Emailer | General task plainer thingy with scheduled emails sender

problem image is here--> https://postimg.cc/4mYB30C6

There are two problems

One: warning me the controlled component to uncontrol though I use handler event;

Second: js include function 1st time define 2nd-time type error.

I cannot find my problem I use two-time value and define it with let but they told im not to define 2nd why include showing me type error

I am using nodemailer to send mail
It works perfectly on the local instance as it is the same device
NOTE: This is just a representation of the mailer program and there are different values in the actual codebase
My code
nodule.js

I'm new to flutter and i'm trying to make firebase sign in using email and password!

everything works fine within the console but at the app it doesn't take me to the home page with correct credentials!

main.dart:

How can I make sure that handleOpen only executes after all the states (nameError, emailError, messageError) have been updated? My problem is that since state doesn't update immediately, sometimes handleOpen executes when it shouldn't.

I have a contact me form in my website and I'm trying to send an email using gmail service and it's working flawlessly in my local dev environment, but I'm having this issue:

{code: 'EAUTH', response: '535-5.7.8 Username and Password not accepted. Lear…mail/?p=BadCredentials e19sm4851511qty.16 - gsmtp', responseCode: 535, command: 'AUTH PLAIN'}

I googled a lot and looked in the docs but all I found was to make the "Less secure app access" option in Google accounts turned on, and I did that, I tried turning it off and on and I made sure it was working in my local machine, but unfortunately it's not working in when I send the request to my API in Vercel endpoint.

my React code

In my project, I am using antd Form in the login screen. If the user hasn't provided email or if the email is invalid, I am handling that using the rules attribute that antd's Form.Item supports.

Here is what I wanted to achieve:

I also wanted to handle another error which is 'No account associated with email'. After the user click on the login button, there is a back-end API call. When the backend returns this error in the response, then UI should show this error message under the email input.

To achieve this, I am storing this error message in a state variable 'emailError' and I'm using this in the 'rules' attribute of the Form.Item as follows:

I have a register controller that uses try {} catch(e) {} mechanism to me its a pretty decent ad-hoc mechanism for error but overall is it better switching to promises as i think promises offer more granuler error handling mechanisms, so below is my code as of now in my controller.

I need to send a email with nodemailer, but in the email i need to attach an pdf that i generate using jspdf, the thing is that i cannot attach an object to an email, i can attach a file getting it's path, a string, and a lot of other things, but an object i cannot.

I tought of saving the pdf and using it's path, but this is all working on an VM, so i dont want to use too much cpu power or ram space.

I also tried using JSON.stringify() in the pdf, but it didn't work, and the file attached to the email was empty.

I was building a simple PHP login form that contains both required fields and validation. regardless required fields, I want to display an error message for each input element that had not been filled. But I come across a problem on the way. The span element I use for styling does not disappear when there is no content in the span element. I wrote some javascript code and it did not work. I want the span element to hide when there is no content because the $nameerr equals to "" at the start. When the $nameerr equals to "Name Required" string, the span element should be visible only at the time. How to achieve that?

Note: I only want to test for $name and $nameerr first before implementing other variables, So other variable is "".

Here is my code for php: