The _config file

The configuration file is the _config.ts or _config.js, saved in the site's root directory. If you don't have it yet, see the Installation documentation to learn how to create it.

The minimal required code is:

import lume from "lume/mod.ts";

const site = lume();

export default site;

The lume() function creates a new instance of Lume and exports it. This function accepts an object with the following configuration values:

Basic options

src

This is the directory containing the source files of your site. All files needed to build your site must be here. Files and folders outside this directory won't be included in your site. It's relative to cwd and by default it's . (the same directory), but some people prefer to store the source files in a subfolder like src.

const site = lume({
  src: "./src",
});

You can override the value from the CLI with --src, which is useful if you have different sites in the same directory. For example: deno task lume --src=./src

dest

This is the folder to export the generated site. It's relative to cwd and by default is _site.

const site = lume({
  dest: "./output",
});

You can override the value from the CLI with --dest, which is useful if you want to generate the site without overriding the previous one. For example:deno task lume --dest=./output

emptyDest

By default, Lume will empty the dest folder before the build. You can prevent this by setting this option to false:

const site = lume({
  emptyDest: false,
});

This is useful if you want to combine two or more sites to the same folder. Other use case is for very big sites (with more than 100K pages) that needs to be built in several steps to prevent running out of memory.

location

This is the public URL of the site. It's useful to generate absolute URLs or fix the relative URLs if your site is published under a subdirectory, for example: https://example.com/project-name/. It only accepts an URL object, for example:

const site = lume({
  location: new URL("https://example.com"),
});

This value is ignored by the local server (started with lume --serve), which always uses http://localhost:3000 (or the defined port if you change it).

You can override the value from the CLI with --location, which is useful if you want to build and deploy the site to different locations. For example: deno task lume --location=https://my-site.com/blog/

prettyUrls

By default it's enabled and generates pretty URLs, for example /about-us/ instead of /about-us.html. Set false to disable it.

const site = lume({
  prettyUrls: false, // Disable pretty urls
});

Server options

The server key contains the configuration for the local server. It has the following options:

port

By default, the local server uses port 3000. Use this option to set a different port.

const site = lume({
  server: {
    port: 8000,
  },
});

This value can be overridden from CLI with --port. For example: deno task lume --serve --port=8888

page404

This option allows configuring the HTML page to displayed for 404 errors. By default it is /404.html. If you are building a SPA with dynamic URLs, you may want to change it to /index.html.

const site = lume({
  server: {
    page404: "./not-found.html",
  },
});

open

Set true to automatically open the generated site in your default web browser after starting the local web server.

const site = lume({
  server: {
    open: true,
  },
});

This value can be set from CLI with --open or -o. For example: deno task lume --serve --open

middlewares

Use this option to add middleware to the local web server. There are some middleware options for common needs at lume/middlewares/*, but you can create custom middleware easily. More info in the Server documentation.

import expires from "lume/middlewares/expires.ts";

const site = lume({
  server: {
    middlewares: [
      expires(),
    ],
  },
});

Watcher options

The watcher key contains an object to configure the file watcher, used to watch file changes with lume --serve and lume --watch.

• debounce: The debounce interval (in milliseconds). By default is 100.
• ignore: An array of strings or functions to filter paths ignored by the watcher.

const site = lume({
  watcher: {
    debounce: 10,
    ignore: [
      "./ignored-folder/",
      "./ignored-file.txt",
      (path) => path.endsWith(".foo"), // ignore extension
    ],
  },
});

There are some files and directories that are automatically ignored by the watcher, like .git or .DS_Store.

Components options

The components object allows to configure the components load and output files.

• variable: The variable name used to access to the loaded components.
• cssFile: The file name to export the CSS code of the components.
• jsFile: The file name to export the JS code of the components.

import lume from "lume/mod.ts";

const site = lume({
  components: {
    variable: "comp",
    cssFile: "/components.css",
    jsFile: "/components.js",
  },
});

export default site;