vue实时限制字数输入：

<div class="rejectedPoPMain">

         <div class="rejectedPoPMainCenter">

             <div class="instructionsLeft">说明:</div>

             <div class="instructionsRight">

                 <el-input

                 type="textarea"

                 :rows="2"

                 placeholder="请说明复议原因"

                 v-model="reviewTextarea"

                 :maxlength="200"

                 >

                 </el-input>

                 <p class="instructionNum">您还可以输入{{200-reviewTextarea.length}}字</p>

             </div>

         </div>

         <div class="submitBtn">

             <button class="btnSubmit" @click="mendCollectDiaBtn()">提交</button>

         </div>

     </div>

复制下来直接用