el-input，textarea回车键不换行，发送消息

直接看代码，文本框代码，下面是绑定的事件
@keydown.enter="carriageReturn($event)"

1，textarea文本框

         <textarea
            style="
              width: 100%;
              height: 110px;
              outline: none;
              border: none;
              resize: none;
              padding: 10px;
              box-sizing: border-box;
            "
            v-model="textarea"
            @keydown.enter="carriageReturn($event)"
          ></textarea>

JS代码

 carriageReturn(event) {
      if (event.keyCode == 13) {
        if (!event.metaKey) {
          event.preventDefault();
          this.changeSendOut();
        } else {
          this.textarea = this.textarea + "\n";
        }
      }
    },
changeSendOut()//发送短信函数

2.el-input，type="textarea"属性

       <el-input
            type="textarea"
            id="demoText"
            :rows="6"
            resize="none"
            v-model="textarea"
            @blur="handleInputBlur"
            @keydown.enter.native="carriageReturn($event)"
          ></el-input>

 // 回车发送消息
    carriageReturn(event) {
      let e = window.event || arguments[0];
      // console.log(e,e.keyCode)
      if (e.key == "Enter" || e.code == "Enter" || e.keyCode == 13) {
        e.returnValue = false;
        this.changeSendOut();
        return false;
      }
    },