Question

119

If/else condition inside an Object

rated 0 times [ 120] [ 1] / answers: 1 / hits: 18008 / 13 Years ago, mon, june 13, 2011, 12:00:00

function Validator(formIsValid) {

    if(this.formIsValid) {

        alert('Form is valid!');

    }

    else {

        alert('Form is invalid...');

    } 

}

Validator.prototype = { // Notice the .prototype here, it's important!



  formIsValid: true, 



  enforceTextFieldMinLength: function(field, minLength) {

      if (!field.value || field.value.length < minLength) {

            this.formIsValid = false;

      }   

  },



  enforceLabelHasText: function(label) {

        if (!label.text) {

            this.formIsValid = false;

        }

  }

}

//var val = new Validator();

The above is my Val.js. This is how i am using in my otherFile.js

AddPatient.Firstname = FirstNameValue || Validator.enforceLabelHasText(FirstName);

I get an error saying cannot find function enforceLabelHasText in Object function Validator(formIsValid)

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davisbrandtm

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1 Year ago

answered 13 Years ago leiaf · Accepted Answer

You can't put expressions in an object definition. If you want code to be executed after an object instance is created, you should use:

function Validator() {

    if(this.formIsValid) {

        alert('Form is valid!');

    }

    else {

        alert('Form is invalid...');

    } 

}

Validator.prototype = { // Notice the .prototype here, it's important!



  formIsValid: true, 



  enforceTextFieldMinLength: function(field, minLength) {

      if (!field.value || field.value.length < minLength) {

            this.formIsValid = false;

      }   

  },



  enforceLabelHasText: function(label) {

        if (!label.text) {

            this.formIsValid = false;

        }

  }

}

var a = new Validator();

This is a dummy solution; you will want to add arguments to the Validator() function, to initialize formIsValid and the other values. I suggest you should read the MDC's description on prototypes.

EDIT: If you went with the prototype solution, you need to call val.enforceLabelHasText(FirstName), after making val a global variable (either by omitting the var or by using var window.val = new Validator()).