CanvasList | A lib to draw list in canvas | Canvas library

I'm trying to create two radial gradients to use with a Charts.js doughnut chart.

The gradients should look kinda like the image below but in red.

Creating the gradients (createRadialGradient) was pretty simple using vanilla javascript and the DOM, as displayed in the code snippet below:

I am trying to create a reusable stateful component (it shouldn't be functional component). I need to add this component in runtime so in my App i have an array of the component (CanvasComponent) in my state to render the list of component. I also generate a random size to render the size of canvas. The problem occurs when I create second canvas, Weirdly it is only render once. I have this problem in ChartJS and since my code base is very big I decided to simplify it by a sample.

However if you uncomment CanvasComponent in the Array it works perfectly fine.

We are Fetching mask image from JSON & displaying inside Container

Onclick Mask image, we are allowing to upload another image on mask as below, also user can drag the uploaded image as in Codepen1, everything was fine...

Now Client want to display mask image above Box image, so I displayed mask image on top of box image as below :

Issue :

when I click on mask image [left side], higher z-index value assign to box image, so box image will override mask image. because mask image & box image are overlapped with each other.

when I click on mask image [right side], then there is no problem...

Also, I can able to drag the uploaded image successfully from the right side of mask image but not from the left side.

Z-index code :

I'm working on stress testing our application in Apache JMeter.

I thought of calling register user method which will add users in the database. But if the email already exists, then the database action does not take place.

How can I add a random number in body data? Or is there some other way I can stress test my application connected with database?

Here are some screenshots :

Controller code :

I am working on stress testing our webapplication written in Spring-MVC.

I would like to send an object Person to the application. I have added a system out to get the email, but whenever I am sending the object, it is null. What am I doing wrong?

Server code :

Once click on Text, we are displaying Pop up box....

Requirement :

When user click on outside popup, i am trying to hide the pop up here : https://codepen.io/kidsdial/pen/VNxMYO ....

Issue :

For that I tried below code , but after that when i tried to change font-family through dropdown, then popup will close....

Background :

1.User click on Mask & upload their own image on the mask....

2.Once image uploaded, Edit Text is displaying on image....

3.Once user click on Edit Text, we are displaying pop up box....

4.Inside Popup box, we are displaying text Content & button Close

Once we click on "close" , its closing the pop up box....

User click on Mask image & upload image from his computer....

For First mask image, there is no space b/w Edit and Remove Text , thats fine....

Issue :

But for 2nd mask image, there is space b/w Edit and Remove Text , but i don't want that space....

Codepen : https://codepen.io/kidsdial/pen/WWpEZv

Fiddle : https://jsfiddle.net/kidsdial1/9rdwjoce/

Edit code :

Once user click on Mask images, we are displaying file upload dialog box....

https://codepen.io/kidsdial/pen/XQmRvP

We are using below code for click :