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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| import matchHelper from "posthtml-match-helper"; | ||
| import debugUtil from "debug"; | ||
|
|
||
| const debug = debugUtil("Eleventy:Bundle"); | ||
|
|
||
| const ATTRS = { | ||
| keep: "eleventy:keep" | ||
| } | ||
|
|
||
| function getTextNodeContent(node) { | ||
| if (!node.content) { | ||
| return ""; | ||
| } | ||
|
|
||
| return node.content | ||
| .map((entry) => { | ||
| if (typeof entry === "string") { | ||
| return entry; | ||
| } | ||
| if (Array.isArray(entry.content)) { | ||
| return getTextNodeContent(entry); | ||
| } | ||
| return ""; | ||
| }) | ||
| .join(""); | ||
| } | ||
|
|
||
| function eleventyPruneEmptyBundles(eleventyConfig, options = {}) { | ||
| // Right now script[src],link[rel="stylesheet"] nodes are removed if the final bundles are empty. | ||
| // `false` to disable | ||
| options.pruneEmptySelector = options.pruneEmptySelector ?? `style,script,link[rel="stylesheet"]`; | ||
|
|
||
| // `false` disables this plugin | ||
| if(options.pruneEmptySelector === false) { | ||
| return; | ||
| } | ||
|
|
||
| if(!eleventyConfig.htmlTransformer || !eleventyConfig.htmlTransformer?.constructor?.SUPPORTS_PLUGINS_ENABLED_CALLBACK) { | ||
| debug("You will need to upgrade your version of Eleventy core to remove empty bundle tags automatically (v3 or newer)."); | ||
| return; | ||
| } | ||
|
|
||
| eleventyConfig.htmlTransformer.addPosthtmlPlugin( | ||
| "html", | ||
| function (pluginOptions = {}) { | ||
| return function (tree) { | ||
| tree.match(matchHelper(options.pruneEmptySelector), function (node) { | ||
| if(node.attrs && node.attrs[ATTRS.keep] !== undefined) { | ||
| delete node.attrs[ATTRS.keep]; | ||
| return node; | ||
| } | ||
|
|
||
| // <link rel="stylesheet" href=""> | ||
| if(node.tag === "link") { | ||
| if(node.attrs?.rel === "stylesheet" && (node.attrs?.href || "").trim().length === 0) { | ||
| return false; | ||
| } | ||
| } else { | ||
| let content = getTextNodeContent(node); | ||
|
|
||
| if(!content) { | ||
| // <script></script> or <script src=""></script> | ||
| if(node.tag === "script" && (node.attrs?.src || "").trim().length === 0) { | ||
| return false; | ||
| } | ||
|
|
||
| // <style></style> | ||
| if(node.tag === "style") { | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
|
|
||
|
|
||
| return node; | ||
| }); | ||
| }; | ||
| }, | ||
| { | ||
| // the `enabled` callback for plugins is available on v3.0.0-alpha.20+ and v3.0.0-beta.2+ | ||
| enabled: () => { | ||
| return Object.keys(eleventyConfig.getBundleManagers()).length > 0; | ||
| } | ||
| } | ||
| ); | ||
| } | ||
|
|
||
| export default eleventyPruneEmptyBundles; |
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