The code looks as following: The this.document.Sections is object that contains properties (objects as well). How to get rid of this error? Answer As the message says, this error comes from passing null to Object.keys. Try it in the console: So, in your code this.document.Sections is null. Here you have an op…
Tag: javascript
How to change the color of vaadin-select-text-field in the vaadin-select within page only?
How to change the color of vaadin-select-text-field from the vaadin-select within page only? For the vaadin-select source, it is not changed. I want to custom on the vaadin-select in the page. Anyone who can style the vaadin-select? I’ve tried to change the style of vaadin-select but it is none. This is…
Proper TypeScript type for creating JSX element from string
I have a component that I want to default to being rendered as an h2. I’d like the consumer to be able to specify a different element if they desire. The code below results in the error: TS2604 – JSX element type ‘ElementType’ does not have any construct or call signatures I think I un…
memoizee – Cached based on arguments
I would like to memoize results of function based on provided arguments. For example: This invocations should be independent and should have standalone cached results. Currently I always receive the result from the first call. I tried used other library than memoizee. With fast-memoize I got expected effect, …
Invalid hook call. Hooks can only be called inside of the body of a function component
I want to show some records in a table using React but I got this error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons: You might have mismatching versions of React and the renderer (such as React DOM) You might be br…
Allow only numbers with only specific alphabets in textbox
i have a text box in html, i want to allow user to only input following range 0-9 and NA there are two cases 1: user inputs range form 0-9 numbers and 2: user inputs only NA (NA denotes Not applicable) how could i allow user to do this I try following code but it does not work Answer Add
Cannot read property ‘writeHead’ of undefined
I have successfully hosted an local .NET server with the url: http://localhost:65349/. Now I want to change the “localhost” to my IP Address such that the Web is still running,however, the 400 HTTP error received I have download the iisexpress-proxy into my computer by Nodejs, however, why trying …
Discord bot get number of users in all channels
Im not good with javascript but i have been trying to get count number of users in all voice channels. For example: if 2 users in ‘voice channel 1’ and 1 user in ‘voice channel 2’ I want to print number 3 in console which is all users in voice channels. This code print all members(onli…
Ajax ResponseText is getting true but can’t write to div
Ajax Code: Functions.PHP : Responsetext show on console but can’t write to my div ( id: #xcvb ) Any one can help me about this ? https://up.uac.ist/images/2019/06/17/Screenshot_2.png https://up.uac.ist/images/2019/06/17/Screenshot_3.png Answer Looks like you have a few things wrong here. This is the pro…
weekdays with date-Digit number in moment js
I am trying to find WeekdayName with dateDigit in moment js. for example: Wednesday 13 I have found these => moment(date).format(‘dddd’) But is returning me only Wednesday not digit number. So any lead, for answer appreciates. Answer format – dddd DD dddd – Day Name DD – Date