Add global variables to javascript objects and smarty templates using PrestaShop 1.7

In this blog, We are going to learn how we can assign global variables from the module. These assigned variables will work for javascript & smarty templates.

So let’s start the practical..!

Firstly, we need to register a PrestaShop hook in an existing module or any custom module. For this practical, we have created a demo module.

$this->registerHook("actionFrontControllerSetVariables");

Note: This hook is available from PrestaShop 1.7.5.0.

Now we need to create a function related to this hook & assign the required variable.

public function hookActionFrontControllerSetVariables($params)
{
    $variables = array(
        'module_display_name' => 'This text is coming from '.$this->displayName,
    ); 

    return $variables;    
}

After assigning the variables you can call these assigned variables anywhere in the whole PrestaShop templates OR javascript. Let’s see the examples.

Smarty process to use assigned variables:

We have added some custom code in product.tpl to show the assigned variable data.

Path: _ROOT_DIR_/themes/classic/templates/catalog/product.tpl

{* Code added for testing *}
<div class="alert alert-success">
    {$modules.wkdemo.module_display_name}
</div>
{* Code end *}

Now you can see the reflection on the product page in the front office. Check the below image.

Javascript process to use assigned variables:

We have added some custom code in theme.js to alert the value of the assigned variable.

Path: _ROOT_DIR_/themes/classic/assets/js/theme.js

$(document).ready(function() {
    var moduleDisplayName = prestashop.modules.wkdemo.module_display_name;

    alert(moduleDisplayName);
});

Note: You can call the assigned variable from any Javascript file OR Smarty templates.

That’s all about this blog. Hope it will help you.

If you are facing any issues or have any doubts about the above process, please feel free to contact us through the comment section.

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