:rows="2"==》固定行数

:autosize="{minRows:2,maxRows:8}==》高度范围

autosize ==》文本域高度自适应

<el-form ref="createForm" :model="createForm" :rules="newRules" label-width="100px" label-position="left" size="mini">
    <el-form-item label="描述" prop="desc">
        <!-- <el-input type="textarea" v-model="createForm.desc" :autosize="{minRows:2,maxRows:8}"></el-input> -->
        <!-- <el-input type="textarea" v-model="createForm.desc" :rows="2"></el-input> -->
        <el-input type="textarea" v-model="createForm.desc" autosize></el-input>
    </el-form-item>
</el-form>