ng-zorro-antd-mobile/esm2015/core/util/velocity.js

An enterprise-class mobile UI components based on Ant Design and Angular

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,uselessCode} checked by tsc
 */
/**
 * @return {?}
 */
export function getVelocity() {
    return ((minInterval = 30, maxInterval = 100) => {
        /** @type {?} */
        let _time = 0;
        /** @type {?} */
        let _y = 0;
        /** @type {?} */
        let _velocity = 0;
        /** @type {?} */
        const recorder = {
            record: (y) => {
                /** @type {?} */
                const now = +new Date();
                _velocity = (y - _y) / (now - _time);
                if (now - _time >= minInterval) {
                    _velocity = now - _time <= maxInterval ? _velocity : 0;
                    _y = y;
                    _time = now;
                }
            },
            getVelocity: (y) => {
                if (y !== _y) {
                    recorder.record(y);
                }
                return _velocity;
            },
        };
        return recorder;
    })();
}

//# sourceMappingURL=data:application/json;base64,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