import { Keyframes } from '../../_util/cssinjs';
import { initMotion } from './motion';
export const fadeIn = new Keyframes('antFadeIn', {
  '0%': {
    opacity: 0
  },
  '100%': {
    opacity: 1
  }
});
export const fadeOut = new Keyframes('antFadeOut', {
  '0%': {
    opacity: 1
  },
  '100%': {
    opacity: 0
  }
});
export const initFadeMotion = (token, sameLevel = false) => {
  const {
    antCls
  } = token;
  const motionCls = `${antCls}-fade`;
  const sameLevelPrefix = sameLevel ? '&' : '';
  return [initMotion(motionCls, fadeIn, fadeOut, token.motionDurationMid, sameLevel), {
    [`
        ${sameLevelPrefix}${motionCls}-enter,
        ${sameLevelPrefix}${motionCls}-appear
      `]: {
      opacity: 0,
      animationTimingFunction: 'linear'
    },
    [`${sameLevelPrefix}${motionCls}-leave`]: {
      animationTimingFunction: 'linear'
    }
  }];
};