node_modules/stylelint/lib/utils/isStandardSyntaxUrl.cjs

// NOTICE: This file is generated by Rollup. To modify it,
// please instead edit the ESM counterpart and rebuild with Rollup (npm run build).
'use strict';

const hasLessInterpolation = require('./hasLessInterpolation.cjs');
const hasPsvInterpolation = require('./hasPsvInterpolation.cjs');
const hasScssInterpolation = require('./hasScssInterpolation.cjs');
const hasTplInterpolation = require('./hasTplInterpolation.cjs');

const IS_LESS_VARIABLE_IN_URL = /^@@?[\w-]+$/;
const IS_SCSS_VARIABLE_IN_URL = /^[$\s\w+\-,./*'"@#?]+$/;

/**
 * Check whether a URL is standard
 *
 * @param {string} url
 * @returns {boolean}
 */
function isStandardSyntaxUrl(url) {
	if (url.length === 0) {
		return true;
	}

	// Sass interpolation works anywhere
	if (hasScssInterpolation(url) || hasTplInterpolation(url) || hasPsvInterpolation(url)) {
		return false;
	}

	// Inside `'` and `"` work only LESS interpolation
	if ((url.startsWith(`'`) && url.endsWith(`'`)) || (url.startsWith(`"`) && url.endsWith(`"`))) {
		if (hasLessInterpolation(url)) {
			return false;
		}

		return true;
	}

	// Less variable works only at the beginning
	// Check is less variable, allow use '@url/some/path'
	// https://github.com/less/less.js/blob/3.x/lib/less/parser/parser.js#L547
	if (url.startsWith('@') && IS_LESS_VARIABLE_IN_URL.test(url)) {
		return false;
	}

	// In url without quotes scss variable can be everywhere
	// But in this case it is allowed to use only specific characters
	// Also forbidden "/" at the end of url
	if (url.includes('$') && IS_SCSS_VARIABLE_IN_URL.test(url) && !url.endsWith('/')) {
		return false;
	}

	return true;
}

module.exports = isStandardSyntaxUrl;