> For the complete documentation index, see [llms.txt](https://docs.wisej.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/docs/welcome/releases/whats-new-in-3.2/design-time-debug.md).

# Design-Time Debug

When enabled, Wisej.NET will show the Edge renderer(s) it uses to display each control in the pixel-perfect design view.

<div align="left"><figure><img src="/files/rfLwscZksVVCF3pZNhzG" alt=""><figcaption></figcaption></figure></div>

You will see one or more small windows that show the renderers managed by the design view. When debugging the client side JavaScript, we recommend setting the Parallel Renderers to 1 - it's much easier to have only one Developer-Tools window open.

Click anywhere on the renderer window and press F12 to open the Developer Tools window.

<figure><img src="/files/4Fvsc562opRz757NKZdn" alt=""><figcaption></figcaption></figure>

With the Developer Tools open you can fully debug everything the designer renderer does on the JavaScript side. In Visual Studio you will also see the same debug view displayed in Chrome or Edge when showing the developer tools.

<figure><img src="/files/iO3JkQbdI49WZANpOndl" alt=""><figcaption></figcaption></figure>

Using this powerful features allows widget developers to debug and test their JavaScript implementation at design time.


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