c3/es6_modules/chart/api.chart.js

import {
    CLASS,
    isValue,
    isFunction,
    isString,
    isUndefined,
    isDefined,
    ceil10,
    asHalfPixel,
    diffDomain,
    isEmpty,
    notEmpty,
    getOption,
    hasValue,
    sanitise,
    getPathBox,
    ChartInternal
} from '../chartinternal.js';

const resize = function (size) {
    let $$ = this.internal, config = $$.config;
    config.size_width = size ? size.width : null;
    config.size_height = size ? size.height : null;
    this.flush();
};

const flush = function () {
    const $$ = this.internal;
    $$.updateAndRedraw({ withLegend: true, withTransition: false, withTransitionForTransform: false });
};

const destroy = function () {
    const $$ = this.internal;

    window.clearInterval($$.intervalForObserveInserted);

    if ($$.resizeTimeout !== undefined) {
        window.clearTimeout($$.resizeTimeout);
    }

    if (window.detachEvent) {
        window.detachEvent('onresize', $$.resizeFunction);
    } else if (window.removeEventListener) {
        window.removeEventListener('resize', $$.resizeFunction);
    } else {
        const wrapper = window.onresize;
        // check if no one else removed our wrapper and remove our resizeFunction from it
        if (wrapper && wrapper.add && wrapper.remove) {
            wrapper.remove($$.resizeFunction);
        }
    }

    $$.selectChart.classed('c3', false).html('');

    // MEMO: this is needed because the reference of some elements will not be released,
    // then memory leak will happen.
    Object.keys($$).forEach((key) => {
        $$[key] = null;
    });

    return null;
};

export { resize, flush, destroy };