calculating field with JS

[Craig Rowland]

Been reading up on JS. Whilst I get the basics for example the below code to sum two variables

http://jsfiddle.net/g7zz6/

I don't understand the relationship with the appery "bits".

For example. I have two fields. but I want to multiply them together and get a third field based on a rule.

I get the logic of the code snippet quoted above but

1)how do I get the variable names (is it just the class name)
2)where do I specify the JS.
3)Do i make server code?
4)Do I make a local storage variable and put code there.

Im confused, im just not quite sure where to start. I read the similar questions and responses but they are a step ahead of where I am so don't help me at this stage. No doubt I will refer back to them though

[Yurii Orishchuk]

Hi Craig,

Here is main things you have to know:

1 user can see values in components(for example label)

2 each component in Appery.ioi has name. See details where you can find it this name: http://prntscr.com/4je1kq/direct

3 To get value from two labels, make calculation and set result to the third label you can use following code:

pre

//Note: you need to replace "firstLabelName" with your component name.
var firstValue = parseInt(Apperyio("firstLabelName").text());

//Note: you need to replace "secondLabelName" with your component name.
var secondValue = parseInt(Apperyio("secondLabelName").text());

//Calculation.
var result = firstValue * secondValue;

//Set result to the result label.
//Note: you need to replace "resultLabel" with your component name.
Apperyio("resultLabel").text(result);

/pre

That's all. On this code base you can create your own logic you need.

Regards.

[Craig Rowland]

thanks for this. WIll give it a try

[Craig Rowland]

Last question. Where does the code go?

[Yurii Orishchuk]

You can use this code in any JS event handler.

For example on button click:

See details: http://prntscr.com/4jeenb/direct

It's best way to understand how to work with this tool to pass this tutorial: http://devcenter.appery.io/tutorials/...

Regards.

[Craig Rowland]

Thank you very much for your help

[Craig Rowland]

Rather than start a new thread. This didn't work

I did this

On Load create a local variable called AnnualPrem
Used the JS above to multiply the labels PremiumFreq * InputPremium to creat a result called AnnalPrem

Am I missing something?

I couldn't find any relevance in the linked tutorial sorry but i looked at this one http://devcenter.appery.io/documentat...

following those instructions didn't yield any result either

To test this I'm trying to get the field

AnnualPrem to populate on clicking the SAVE button. It would be ideal.

[Yurii Orishchuk]

Hi Craig,

Please give us your app public link and describe steps to reproduce your problem.

We will take a look.

Thanks & regards.

[Benoit]

Hello,

I have another problem regarding field calculation. I would like to make the sum of label fields. The total is only equal to one field. I wrote the following script where total_price is the label name of each cart lines. Total TTC should be 14.7 and not 8.5.

Script :

var sum =0;

Apperyio("total_price").each(function(){
var total_price = parseFloat($( this ).text());
sum += total_price;
Apperyio("gran_total_price").text(sum);
});

Thanks for your support.

Benoit

[Yurii Orishchuk]

Hi Sauvage,

Please try following script instead of yours:

pre

var sum =0;

var items = jQuery('[name="total_price"]');

items.each(function(){
var total_price = parseFloat($( this ).text());
sum += total_price;
});
Apperyio("gran_total_price").text(sum);

/pre

Regards.