vant/packages/submit-bar/index.js

import { use, noop } from '../utils';
import Button from '../button';

const [sfc, bem, t] = use('submit-bar');

export default sfc(
  {
    props: {
      tip: String,
      label: String,
      loading: Boolean,
      disabled: Boolean,
      buttonText: String,
      price: {
        type: Number,
        default: null
      },
      currency: {
        type: String,
        default: '¥'
      },
      buttonType: {
        type: String,
        default: 'danger'
      }
    },

    render(h, context, inherit) {
      const { props, listeners } = context;
      const { tip, price } = props;
      const slots = context.slots();
      const hasPrice = typeof price === 'number';

      return (
        <div class={bem()} {...inherit}>
          {slots.top}
          {(slots.tip || tip) && (
            <div class={bem('tip')}>
              {tip}
              {slots.tip}
            </div>
          )}
          <div class={bem('bar')}>
            {slots.default}
            <div class={bem('text')}>
              {hasPrice && [
                <span>{props.label || t('label')}</span>,
                <span class={bem('price')}>{`${props.currency} ${(price / 100).toFixed(2)}`}</span>
              ]}
            </div>
            <Button
              square
              size="large"
              type={props.buttonType}
              loading={props.loading}
              disabled={props.disabled}
              text={props.loading ? '' : props.buttonText}
              onClick={listeners.submit || noop}
            />
          </div>
        </div>
      );
    }
  },
  true
);