vue element判断只能输入正负数和小数否则不允许输入或提示

原代码

<el-col :span="12">
                            <el-form-item prop="tkcag" label="纵坐标" :rules="[{ type: 'number', message: '纵坐标必须为数字值'}]">
                                <el-input size="small" v-model.number="formInfo.tkcag" :disabled="layout.disabled" placeholder="请输入"></el-input>
                            </el-form-item>
                        </el-col>

/^(\-|\+)?\d+(\.\d+)?$/