Text is encoded even when setting allowDangerousCharacters/allowDangerousHtml about hast-util-to-html HOT 6 CLOSED

Hey! This is a feature. The actual behavior is the expected behavior. text notes should not contain “character references” but the actual characters

from hast-util-to-html.

Any suggestions on how I can avoid this behaviour.

I was converting an svg to hast, doing some processing and then turning it back to an svg with your library. The text nodes are already html encoded, I just want to preserve that and. The extra encoding step mangles them.

from hast-util-to-html.

There should not be an extra encoding step. I need to see your code if I’m going to be able to help you.

from hast-util-to-html.

Well here is an example in node

import { parse } from 'svg-parser';
import { toHtml } from 'hast-util-to-html';

let svg = '<text x="243" y="326" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">-&#xa;</text>'
let hast = parse(svg)

console.log(svg)
console.log(JSON.stringify(hast, null, 4))
console.log(toHtml(hast, {space: 'svg', allowDangerousCharacters: true, allowDangerousHtml: true}))

npm install esm svg-parser hast-util-to-html
node -r esm demo.js

This gives the output

<text x="243" y="326" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">-&#xa;</text>
{
    "type": "root",
    "children": [
        {
            "type": "element",
            "tagName": "text",
            "properties": {
                "x": 243,
                "y": 326,
                "fill": "#000000",
                "font-family": "Helvetica",
                "font-size": "12px",
                "text-anchor": "middle"
            },
            "children": [
                {
                    "type": "text",
                    "value": "-&#xa;"
                }
            ]
        }
    ]
}
<text x="243" y="326" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">-&#x26;#xa;</text>

That text node is taken out of a much larger and compliant svg file, but this is enought to demonstrate the problem.

from hast-util-to-html.

svg-parser is unfortunately not compliant. It says it produces hast but it doesn‘t. This is a bug there.

rehype-parse can mostly parse SVG well (though it is an HTML parser, so is lenient with its input)

xast-util-from-xml is an actual XML parser (SVG is typically in XML format) that produces an XML specific AST: https://github.com/syntax-tree/xast-util-from-xml.

from hast-util-to-html.

BTW it’s not recommended to use such character references in XML. If you have any control over the input, I’d recommend to change it to the actual character (a line ending right?)

from hast-util-to-html.