removeEmptyText.js•1.29 kB
'use strict';
const { detachNodeFromParent } = require('../lib/xast.js');
exports.name = 'removeEmptyText';
exports.description = 'removes empty <text> elements';
/**
* Remove empty Text elements.
*
* @see https://www.w3.org/TR/SVG11/text.html
*
* @example
* Remove empty text element:
* <text/>
*
* Remove empty tspan element:
* <tspan/>
*
* Remove tref with empty xlink:href attribute:
* <tref xlink:href=""/>
*
* @author Kir Belevich
*
* @type {import('./plugins-types').Plugin<'removeEmptyText'>}
*/
exports.fn = (root, params) => {
const { text = true, tspan = true, tref = true } = params;
return {
element: {
enter: (node, parentNode) => {
// Remove empty text element
if (text && node.name === 'text' && node.children.length === 0) {
detachNodeFromParent(node, parentNode);
}
// Remove empty tspan element
if (tspan && node.name === 'tspan' && node.children.length === 0) {
detachNodeFromParent(node, parentNode);
}
// Remove tref with empty xlink:href attribute
if (
tref &&
node.name === 'tref' &&
node.attributes['xlink:href'] == null
) {
detachNodeFromParent(node, parentNode);
}
},
},
};
};