'use strict'; const BasePlugin = require('../plugin'); const { IE_6 } = require('../dictionary/browsers'); const { PROPERTY } = require('../dictionary/identifiers'); const { DECL } = require('../dictionary/postcss'); /** * @param {string} prop * @return {string} */ function vendorPrefix(prop) { let match = prop.match(/^(-\w+-)/); if (match) { return match[0]; } return ''; } module.exports = class LeadingUnderscore extends BasePlugin { /** @param {import('postcss').Result=} result */ constructor(result) { super([IE_6], [DECL], result); } /** * @param {import('postcss').Declaration} decl * @return {void} */ detect(decl) { const { before } = decl.raws; if (before && before.includes('_')) { this.push(decl, { identifier: PROPERTY, hack: `${before.trim()}${decl.prop}`, }); } if ( decl.prop[0] === '-' && decl.prop[1] !== '-' && vendorPrefix(decl.prop) === '' ) { this.push(decl, { identifier: PROPERTY, hack: decl.prop, }); } } };