felixarntz/theme-boilerplate

/**
 * File debounce.js.
 *
 * Exports a function to debounce functionality.
 */

export default function debounce( func, wait, immediate ) {
    let timeout;

    return () => {
        const context = this;
        const args    = arguments;
        const later   = () => {
            timeout = null;
            if ( ! immediate ) {
                func.apply( context, args );
            }
        };
        const callNow = immediate && ! timeout;

        clearTimeout( timeout );
        timeout = setTimeout( later, wait );

        if ( callNow ) {
            func.apply( context, args );
        }
    };
}