Function startRegisterOrChunk

src/runtime.js:312–328

* @param {!Window} global Global scope to adopt. * @param {function(!Object, !Object)|!ExtensionPayload} fnOrStruct * @param {function()} register

(global, fnOrStruct, register)

 * @param {function()} register
 */
function startRegisterOrChunk(global, fnOrStruct, register) {
  if (typeof fnOrStruct == 'function' || fnOrStruct.p == 'high') {
    // "High priority" extensions do not go through chunking.
    // This should be used for extensions that need to run early.
    // One example would be viewer communication that is required
    // to transition document from pre-render to visible (which
    // affects chunking itself).
    // We consider functions as high priority, because
    // - if in doubt, that is a better default
    // - the only actual  user is a viewer integration that should
    //   be high priority.
    Promise.resolve().then(register);
  } else {
    register.displayName = fnOrStruct.n;
    startupChunk(global.document, register);
  }
}

/**
 * Applies the runtime to a given global scope for a single-doc mode.