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local h = require "html"
function code_example(source, output)
return h.div {
h.h3 "source",
h.code {h.pre{source}},
h.h3 "output",
h.code {h.pre{output}}
}
end
print(h.html {
h.head {
h.meta{charset = "utf-8"},
h.style{h.raw[[
body {
max-width: 65ch; font-family: sans-serif; margin:auto;
}
]]}
},
h.body {
h.h1[[simple HTML DSL for lua 5.3]],
h.p[[
this library returns a table which, when indexed with the name of
an HTML tag, provides a function which generates a data structure
representing an HTML element. when this data structure is converted
to a string, the corresponding HTML is generated.
]],
h.code[[local h = require "html"]],
h.p[[
calling a tag's function with no arguments produces a self-closing
tag.
]],
code_example([[print(h.hr())]], [[<hr />]]),
h.p[[
calling a tag's function with a single array or value argument
produces a tag with the children provided in the array. non-table
values may appear in the list of children or in its stead. they are
converted to a string an escaped.
]],
code_example(
[[print(h.section{h.h1"foo",h.p"bar"})]],
[[<section><h1>foo</h1><p>bar</p></section>]]
),
h.p[[
calling a tag's function with a single set of key/value pairs as
the argument produces a self-closing tag with attributes
corresponding to the key/value pairs
]],
code_example(
[[print(h.meta{charset = "utf-8"})]],
[[<meta charset="utf-8" />]]
),
h.p[[
calling a tag's function with a set of key/value pairs and then an
array or value as the arguments produces a tag with attributes
corresponding to the key/value pairs.
]],
code_example(
[[print(h.a({href = "https://example.com"}, "foobar"))]],
[[<a href="https://example.com">foobar</a>]]
),
h.p[[
a table used in a list of children must either be generated from
the HTML functions or have a "tohtml" function or a "render"
function, returning HTML structures or HTML source respectively. a
table that is not a set of attributes or an array of element
children may not be used as arguments to an HTML function.
]],
code_example(
[[
local db_record = {name = "foobar", id = 256}
setmetatable(db_record, {
tohtml = function(x)
return h.a(
{href = "https://example.com/" .. x.id}, x.name)
end
})
print(h.p{"search result: ", db_record})
]],
'<p>search result: <a href="https://example.com/256">foobar</a></p>'
),
h.p[[
the `raw` function will insert text verbatim into the HTML,
unescaped.
]],
code_example(
[[
local html_source = "<marquee>hello</marquee>"
print(h.p{html_source})
print(h.p{h.raw(html_source)})
]],
[[
<p><marquee>hello</marquee></p>
<p><marquee>hello</marquee></p>
]]
),
h.p[[
included with this documentation is "example.lua" which produces
this documenation in HTML via the DSL.
]]
}
})
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