# Debugging #

## Reloading JavaScript #

Instead of recompiling your app every time you make a change, you can reload your app's JavaScript code instantly. To do so, press `Command``⌘` + `R` in the browser.

## In-app Errors and Warnings #

Errors and warnings are displayed in the console of your web browser.

### Errors #

console logs and output as console.error

### Warnings #

console logs and output as console.warn

## Chrome Developer Tools #

The browser developer tools can be used for debugging, this includes adding breakpoints and inspecting runtime values. You will notice that the source is presented as a single bundle of JavaScript. However, as the React Native packager also supports sourcemaps, the original source code can also be used.

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