--- componentes
    --- pages
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<template>
    ....
</template>
<script>
export default {
  props: {
    ...
  },
  data () {
    ....
  },
  methods: {
    ....
  }
}
</script>
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import React, { Component } from 'react';
export default class Demo extends Component {
    state = {
    };

    componentDidMount() {
      ...
    }

    render() {
      const { .... } = this.props;
      return (
        <div>
          ....
        </div>
      );
    }
}
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import * as React from 'react';
import classNames from 'classnames';
import useMergedState from 'rc-util/lib/hooks/useMergedState';
import KeyCode from 'rc-util/lib/KeyCode';

const Switch = React.forwardRef(
  (
    {
      prefixCls = 'rc-switch',
      className,
      checked,
      defaultChecked,
      disabled,
      loadingIcon,
      checkedChildren,
      unCheckedChildren,
      onClick,
      onChange,
      onKeyDown,
      ...restProps
    },
    ref,
  ) => {
    const [innerChecked, setInnerChecked] = useMergedState<boolean>(false, {
      value: checked,
      defaultValue: defaultChecked,
    });

    function triggerChange(
      newChecked: boolean,
      event: React.MouseEvent<HTMLButtonElement> | React.KeyboardEvent<HTMLButtonElement>,
    ) {
      let mergedChecked = innerChecked;

      if (!disabled) {
        mergedChecked = newChecked;
        setInnerChecked(mergedChecked);
        onChange?.(mergedChecked, event);
      }

      return mergedChecked;
    }

    function onInternalKeyDown(e) {
      if (e.which === KeyCode.LEFT) {
        triggerChange(false, e);
      } else if (e.which === KeyCode.RIGHT) {
        triggerChange(true, e);
      }
      onKeyDown?.(e);
    }

    function onInternalClick(e) {
      const ret = triggerChange(!innerChecked, e);
      // [Legacy] trigger onClick with value
      onClick?.(ret, e);
    }

    const switchClassName = classNames(prefixCls, className, {
      [`${prefixCls}-checked`]: innerChecked,
      [`${prefixCls}-disabled`]: disabled,
    });

    return (
      <button
        {...restProps}
        type="button"
        role="switch"
        aria-checked={innerChecked}
        disabled={disabled}
        className={switchClassName}
        ref={ref}
        onKeyDown={onInternalKeyDown}
        onClick={onInternalClick}
      >
        {loadingIcon}
        <span className={`${prefixCls}-inner`}>
          {innerChecked ? checkedChildren : unCheckedChildren}
        </span>
      </button>
    );
  },
);

Switch.displayName = 'Switch';

export default Switch;
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<template>
  <div
    class="el-switch"
    :class="{ 'is-disabled': switchDisabled, 'is-checked': checked }"
    role="switch"
    :aria-checked="checked"
    :aria-disabled="switchDisabled"
    @click.prevent="switchValue"
  >
    <input
      class="el-switch__input"
      type="checkbox"
      @change="handleChange"
      ref="input"
      :id="id"
      :name="name"
      :true-value="activeValue"
      :false-value="inactiveValue"
      :disabled="switchDisabled"
      @keydown.enter="switchValue"
    >
    <span
      :class="['el-switch__label', 'el-switch__label--left', !checked ? 'is-active' : '']"
      v-if="inactiveIconClass || inactiveText">
      <i :class="[inactiveIconClass]" v-if="inactiveIconClass"></i>
      <span v-if="!inactiveIconClass && inactiveText" :aria-hidden="checked">{{ inactiveText }}</span>
    </span>
    <span class="el-switch__core" ref="core" :style="{ 'width': coreWidth + 'px' }">
    </span>
    <span
      :class="['el-switch__label', 'el-switch__label--right', checked ? 'is-active' : '']"
      v-if="activeIconClass || activeText">
      <i :class="[activeIconClass]" v-if="activeIconClass"></i>
      <span v-if="!activeIconClass && activeText" :aria-hidden="!checked">{{ activeText }}</span>
    </span>
  </div>
</template>
<script>
  import emitter from 'element-ui/src/mixins/emitter';
  import Focus from 'element-ui/src/mixins/focus';
  import Migrating from 'element-ui/src/mixins/migrating';
  export default {
    name: 'ElSwitch',
    mixins: [Focus('input'), Migrating, emitter],
    inject: {
      elForm: {
        default: ''
      }
    },
    props: {
      value: {
        type: [Boolean, String, Number],
        default: false
      },
      disabled: {
        type: Boolean,
        default: false
      },
      width: {
        type: Number,
        default: 40
      },
      activeIconClass: {
        type: String,
        default: ''
      },
      inactiveIconClass: {
        type: String,
        default: ''
      },
      activeText: String,
      inactiveText: String,
      activeColor: {
        type: String,
        default: ''
      },
      inactiveColor: {
        type: String,
        default: ''
      },
      activeValue: {
        type: [Boolean, String, Number],
        default: true
      },
      inactiveValue: {
        type: [Boolean, String, Number],
        default: false
      },
      name: {
        type: String,
        default: ''
      },
      validateEvent: {
        type: Boolean,
        default: true
      },
      id: String
    },
    data() {
      return {
        coreWidth: this.width
      };
    },
    created() {
      if (!~[this.activeValue, this.inactiveValue].indexOf(this.value)) {
        this.$emit('input', this.inactiveValue);
      }
    },
    computed: {
      checked() {
        return this.value === this.activeValue;
      },
      switchDisabled() {
        return this.disabled || (this.elForm || {}).disabled;
      }
    },
    watch: {
      checked() {
        this.$refs.input.checked = this.checked;
        if (this.activeColor || this.inactiveColor) {
          this.setBackgroundColor();
        }
        if (this.validateEvent) {
          this.dispatch('ElFormItem', 'el.form.change', [this.value]);
        }
      }
    },
    methods: {
      handleChange(event) {
        const val = this.checked ? this.inactiveValue : this.activeValue;
        this.$emit('input', val);
        this.$emit('change', val);
        this.$nextTick(() {
          // set input's checked property
          // in case parent refuses to change component's value
          this.$refs.input.checked = this.checked;
        });
      },
      setBackgroundColor() {
        let newColor = this.checked ? this.activeColor : this.inactiveColor;
        this.$refs.core.style.borderColor = newColor;
        this.$refs.core.style.backgroundColor = newColor;
      },
      switchValue() {
        !this.switchDisabled && this.handleChange();
      },
      getMigratingConfig() {
        return {
          props: {
            'on-color': 'on-color is renamed to active-color.',
            'off-color': 'off-color is renamed to inactive-color.',
            'on-text': 'on-text is renamed to active-text.',
            'off-text': 'off-text is renamed to inactive-text.',
            'on-value': 'on-value is renamed to active-value.',
            'off-value': 'off-value is renamed to inactive-value.',
            'on-icon-class': 'on-icon-class is renamed to active-icon-class.',
            'off-icon-class': 'off-icon-class is renamed to inactive-icon-class.'
          }
        };
      }
    },
    mounted() {
      /* istanbul ignore if */
      this.coreWidth = this.width || 40;
      if (this.activeColor || this.inactiveColor) {
        this.setBackgroundColor();
      }
      this.$refs.input.checked = this.checked;
    }
  };
</script>
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<template>
    <div
    class="menu"
    // 事件绑定
    >
      // menuItem
      <slot></slot>
    </div>
</template>

<script>
export default {
    mixins: [...],
    name: 'Menu',
    componentName: 'Menu',
    inject: {
      menu: {
        default: ''
      },
    },
    provide() {
      return {
        'menu': this
      };
  }
}
</script>
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