77 lines
2.3 KiB
JavaScript
77 lines
2.3 KiB
JavaScript
/**
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* Provides the ability to reference external css/js files for the generated html
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* Method source once issues: https://github.com/rollup/plugins/issues/755
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* @param {Array} externals List of external files.
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* The format is: [{ type: 'js', file: '//xxxx1.js', pos: 'before' }, { type: 'css', file: '//xxxx1.css' }]
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*
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* @return {Function} The templae method required by plugin-html
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*/
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export default function htmlTemplate(externals) {
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return ({ attributes, files, meta, publicPath, title }) => {
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let scripts = [...(files.js || [])];
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let links = [...(files.css || [])];
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// externals = [{ type: 'js', file: '//xxxx1.js', pos: 'before' }, { type: 'css', file: '//xxxx1.css' }]
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if (Array.isArray(externals)) {
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const beforeLinks = [];
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const beforeScripts = [];
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externals.forEach((node) => {
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let fileList;
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const isCssFile = node.type === 'css';
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if (node.pos === 'before') {
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fileList = isCssFile ? beforeLinks : beforeScripts;
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} else {
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fileList = isCssFile ? links : scripts;
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}
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fileList.push({ fileName: node.file });
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});
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scripts = beforeScripts.concat(scripts);
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links = beforeLinks.concat(links);
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}
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scripts = scripts
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.map(({ fileName }) => {
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const attrs = makeHtmlAttributes(attributes.script);
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return `<script src="${publicPath}${fileName}"${attrs}></script>`;
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})
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.join('\n');
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links = links
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.map(({ fileName }) => {
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const attrs = makeHtmlAttributes(attributes.link);
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return `<link href="${publicPath}${fileName}" rel="stylesheet"${attrs}>`;
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})
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.join('\n');
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const metas = meta
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.map((input) => {
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const attrs = makeHtmlAttributes(input);
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return `<meta${attrs}>`;
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})
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.join('\n');
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return `
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<!doctype html>
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<html${makeHtmlAttributes(attributes.html)}>
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<head>
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${metas}
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<title>${title}</title>
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${links}
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</head>
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<body>
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${scripts}
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</body>
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</html>`;
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};
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}
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function makeHtmlAttributes(attributes) {
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if (!attributes) {
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return '';
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}
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const keys = Object.keys(attributes);
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// eslint-disable-next-line no-param-reassign
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return keys.reduce((result, key) => (result += ` ${key}="${attributes[key]}"`), '');
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}
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