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Next.js 70.65s

Quick Tip: Draft Posts using Computed Data

Here’s a quick snippet that shows how to combine Eleventy’s Configuration API Global Data and Computed Data features in your Eleventy Configuration file to implement a simple drafts feature for any piece of content.

Set draft: true anywhere in a file’s data cascade and that file will be only be built when using Eleventy in --serve or --watch modes. It will be excluded from full Eleventy builds.

You might imagine how this could be extended to add a publishing date feature too: to exclude content from builds before a specific date set in a post’s front matter (or elsewhere in the data cascade).

Filename .eleventy.js
module.exports = function (eleventyConfig) {
	// When `permalink` is false, the file is not written to disk
	eleventyConfig.addGlobalData("eleventyComputed.permalink", function () {
		return (data) => {
			// Always skip during non-watch/serve builds
			if (data.draft && !process.env.BUILD_DRAFTS) {
				return false;
			}

			return data.permalink;
		};
	});

	// When `eleventyExcludeFromCollections` is true, the file is not included in any collections
	eleventyConfig.addGlobalData(
		"eleventyComputed.eleventyExcludeFromCollections",
		function () {
			return (data) => {
				// Always exclude from non-watch/serve builds
				if (data.draft && !process.env.BUILD_DRAFTS) {
					return true;
				}

				return data.eleventyExcludeFromCollections;
			};
		}
	);

	eleventyConfig.on("eleventy.before", ({ runMode }) => {
		// Set the environment variable
		if (runMode === "serve" || runMode === "watch") {
			process.env.BUILD_DRAFTS = true;
		}
	});
};