Files F97812013

index.js
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Created: Mon, Jan 6, 14:50

index.js
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	const {
	html,
	oneLineTrim,
	TemplateTag,
	trimResultTransformer,
	replaceResultTransformer
	} = require('common-tags')

	function template(ctx) {
	const {
	publicPath,
	css,
	js,
	lang,
	title,
	favicon,
	container,
	head = {},
	body = {},
	attrs = {},
	trimWhitespace
	} = ctx

	const doc = html`
	<!DOCTYPE html>
	${lang ? `<html lang="${lang}">` : '<html>'}
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>${title \|\| 'sample-app'}</title>
	${favicon && `<link rel="icon" type="image/x-icon" href="${favicon}">`}
	${generateTags(head.meta, 'meta')}
	${generateTags(head.links, 'link')}
	${generateTags(head.style, 'style')}
	${generateTags(head.scripts, 'script')}
	${generateRawTags(head.raw)}
	${webpackArtifacts(css, publicPath, attrs.css, 'link')}
	</head>
	<body>
	${container && `<div id="${container}"></div>`}
	${generateRawTags(body.raw)}
	${generateTags(body.scripts, 'script')}
	${webpackArtifacts(js, publicPath, attrs.js, 'script')}
	</body>
	</html>`

	return trimWhitespace ? oneLineTrim(doc) : emptyLineTrim(doc)
	}

	function mapAttrs(tag) {
	return Object.keys(tag)
	.map(attr => `${attr}="${tag[attr]}"`)
	.join(' ')
	}

	function generateTags(tags = [], type) {
	const closing = type === ('script' \|\| 'style') ? `></${type}>` : '>'
	return tags.map(tag => `<${type} ${mapAttrs(tag)}${closing}`)
	}

	function generateRawTags(tags = []) {
	if (typeof tags === 'string' \|\| tags instanceof String) {
	return tags
	}
	return tags.map(tag => tag)
	}

	function webpackArtifacts(files = [], publicPath = '', attrs = {}, type) {
	const tag = file =>
	type === 'script'
	? Object.assign(attrs, { src: publicPath + file })
	: Object.assign(attrs, { rel: 'stylesheet', href: publicPath + file })

	return files.map(file => generateTags([tag(file)], type)).join('\n')
	}

	const emptyLineTrim = new TemplateTag(
	replaceResultTransformer(/^\s*[\r\n]/gm, ''),
	trimResultTransformer
	)

	module.exports = template

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