# Form input parameters

## Form input parameters <a href="#parametrywejscioweformularza-parametrywejscioweformularza" id="parametrywejscioweformularza-parametrywejscioweformularza"></a>

To pass parameters through the URL to a form, we need to define a variable or add a component to which we want to pass this parameter.

In the application edit view, in the left menu, select the option **Input parameters**, and then **Add input parameter**. As the value **Alias** we enter the name of the injected variable alias. **Alias** will be part of the application page URL. As **Application component** we choose a field from the application or a session variable. We can also assign it a default value, which will be used if the parameter is not passed in the URL.

<figure><img src="/files/43950ed291c197204a31ab888551595974dd3cf7" alt=""><figcaption><p><em><strong>Figure 1.</strong> Form input parameters</em></p></figcaption></figure>

### **Ways to pass parameters**

1. Passing a parameter directly in the URL:\
   \
   <http://platform-address/?parameter=value#/application-name>

{% hint style="danger" %}
**Passing the parameter**

The parameter must be passed correctly in the address. Correct example: [http://platform-address/?parameter=value#/application-name](http://adres-do-platformy/?parametr=wartosc#/nazwa-wniosku). The parameter must be before #.
{% endhint %}

2. Passing a parameter as a hidden input field:

```
<form action="#/application-name">
   <input class="redirect-button" type="submit" value="Go"/>
   <input type="hidden" id="parameter" name="parameter" value="value"/>
</form>
```

### Input parameters of composite components

More information can be found in the section [Composite component input parameters](/documentation/documentation-en/budowanie-aplikacji/interfejs-uzytkownika/komponenty-rozszerzone/komponenty-zlozone.md#parametry-wejsciowe)

\ <br>


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