@sentry/nextjs/esm/common/utils/commonObjectTracing.js

Official Sentry SDK for Next.js

const commonMap = new WeakMap();

/**
 * Takes a shared (garbage collectable) object between resources, e.g. a headers object shared between Next.js server components and returns a common propagation context.
 */
function commonObjectToPropagationContext(
  commonObject,
  propagationContext,
) {
  if (typeof commonObject === 'object' && commonObject) {
    const memoPropagationContext = commonMap.get(commonObject);
    if (memoPropagationContext) {
      return memoPropagationContext;
    } else {
      commonMap.set(commonObject, propagationContext);
      return propagationContext;
    }
  } else {
    return propagationContext;
  }
}

export { commonObjectToPropagationContext };
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