processUpdateQueue() — react Function Reference

Architecture documentation for the processUpdateQueue() function in ReactFizzClassComponent.js from the react codebase.

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Entity Profile

BabelCompiler→ Validation→ processUpdateQueue() — react Function Reference

Dependency Diagram

graph TD
  bd96449d_3822_0ea5_878f_70fab765cc32["processUpdateQueue()"]
  8f850c79_0562_f37f_80ff_563c50cd0996["ReactFizzClassComponent.js"]
  bd96449d_3822_0ea5_878f_70fab765cc32 -->|defined in| 8f850c79_0562_f37f_80ff_563c50cd0996
  214e29b1_8411_c0df_65fc_dabe157ff86e["mountClassInstance()"]
  214e29b1_8411_c0df_65fc_dabe157ff86e -->|calls| bd96449d_3822_0ea5_878f_70fab765cc32
  style bd96449d_3822_0ea5_878f_70fab765cc32 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-server/src/ReactFizzClassComponent.js lines 586–623

function processUpdateQueue(
  internalInstance: InternalInstance,
  inst: any,
  props: any,
  maskedLegacyContext: any,
): void {
  if (internalInstance.queue !== null && internalInstance.queue.length > 0) {
    const oldQueue = internalInstance.queue;
    const oldReplace = internalInstance.replace;
    internalInstance.queue = null;
    internalInstance.replace = false;

    if (oldReplace && oldQueue.length === 1) {
      inst.state = oldQueue[0];
    } else {
      let nextState = oldReplace ? oldQueue[0] : inst.state;
      let dontMutate = true;
      for (let i = oldReplace ? 1 : 0; i < oldQueue.length; i++) {
        const partial = oldQueue[i];
        const partialState =
          typeof partial === 'function'
            ? partial.call(inst, nextState, props, maskedLegacyContext)
            : partial;
        if (partialState != null) {
          if (dontMutate) {
            dontMutate = false;
            nextState = assign({}, nextState, partialState);
          } else {
            assign(nextState, partialState);
          }
        }
      }
      inst.state = nextState;
    }
  } else {
    internalInstance.queue = null;
  }
}