Vue.js Form Validation: Enforcing Numeric Input for newId

You can enforce numeric data type for the 'newId' field using custom validation rules in Vue.js. Here's an example:

const rules = reactive<FormRules>({
  newsID: [
    { required: true, message: '请输入关联ID', trigger: 'blur' },
    { max: 30, message: '限制30位字符', trigger: 'blur' },
    {
      validator: (rule, value, callback) => {
        if (typeof value !== 'number') {
          callback(new Error('关联ID必须是数字'));
        }
        else {
          callback();
        }
      },
      trigger: 'blur',
    },
  ],
});

This validation rule checks the data type of the 'newId' field. If it's not a number, it displays the error message '关联ID必须是数字'. This ensures that only valid numeric values are accepted for the 'newId' field.