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docs/features/explorer.md
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docs/features/explorer.md
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---
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title: "Explorer"
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tags:
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- component
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---
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Quartz features an explorer that allows you to navigate all files and folders on your site. It supports nested folders and is highly customizable.
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By default, it shows all folders and files on your page. To display the explorer in a different spot, you can edit the [[layout]].
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Display names for folders get determined by the `title` frontmatter field in `folder/index.md` (more detail in [[authoring content | Authoring Content]]). If this file does not exist or does not contain frontmatter, the local folder name will be used instead.
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> [!info]
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> The explorer uses local storage by default to save the state of your explorer. This is done to ensure a smooth experience when navigating to different pages.
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>
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> To clear/delete the explorer state from local storage, delete the `fileTree` entry (guide on how to delete a key from local storage in chromium based browsers can be found [here](https://docs.devolutions.net/kb/general-knowledge-base/clear-browser-local-storage/clear-chrome-local-storage/)). You can disable this by passing `useSavedState: false` as an argument.
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## Customization
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Most configuration can be done by passing in options to `Component.Explorer()`.
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For example, here's what the default configuration looks like:
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```typescript title="quartz.layout.ts"
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Component.Explorer({
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title: "Explorer", // title of the explorer component
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folderClickBehavior: "collapse", // what happens when you click a folder ("link" to navigate to folder page on click or "collapse" to collapse folder on click)
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folderDefaultState: "collapsed", // default state of folders ("collapsed" or "open")
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useSavedState: true, // whether to use local storage to save "state" (which folders are opened) of explorer
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// omitted but shown later
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sortFn: ...,
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filterFn: ...,
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mapFn: ...,
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// what order to apply functions in
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order: ["filter", "map", "sort"],
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})
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```
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When passing in your own options, you can omit any or all of these fields if you'd like to keep the default value for that field.
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Want to customize it even more?
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- Removing explorer: remove `Component.Explorer()` from `quartz.layout.ts`
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- (optional): After removing the explorer component, you can move the [[table of contents | Table of Contents]] component back to the `left` part of the layout
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- Changing `sort`, `filter` and `map` behavior: explained in [[#Advanced customization]]
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- Component: `quartz/components/Explorer.tsx`
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- Style: `quartz/components/styles/explorer.scss`
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- Script: `quartz/components/scripts/explorer.inline.ts`
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## Advanced customization
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This component allows you to fully customize all of its behavior. You can pass a custom `sort`, `filter` and `map` function.
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All functions you can pass work with the `FileTrieNode` class, which has the following properties:
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```ts title="quartz/components/Explorer.tsx"
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class FileTrieNode {
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isFolder: boolean
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children: Array<FileTrieNode>
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data: ContentDetails | null
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}
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```
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```ts title="quartz/plugins/emitters/contentIndex.tsx"
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export type ContentDetails = {
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slug: FullSlug
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title: string
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links: SimpleSlug[]
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tags: string[]
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content: string
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}
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```
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Every function you can pass is optional. By default, only a `sort` function will be used:
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```ts title="Default sort function"
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// Sort order: folders first, then files. Sort folders and files alphabetically
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Component.Explorer({
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sortFn: (a, b) => {
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if ((!a.isFolder && !b.isFolder) || (a.isFolder && b.isFolder)) {
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return a.displayName.localeCompare(b.displayName, undefined, {
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numeric: true,
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sensitivity: "base",
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})
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}
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if (!a.isFolder && b.isFolder) {
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return 1
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} else {
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return -1
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}
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},
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})
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```
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---
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You can pass your own functions for `sortFn`, `filterFn` and `mapFn`. All functions will be executed in the order provided by the `order` option (see [[#Customization]]). These functions behave similarly to their `Array.prototype` counterpart, except they modify the entire `FileNode` tree in place instead of returning a new one.
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For more information on how to use `sort`, `filter` and `map`, you can check [Array.prototype.sort()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort), [Array.prototype.filter()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter) and [Array.prototype.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).
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Type definitions look like this:
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```ts
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type SortFn = (a: FileTrieNode, b: FileTrieNode) => number
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type FilterFn = (node: FileTrieNode) => boolean
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type MapFn = (node: FileTrieNode) => void
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```
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## Basic examples
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These examples show the basic usage of `sort`, `map` and `filter`.
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### Use `sort` to put files first
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Using this example, the explorer will alphabetically sort everything.
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```ts title="quartz.layout.ts"
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Component.Explorer({
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sortFn: (a, b) => {
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return a.displayName.localeCompare(b.displayName)
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},
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})
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```
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### Change display names (`map`)
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Using this example, the display names of all `FileNodes` (folders + files) will be converted to full upper case.
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```ts title="quartz.layout.ts"
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Component.Explorer({
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mapFn: (node) => {
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node.displayName = node.displayName.toUpperCase()
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return node
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},
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})
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```
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### Remove list of elements (`filter`)
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Using this example, you can remove elements from your explorer by providing an array of folders/files to exclude.
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Note that this example filters on the title but you can also do it via slug or any other field available on `FileTrieNode`.
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```ts title="quartz.layout.ts"
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Component.Explorer({
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filterFn: (node) => {
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// set containing names of everything you want to filter out
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const omit = new Set(["authoring content", "tags", "advanced"])
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// can also use node.slug or by anything on node.data
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// note that node.data is only present for files that exist on disk
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// (e.g. implicit folder nodes that have no associated index.md)
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return !omit.has(node.displayName.toLowerCase())
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},
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})
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```
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### Remove files by tag
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You can access the tags of a file by `node.data.tags`.
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```ts title="quartz.layout.ts"
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Component.Explorer({
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filterFn: (node) => {
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// exclude files with the tag "explorerexclude"
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return node.data.tags?.includes("explorerexclude") !== true
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},
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})
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```
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### Show every element in explorer
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By default, the explorer will filter out the `tags` folder.
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To override the default filter function, you can set the filter function to `undefined`.
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```ts title="quartz.layout.ts"
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Component.Explorer({
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filterFn: undefined, // apply no filter function, every file and folder will visible
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})
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```
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## Advanced examples
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> [!tip]
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> When writing more complicated functions, the `layout` file can start to look very cramped.
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> You can fix this by defining your sort functions outside of the component
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> and passing it in.
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>
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> ```ts title="quartz.layout.ts"
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> import { Options } from "./quartz/components/Explorer"
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>
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> export const mapFn: Options["mapFn"] = (node) => {
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> // implement your function here
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> }
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> export const filterFn: Options["filterFn"] = (node) => {
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> // implement your function here
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> }
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> export const sortFn: Options["sortFn"] = (a, b) => {
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> // implement your function here
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> }
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>
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> Component.Explorer({
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> // ... your other options
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> mapFn,
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> filterFn,
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> sortFn,
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> })
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> ```
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### Add emoji prefix
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To add emoji prefixes (📁 for folders, 📄 for files), you could use a map function like this:
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```ts title="quartz.layout.ts"
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Component.Explorer({
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mapFn: (node) => {
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if (node.isFolder) {
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node.displayName = "📁 " + node.displayName
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} else {
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node.displayName = "📄 " + node.displayName
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}
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},
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})
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```
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