vant-weapp/packages/goods-action/index.ts

import { VantComponent } from '../common/component';

VantComponent({
  relation: {
    type: 'descendant',
    name: 'goods-action-button',
    current: 'goods-action',
    linked() {
      this.updateStyle();
    },
    unlinked() {
      this.updateStyle();
    },
    linkChanged() {
      this.updateStyle();
    },
  },
  props: {
    safeAreaInsetBottom: {
      type: Boolean,
      value: true,
    },
  },

  methods: {
    updateStyle() {
      wx.nextTick(() => {
        this.children.forEach(
          (child: WechatMiniprogram.Component.TrivialInstance) => {
            child.updateStyle();
          }
        );
      });
    },
  },
});