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I found that, if:

1. there are two setState
2. the first one is called with a value obtained from await
3. the both are called in the same thread

then, there is a frame where one state is set but the other is not.

Example:

I'm following the tutorial of the library go.js: https://www.youtube.com/watch?v=EyseUD_i6Dw&list=PLOiCuGu6tcUSvKsqFnemvGTfdT97wVLsX&index=3.

I reached this point without problems, but at this point I'm getting this error:

The code below will show/hide all the columns in a BootstrapVue table. Credit of the code goes to the answer here;

Show/Hide columns dynamically with a bootstrap-vue component and bootstrap 3

I can't get cellEdited to trigger in version 5.0 or greater - it did in 4.9 and does not work in v5.+

I read through the upgrade docs, but didn't see anything that might have changed for this feature.

Here is a small example of what worked before but no longer works.

Thanks in advance.

I am an ASL.NET Core developer and I try to use vuejs in order to create some complex forms. In order to learn how to use it I create static html files in order to understand how the components work in vuejs. I have the following example:

PS: Is it not a research kind of question! I have been trying to do this from very long time.

I am trying to make web based an image editor where user can select multiple cropping area and after selection save/download all the image area. like below.

As of now I discovered two libraries

1.Cropper.JS where is only single selection feature is available.

2.Jcrop where only single selection area restrictions.

I am currently using cropper.Js but it seems impossible for me to make multiple selection cropping. Any help is much appreciated.if any other method/library available in JavaScript, Angular or PHP or reactJS for multiple image area selection and crop and download in one go as in the image below.

As per @Keyhan Answer I am Updating my Jcrop library Code

I am trying to figure out when the re-render occurs when updating state in React with useState hook. In the code below, clicking the button triggers the handleClick function which contains a setTimeout. The callback inside setTimeout is executed after 1 second, which updates the state variable count by calling setCount. A console log then prints a message.

The order I would expect the console logs to show up once the button is clicked are:

1. 'Count before update', 0
2. 'Count post update in setTimeout', 0
3. 'Count in render', 1

However the order I see after running this code is:

1. 'Count before update', 0
2. 'Count in render', 1
3. 'Count post update in setTimeout', 0

How is it that "'Count in render', 1" shows up before "'Count post update in setTimeout', 0"? Doesn't setCount result in the scheduling of a re-render that is not immediate? Shouldn't the console log immediately after the setCount function call always execute before the re-render is triggered?

I am building a vue component containing form in an html file. Need to validate form using vuelidate library.

Below warning is showing and validation is not working.

[Vue warn]: Property "$v" was accessed during render but is not defined on instance. at

I have dropdown list. I want to put "title 1234" in first place of dropdown list. It is important that when "title 1234" is selected, its value is 1234. How should I do it?

To get it like this:

Now list looks like this: