iview render the batch number is defined for the letters or numbers (canonical)

iview render the batch number is defined for the letters or numbers

{
    value: '',
    field: 'num',
    disabled: false,
    validators: {
        required: {
            required: true,
            Message: ' NUM number can not be empty '
        },
        validateFun: {
            validator: validateFun,
            trigger: 'change'
        }
    },
    layout: {
        span: 8,
        offset: 0,
        row: 3
    },
    options: {
        rows: 1,
        type: 'text'
    },
    type: 'text',
    title: ' NUM No. '
},

Validation rules:
const validateFun = (rule, value, callback) = > {
    let reg = /^[a-z0-9]+$/i;
    if (value) {
        if (reg.test(value)) {
            callback();
        } else {
            the callback ( new new Error ( ' NUM number defined as letters or numbers ' ));
        }
        // IF (/\#|\\|\&|[\u4e00-\u9fa5]/.test(value)) {
         //      the callback (new new Error ( 'can not enter Chinese characters or special'));
         // } 
    } the else {
        callback();
    }
    callback();
};

 

end.