antd-mini/compiled/wechat/src/TabBar/index.js

antd-mini 是支付宝小程序 UI 组件库，遵循 Ant Design 规范。

import { TabBarDefaultProps } from './props';
import { Component, triggerEvent } from '../_util/simply';
import mixinValue from '../mixins/value';
Component(TabBarDefaultProps, {
    onChange: function (e) {
        var index = e.currentTarget.dataset.index;
        if (index === this.getValue()) {
            return;
        }
        if (!this.isControlled()) {
            this.update(index);
        }
        triggerEvent(this, 'change', index, e);
    },
}, null, [
    mixinValue({
        valueKey: 'current',
        defaultValueKey: 'defaultCurrent',
    }),
]);