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eleventy.config.pagination.js
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eleventy.config.pagination.js
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const PAGE_PREFIX = "page-";
const chunk = (arr, size) => Array.from({ length: Math.ceil(arr.length / size) }, (v, i) => arr.slice(i * size, i * size + size));
const paginatedUrl = (url, pageNumber) => {
if (pageNumber === 1) {
return url;
}
const trimmedUrl = url.endsWith("/") ? url.slice(0, -1) : url;
return `${trimmedUrl}/page-${pageNumber}/`;
};
module.exports = (eleventyConfig) => {
eleventyConfig.addFilter("paginatedUrl", (url, pageNumber) => {
return paginatedUrl(url, pageNumber);
});
eleventyConfig.addFilter("buildPagination", (pagination, url) => {
const filteredHrefs = pagination.hrefs.filter((href) => href.startsWith(url));
const pageCount = filteredHrefs.length;
const pageNumber = filteredHrefs.findIndex((href) => href === pagination.hrefs[pagination.pageNumber]);
const currentPageNumber = pageNumber + 1;
return {
pageNumber: pageNumber,
hrefs: filteredHrefs,
href: {
next: currentPageNumber < pageCount ? paginatedUrl(url, currentPageNumber + 1) : "",
previous: currentPageNumber > 1 ? paginatedUrl(url, currentPageNumber - 1) : "",
first: url,
last: pageCount > 1 ? paginatedUrl(url, pageCount) : url,
},
};
});
eleventyConfig.addFilter("paginateCollectionTags", function paginateCollection(collection, paginationSize) {
collection.sort(function (a, b) {
return b.date - a.date; // sort by date - descending
});
const entryTags = collection.map((entry) => entry.data.tags).flat();
let tagMap = [];
eleventyConfig
.getFilter("filterTagList")(entryTags)
.filter((tag, index, tags) => tags.indexOf(tag) === index)
.forEach((tag) => {
const tagEntries = collection.filter((entry) => entry.data.tags.includes(tag));
const pagedTagEntries = chunk(tagEntries, paginationSize);
pagedTagEntries.forEach((pagedItem, pageNumber) => {
tagMap.push({
tagName: tag,
pageNumber: pageNumber,
pageData: pagedTagEntries[pageNumber],
});
});
});
return tagMap;
});
eleventyConfig.addGlobalData("pagePrefix", PAGE_PREFIX);
};