maybeDependency() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/HIR/PropagateScopeDependenciesHIR.ts lines 489–517

  #checkValidDependency(maybeDependency: ReactiveScopeDependency): boolean {
    // ref value is not a valid dep
    if (isRefValueType(maybeDependency.identifier)) {
      return false;
    }

    /*
     * object methods are not deps because they will be codegen'ed back in to
     * the object literal.
     */
    if (isObjectMethodType(maybeDependency.identifier)) {
      return false;
    }

    const identifier = maybeDependency.identifier;
    /*
     * If this operand is used in a scope, has a dynamic value, and was defined
     * before this scope, then its a dependency of the scope.
     */
    const currentDeclaration =
      this.#reassignments.get(identifier) ??
      this.#declarations.get(identifier.declarationId);
    const currentScope = this.currentScope.value;
    return (
      currentScope != null &&
      currentDeclaration !== undefined &&
      currentDeclaration.id < currentScope.range.start
    );
  }