valida | lightweight sanitizer and validator library | Runtime Evironment library

I'm new to Reactjs and this is my first webapp created with it, so probably it is just a petty error this one I'm gonna ask you to help me with. Basically I'm trying to validate my form but it doesn't work. It doesn't matter if I fill the form or leave it blank, if I press the send button, it gets sent, complitely bypassing my validation system. This is my form component, I'm using emailjs to handle the email sending (it works perfectly). Also the state of the component gets updated without any problem, it's just the validation itself that gets bypassed. I hope you can help me:

I'm trying to add a validation function in my form, but when I test it I get "Uncaught TypeError: Cannot read property 'handleValidation' of undefined". Since I'm new to reactjs (this is my first webapp made with react) I don't seem to be able to find where the error is. The behavior of this form is: when a user clicks on submit, it first performs the validation, then if valid submit the form via email (to do this I'm using emailjs). Like I said, it fails on the validation step (while everything else works fine, even the email). I hope you can help me, here is my form component:

I am trying to execute a event to verify if 2 input values are equals, but the javascript function dont works

I want to compare the valus of 2 text input box in realtime, like webforms, when the user type into the text box, the web says if the values match or not

This is the HTML

I have table TROQ which does have a field named cod defined as Varchar(13) (Postgres 11.8)

When the first four characters of cod are numeric it means it is "special troq". Special Troqs, according to this numeric first four characters can be "Production" when this four numeric characters form a code that is less than 5000 and "Development" when the code is over 5000. This is just for the example, in the real problem there are many more cathegories to special troqs, but each of them forming a numeric range as for the example

So I tried the following query:

I am using DRF to get and create data from and to the API. I was struggling with a model Question and a attribute category which is a model too. So in order to create and read data I had to implement this question's answer method. Therefore, whenever I create a question, its category is an integer but when I read it, is an object.

Whenever I use the default API route I can create and read the data, but I am getting the following error whenever I write a different route:

AttributeError: Got AttributeError when attempting to get a value for field category on serializer QuestionSerializer. The serializer field might be named incorrectly and not match any attribute or key on the QuerySet instance. Original exception text was: 'QuerySet' object has no attribute 'category'.

This is my custom code, where something is wrong...:

I've been migrating an old project from last year since Entity Framework 5 was released. Since I'm also migrating the frontend from the previous version of Vuetify I worked with last year (from 2.2.11 to 2.4.0), I've encountered some issues that I've had to look up online and fix, but I got this sudden issue that I can't quite lay a finger on and haven't been able to find a similar issue with an answer.

I'm trying to validate a v-text-field inside a v-card to not save a record if the v-text-field length is less than 3 or greater than 50 characters. Despite that I've followed up the same code I used last year to validate my v-text-field, I get the following errors on chrome console:

The last 2 errors from this image pop up when you click save when it should show the validation message:

The code used in the component is the following.

For the Validation message that should pop below the description v-text-field in red:

VUE:

I have a controlled form in React, binding the value. When I try to use the state value, I return undefined. I want to get the value informed in the input of the form, to use it in test in the component's functions. Follows code.

App.js

I want to scan the variable value $answer, and depending if it's bigger than 6, to be displayed as green, otherwise, as red.

Noob to Progress here and self-taught while working so sorry if I missed some obvious things. I learned about buffers yesterday and I'd like to know if it's possible to delimit the scope of what the buffer will search. Below, an example of what I want to know.