Transform HAST to Parse5’s AST.
npm:
npm install hast-util-from-parse5Say we have the following file, example.html:
<!doctype html><title>Hello!</title><h1 id="world">World!<!--after-->And our script, example.js, looks as follows:
var vfile = require('to-vfile')
var parse5 = require('parse5')
var inspect = require('unist-util-inspect')
var fromParse5 = require('hast-util-from-parse5')
var doc = vfile.readSync('example.html')
var ast = parse5.parse(String(doc), {sourceCodeLocationInfo: true})
var hast = fromParse5(ast, doc)
console.log(inspect(hast))Now, running node example yields:
root[2] (1:1-2:1, 0-70) [data={"quirksMode":false}]
├─ doctype (1:1-1:16, 0-15) [name="html"]
└─ element[2] [tagName="html"]
├─ element[1] [tagName="head"]
│ └─ element[1] (1:16-1:37, 15-36) [tagName="title"]
│ └─ text: "Hello!" (1:23-1:29, 22-28)
└─ element[1] [tagName="body"]
└─ element[3] (1:37-2:1, 36-70) [tagName="h1"][properties={"id":"world"}]
├─ text: "World!" (1:52-1:58, 51-57)
├─ comment: "after" (1:58-1:70, 57-69)
└─ text: "\n" (1:70-2:1, 69-70)
Transform an ASTNode to a HAST Node.
If options is a VFile, it’s treated as {file: options}.
Whether the root of the given tree is in the 'html' or 'svg' space (enum,
'svg' or 'html', default: 'html').
If an element in with the SVG namespace is found in ast, fromParse5
automatically switches to the SVG space when entering the element, and
switches back when leaving.
Virtual file, used to add positional information to HAST nodes. If given, the file should have the original HTML source as its contents.
Whether to add positional information about starting tags, closing tags,
and attributes to elements (boolean, default: false). Note: not used
without file.
For the following HTML:
<img src="http://example.com/fav.ico" alt="foo" title="bar">The verbose info would looks as follows:
{
type: 'element',
tagName: 'img',
properties: {
src: 'http://example.com/fav.ico',
alt: 'foo',
title: 'bar'
},
children: [],
data: {
position: {
opening: {
start: {line: 1, column: 1, offset: 0},
end: {line: 1, column: 61, offset: 60}
},
closing: null,
properties: {
src: {
start: {line: 1, column: 6, offset: 5},
end: {line: 1, column: 38, offset: 37}
},
alt: {
start: {line: 1, column: 39, offset: 38},
end: {line: 1, column: 48, offset: 47}
},
title: {
start: {line: 1, column: 49, offset: 48},
end: {line: 1, column: 60, offset: 59}
}
}
}
},
position: {
start: {line: 1, column: 1, offset: 0},
end: {line: 1, column: 61, offset: 60}
}
}See contributing.md in syntax-tree/hast for ways to get
started.
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