@mpxjs/webpack-plugin/lib/wxss/runtime/getUrl.js

mpx compile core

module.exports = (url, options) => {
  if (!options) {
    options = {}
  }

  if (!url) {
    return url
  }

  url = String(url.__esModule ? url.default : url)

  // If url is already wrapped in quotes, remove them
  if (/^['"].*['"]$/.test(url)) {
    url = url.slice(1, -1)
  }

  if (options.hash) {
    url += options.hash
  }

  // Should url be wrapped?
  // See https://drafts.csswg.org/css-values-3/#urls
  if (/["'() \t\n]|(%20)/.test(url) || options.needQuotes) {
    return `"${url.replace(/"/g, '\\"').replace(/\n/g, '\\n')}"`
  }

  return url
}