Skip to content

Add support for afterTransform hook #15

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Jan 26, 2022
Merged

Add support for afterTransform hook #15

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
4b8e7ae
Add options.afterTransform
danistefanovic Jan 25, 2022
1a729b6
Replace optional chaining (not supported on lts/erbium)
danistefanovic Jan 25, 2022
6a25c14
Improve code style and documentation
danistefanovic Jan 25, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
37 changes: 24 additions & 13 deletions lib/index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -12,12 +12,14 @@
* @property {boolean} [fragment=false] Whether a DOM fragment should be returned
* @property {Document} [document] Document interface to use (default: `globalThis.document`)
* @property {string} [namespace] `namespace` to use to create elements
* @property {(node: HastNode, transformed: Node) => void} [afterTransform] Callback invoked after each node transformation
*
* @typedef Context
* @property {Document} doc
* @property {boolean} [fragment=false]
* @property {string} [namespace]
* @property {string} [impliedNamespace]
* @property {Options['afterTransform']} [afterTransform]
*/

import {webNamespaces} from 'web-namespaces'
Expand All @@ -30,19 +32,28 @@ import {find, html, svg} from 'property-information'
* @param {Context} ctx
*/
function transform(node, ctx) {
switch (node.type) {
case 'root':
return root(node, ctx)
case 'text':
return text(node, ctx)
case 'element':
return element(node, ctx)
case 'doctype':
return doctype(node, ctx)
case 'comment':
return comment(node, ctx)
default:
return element(node, ctx)
const transformed = transformer(node)
if (ctx.afterTransform) ctx.afterTransform(node, transformed)
return transformed

/**
* @param {HastNode} node
*/
function transformer(node) {
switch (node.type) {
case 'root':
return root(node, ctx)
case 'text':
return text(node, ctx)
case 'element':
return element(node, ctx)
case 'doctype':
return doctype(node, ctx)
case 'comment':
return comment(node, ctx)
default:
return element(node, ctx)
}
}
}

Expand Down
4 changes: 4 additions & 0 deletions readme.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,10 @@ Document interface to use (default: `globalThis.document`).

`namespace` to use to create [*elements*][element].

###### `options.afterTransform(node, transformed)`

Callback invoked after each node transformation (`Function`).

## Security

Use of `hast-util-to-dom` can open you up to a
Expand Down
19 changes: 19 additions & 0 deletions test/index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -359,6 +359,25 @@ test('hast-util-to-dom', (t) => {
'encodes data properties when string'
)

t.deepEqual(
(() => {
/** @type {Array<[HastNode, string]>} */
const calls = []
toDom(h('html', [h('title', 'Hi')]), {
afterTransform: (node, transformed) => {
calls.push([node, serializeNodeToHtmlString(transformed)])
}
})
return calls
})(),
[
[{type: 'text', value: 'Hi'}, 'Hi'],
[h('title', 'Hi'), '<title>Hi</title>'],
[h('html', [h('title', 'Hi')]), '<html><title>Hi</title></html>']
],
'should invoke afterTransform'
)

t.end()
})

Expand Down