How to use the @open-wc/building-utils/index-html/loader-script.js.createPolyfillsLoaderScript function in @open-wc/building-utils

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github open-wc / open-wc / packages / karma-esm / src / test-loader-browser-script.js View on Github external
function createTestLoaderBrowserScript(compatibilityMode, polyfills, importMap) {
  const loadPolyfillsWithFeatureDetectionScript = createPolyfillsLoaderScript(
  // polyfills without a test don't require feature detection and are not included in the generic loader scriptˆ
  const polyfillsWithoutFeatureDetection = polyfills.filter(p => !p.test);

  // load core-js separately so that we can use Promise in the loader
  const indexOfCoreJs = polyfillsWithoutFeatureDetection.findIndex(p => === 'core-js');
  const coreJs =
    indexOfCoreJs === -1 ? null : polyfillsWithoutFeatureDetection.splice(indexOfCoreJs, 1)[0];

  const polyfillsWithoutFeatureDetectionString = polyfillsWithoutFeatureDetection
    .map(p => `{ tagName: 'script', props: { src: '/polyfills/${}.${p.hash}.js', noModule: ${Boolean(p.nomodule)} } }`)