Function insertBeforeSourceMappingURL

tools/lib/patch.js:123–127

(src, injection)

}

function insertBeforeSourceMappingURL(src, injection) {
  const idx = src.lastIndexOf("\n//# sourceMappingURL=");
  if (idx < 0) return src + injection;
  return src.slice(0, idx) + injection + src.slice(idx);
}

function findExportedFactoryVar(src, exportName) {
  const name = String(exportName || "").trim();