I am trying to optimize my React app in order to remove unnecessary renders. Please refer to this Snack for an example: https://snack.expo.io/bUZpyw0kH In this example app, there are two state variables stored in context. One of these values is updated every second, the other never changes. What I am trying t…
Tag: javascript
Random image from html on button click
I am trying to make a script that will take the images from one div element and put it to div rndmImage randomly on button click, I should see images when document is loaded, but the new div where images should go after click must be empty until click heapends. And I need only JavaScript, no jQuery, alse i ca…
I need a to get a value in a map so that its key that includes a value
I want to do something like: I’ve tried a bunch of stuff, like using Array.has() and Array.includes(), but I just can’t. I’m new here and in coding, so sorry if i messed something up or if the solution is absurdly easy. Answer Map Api doesn’t support anything of this sort out of the bo…
Sorting the Date of Format DD.MM.YYYY in javascript
I have set of Data having date along with the list. I need to sort the fields. I am able to sort all other fields except Date. Find below the code. And also if I sort the column “Name”, the other two column’s icon also changing. I want the solution like if i sort the particular column, that …
Setting showPrintMargin to false not working in React Ace Editor
I’m trying to remove the vertical line in my react ace editor: I’ve tried setting the printMargin to false but it doesn’t seem to be working. Tried restarting the server too but nothing. I’m also using next.js if that helps. Here is what that code looks like: Answer You’re using …
Parsing values from Google news
From Google news I’m attempting to parse the results. For example, parse the title and text from the search “latest movie releases”, here is the URL: https://www.google.com/search?client=firefox-b-d&tbm=nws&sxsrf=ALeKk01qAUzdE7UzK9aWPL9MYALHEk6aiQ%3A1599313588168&ei=tJZTX6vwCdWr1…
Create new Array using two Arrays Specific data and values
I want to create a new Array using two arrays. There is a itemTypeId i want to get itemTypeName match with itemTypeId. Expected Array I added below tried solution but its contain unwanted key-value pairs also. Attached screenshot of output. Answer You can create a Map object and map it with time complexity O(…
Trigger download immediately after document ready
I am trying to download a file immediately after a page has been loaded by triggering an a link. But this isn’t working for some reason. Am I doing something wrong? Answer You can dynamically create and click a link when the page loads – simply add this to the page markup:
Why I am getting cross origin error in React?
I am quite new in React. I have build an event scheduler web app but it’s only working in my browser if I try it to different browsers or someone else system it gives me this error: A cross-origin error was thrown. React doesn’t have access to the actual error object in development. I am trying to…
Acrobat Javascript in Chrome: how to trigger a HTTP request? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question I’m working on an intelligent PDF file. It’s supposed to send some simple data t…