# > Display a progress bar between page navigations. ## Usage Add `` in your [`app.vue`](/docs/4.x/directory-structure/app/app) or [`app/layouts/`](/docs/4.x/directory-structure/app/layouts). ```vue [app/app.vue] ``` ## Slots You can pass custom HTML or components through the loading indicator's default slot. ## Props - `color`: The color of the loading bar. It can be set to `false` to turn off explicit color styling. - `errorColor`: The color of the loading bar when `error` is set to `true`. - `height`: Height of the loading bar, in pixels (default `3`). - `duration`: Duration of the loading bar, in milliseconds (default `2000`). - `throttle`: Throttle the appearing and hiding, in milliseconds (default `200`). - `estimatedProgress`: By default Nuxt will back off as it approaches 100%. You can provide a custom function to customize the progress estimation, which is a function that receives the duration of the loading bar (above) and the elapsed time. It should return a value between 0 and 100. This component is optional.
To achieve full customization, you can implement your own one based on [its source code](https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/app/components/nuxt-loading-indicator.ts). You can hook into the underlying indicator instance using [the `useLoadingIndicator` composable](/docs/4.x/api/composables/use-loading-indicator), which will allow you to trigger start/finish events yourself. The loading indicator's speed gradually decreases after reaching a specific point controlled by `estimatedProgress`. This adjustment provides a more accurate reflection of longer page loading times and prevents the indicator from prematurely showing 100% completion. --- - [Source](https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/app/components/nuxt-loading-indicator.ts)