import { Component } from "react";
/** React component that asynchronously loads something into state from the props
 * Handles the common case of wanting to load something but having to deal with the complexities
 * of multiple updates, unmounting, componentWillReceiveProps vs componentDidMount, etc.
 * To use, override isLoadNeeded to determine if a prop change requires a load
 * and load to perform load and call setState with callback value.
 * Sets state of loading to true/false appropriately (automatically part of state)
 * DO NOT call setState or reference props in load
 */
export default abstract class AsyncLoadComponent<P, S extends {
    loading: boolean;
}> extends Component<P, S> {
    _mounted: boolean;
    _loadSeqStarted: number;
    _loadSeqCompleted: number;
    constructor(props: P);
    /** Check if mid-loading */
    isLoading: () => S["loading"];
    /** Override to determine if a load is needed. Not called on mounting */
    abstract isLoadNeeded(newProps: P, oldProps: P): boolean;
    /** Call callback with state changes */
    abstract load(props: P, prevProps: P, callback: (stateUpdate: Partial<S>) => void): void;
    /** Call to force load */
    forceLoad(): void;
    _performLoad(newProps: any, oldProps: any): void;
    componentWillMount(): void;
    componentWillReceiveProps(nextProps: any): void;
    componentWillUnmount(): boolean;
}