doctype
Version:
Information for HTML doctypes
103 lines (95 loc) • 3.57 kB
JavaScript
export const doctypes = {
'HTML 5': 'html',
'HTML 4.01 Strict':
'HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"',
'HTML 4.01 Transitional':
'HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"',
'HTML 4.01 Frameset':
'HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd"',
'HTML 3.2': 'HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"',
'HTML 2.0': 'HTML PUBLIC "-//IETF//DTD HTML//EN"',
'XHTML 1.0 Strict':
'html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"',
'XHTML 1.0 Transitional':
'html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"',
'XHTML 1.0 Frameset':
'html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"',
'XHTML 1.1':
'html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"',
'XHTML Basic 1.1':
'html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd"',
'XHTML Basic 1.0':
'html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd"',
'MathML 2.0':
'math PUBLIC "-//W3C//DTD MathML 2.0//EN" "http://www.w3.org/Math/DTD/mathml2/mathml2.dtd"',
'MathML 1.01': 'math SYSTEM "http://www.w3.org/Math/DTD/mathml1/mathml.dtd"',
'SVG 1.0':
'svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd"',
'SVG 1.1 Full':
'svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"',
'SVG 1.1 Basic':
'svg PUBLIC "-//W3C//DTD SVG 1.1 Basic//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd"',
'SVG 1.1 Tiny':
'svg PUBLIC "-//W3C//DTD SVG 1.1 Tiny//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd"'
}
// Gather all doctypes as shortcodes.
const own = {}.hasOwnProperty
/** @type {Record<string, string>} */
const shortcodes = gather()
// Ensure proper non-versioned types work:
shortcodes.h = shortcodes.h5
shortcodes.s = shortcodes['s1.1f']
shortcodes.m = shortcodes.m2
shortcodes.x = shortcodes['x1.1']
/**
* Get a doctype from a name.
*
* @param {number|string} name
* Fuzzy doctype name which is stripped from white space, casing, fractional
* part of version, `'HTML'` or `'XHTML'` prefix, and whose suffixes are
* normalised (`Transitional` to `t`).
* @returns {string|null}
* Doctype string when found.
*/
export function doctype(name) {
const key = cleanDoctype(name)
const html = 'h' + key
return own.call(shortcodes, key)
? shortcodes[key]
: own.call(shortcodes, html)
? shortcodes[html]
: null
}
// Clean all doctypes.
function gather() {
/** @type {Record<string, string>} */
const codes = {}
/** @type {keyof doctypes} */
let key
for (key in doctypes) {
if (own.call(doctypes, key)) {
codes[cleanDoctype(key)] = doctypes[key]
}
}
return codes
}
/**
* Clean and simplify a doctype name.
*
* @param {string|number} name
* @returns {string}
*/
function cleanDoctype(name) {
return String(name)
.toLowerCase()
.replace(/([a-z]+|\d+)/, ' $1 ')
.replace(/\.0+(?!\d)/, '')
.replace(/\.01/, '')
.replace(/\.2/, '')
.replace(
/\b(?:xhtml|html|mathml|svg|full|basic|tiny|strict|frameset)\b/g,
($0) => $0.charAt(0)
)
.replace(/ t(?:ransitional)?/, '')
.replace(/\s+/g, '')
}