    {        
        $this->logo = $logo;
        parent::__construct($context, $data);
    }

    public function getStoreLogoUrl()
    {    
        return $this->logo->getLogoSrc(); // Return Logo Url
    }   
}
?>

```

After that, you need to get this value in your phtml file and pass that value using `<script type="text/x-magento-init">` like this below way :

```
<?php
    $logoUrl = $block->getStoreLogoUrl();
?>

<div id="m2-component" data-bind="scope:'ko'">
<script type="text/x-magento-init">
    {
        "#m2-component": {
            "Magento_Ui/js/core/app": {
               "components": {
                    "ko": {
                        "component": "RH_Helloworld/js/myjs",
                        "template" : "RH_Helloworld/myjs",
                        "logoUrl": <?= /* @escapeNotVerified */ $logoUrl ?>
                    }
                }
            }
        }
    }
    </script>
</div>

```

Now, You to get value in js file add this below js code in your js file :

**myjs.js**

```
define(['uiComponent', 'ko', 'jquery'], function (Component, ko, jquery) {

    return Component.extend({
        initialize: function (config) {
            var self = this;
            this._super();
            console.log(config.logoUrl);
        },
});

```

Hope, It's helpful for you.
You can use mage-x-init and pass logo as arguments json.