/**
 * 定义一个树形下拉选择组件
 * */

var selectTree={
    data: function() {
        return {
            selectValue:null,

        }
    },
    props: ['param'],

    template: `
    <el-select v-model="selectValue"  :placeholder="param.holder"> 
        <el-option style="height: auto"  >
            <el-tree
                    :data="param.treeData"
                    :default-checked-keys="param.defaultCates"
                    ref="tree"
                    :default-expand-all="true"
                    show-checkbox
                    node-key="param.nodeKey"
                    :props="param.defaultProps">
            </el-tree>

        </el-option>
    </el-select>
  `
}