控制label标签的宽度,不让它换行 label标签左对齐

<el-form-item
        label="访问密码:"
        label-width="100px"
        prop="accesspassword"
        style="width:280px;  "
      >
        <el-input v-model="VideoFirst.accesspassword"></el-input>
    </el-form-item>

<el-form
      :model="VideoFirst"
      :rules="rulesfrist"
      ref="VideoFirst"
      :label-position="labellocaltion"
      class="demo-ruleForm"
    >
    </el-form>