Button Add Function

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1

Hello,
I have a language center where students top up there cards to visit classes, now I have a button and an input filed of number in the dynamic page. the button has the label “Top Up For 12 Lessons”. When I press this button I want to add the sum 12 to the number the filed has. For example. The student has 6classes remaining but he wants to top up the card, I press the button “Top Up For 12 Lessons” and it adds 12 to the number 6. So I get 12+6=18
I don’t need the button to save the dataset, I just need to add the sum.
How can I have this work with an onClick event?
Please can someone give me the code for this?
Thanks in advance!

2

Hi,

First, you should get the value of that field for that student, check THIS for more information.
Second, add that value you get to 12 . For example :

let sum = results.numOfClasses + 12 ;

and then you can save the sum or use it where you want.

hope this helps!
Best,
Mustafa

3

Dear Mustafa, Thank you for your help. I have tried your code, but I can not make it work. Please, if it is possible, can you give me the code for this?

880×451 74.2 KB

4

Hi,
Can you please share the code you have tried? so we could fix it.

5

Hello Dear Mustafa,
Here is My code. Please check it. Thanks in advance.

export function c12_click(event) {
 let numOfRemaining = ("#Remaining").value
    .then( () => {
    get.("#Remaining").value
 let sum = results.numOfRemaining + 12
}
6

This code will not work. Few things you should know :
1- At first you should get the user id, so you know which user you will get the value of Remaining from.
2- That’s no the right way to use .get , please read this Api carefully - Here

so basically, what you should do is :
1- get user id - Help!
2- get the data from the field you want - named as remaining .
3- add 12 to the value you get from step #2.

7

OMG, I am trying it so hard, but I can not make it work. Please help me with this. I will be very glad.