vant/packages/tag/index.js

import { use } from '../utils';
import { RED, BLUE, GREEN, GRAY_DARK } from '../utils/color';

const [sfc, bem] = use('tag');

const COLOR_MAP = {
  danger: RED,
  primary: BLUE,
  success: GREEN
};

export default sfc(
  {
    props: {
      size: String,
      type: String,
      mark: Boolean,
      color: String,
      plain: Boolean,
      round: Boolean,
      textColor: String
    },

    render(h, context) {
      const { props } = context;
      const { mark, plain, round, size } = context.props;

      const color = props.color || COLOR_MAP[props.type] || GRAY_DARK;
      const key = plain ? 'color' : 'backgroundColor';
      const style = { [key]: color };

      if (props.textColor) {
        style.color = props.textColor;
      }

      return (
        <span
          style={style}
          class={[
            bem({ mark, plain, round, [size]: size }),
            {
              'van-hairline--surround': plain
            }
          ]}
          {...context.data}
        >
          {context.children}
        </span>
      );
    }
  },
  true
);