removeScriptElement.js•1.84 kB
'use strict';
const { detachNodeFromParent } = require('../lib/xast.js');
const { attrsGroups } = require('./_collections.js');
exports.name = 'removeScriptElement';
exports.description = 'removes scripts (disabled by default)';
/** Union of all event attributes. */
const eventAttrs = [
...attrsGroups.animationEvent,
...attrsGroups.documentEvent,
...attrsGroups.documentElementEvent,
...attrsGroups.globalEvent,
...attrsGroups.graphicalEvent,
];
/**
* Remove scripts.
*
* https://www.w3.org/TR/SVG11/script.html
*
* @author Patrick Klingemann
* @type {import('./plugins-types').Plugin<'removeScriptElement'>}
*/
exports.fn = () => {
return {
element: {
enter: (node, parentNode) => {
if (node.name === 'script') {
detachNodeFromParent(node, parentNode);
return;
}
for (const attr of eventAttrs) {
if (node.attributes[attr] != null) {
delete node.attributes[attr];
}
}
},
exit: (node, parentNode) => {
if (node.name !== 'a') {
return;
}
for (const attr of Object.keys(node.attributes)) {
if (attr === 'href' || attr.endsWith(':href')) {
if (
node.attributes[attr] == null ||
!node.attributes[attr].trimStart().startsWith('javascript:')
) {
continue;
}
const index = parentNode.children.indexOf(node);
parentNode.children.splice(index, 1, ...node.children);
// TODO remove legacy parentNode in v4
for (const child of node.children) {
Object.defineProperty(child, 'parentNode', {
writable: true,
value: parentNode,
});
}
}
}
},
},
};
};