I am getting following error in my Node-Express App UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 4) To say the least, I ha…
Tag: javascript
d3 run animations inside function in order
I am trying to run animations in order. Here is an example. So i want to create a function like this so i can run them in the order rect1(), rect2(), highlightRect() one after another (after each animation ends). I have tried something like this but it gets messy when there are more animations. Might be an ig…
JavaScript to clear a select list when it is dropped down
Is there a way to trigger an event when an HTML select list is dropped down? I’m not asking about when it closed, but when you first drop it down. I’d like to set the selectedIndex = -1 when the user clicks on the down arrow of the drop-down. Most websites begin their drop-down with a blank entry,…
How to import from React-Select CDN with React and Babel?
I’ve created a react application following the steps on the React Website, but I’m having issues utilizing the React-Select Library (particularly the Select Component). I can only use cdn files to load dependencies, including the React-Select cdn file located on cdnjs I’m getting the followi…
How to add a class to a span element which is part of an existing tag with jQuery
How can I add a class to a span element for only these spans which are part of li tags with class=’error’ per example, this is the HTML which is generated: This is the code I have so far: Answer This is easy using JQuery, just select all li items that have the class .error and then use find() to
How to automate sheet to activate/move to cell with today’s date
I’m trying to implement this script to find the current date on all viewable sheets (Not Hidden) and move to the active date range (today) on whichever tab it’s on upon open. I found this thread but it’s now locked, https://productforums.google.com/forum/#!topic/docs/NiPjCPUOx3M The script t…
How does JavaScript mechanism behind react hooks work?
My question relates to Javascript mechanisms that make react hooks possible. Recent development in React allows us to create hooks, ie. for React state, within as simple function like: The hook useState returns an array with an accessor and a mutator, and we use them by array decomposition inside our App func…
Javascript – Where are ‘import’ and ‘export’ statements legal?
I’m studying the new import, export feature in Javascript but was wondering, where in code will these statements be syntactically legal? I understand something like the following won’t be legal: (function(){ import thing from ‘./thing.js’; })(); but does this mean import is only legal …
Component inside Component – VueJS
I am having a hard time to understand this, so I have a component which is already complied which is a grid, now when I click on a button a modal pops-up and display another grid inside the modal at this point my code looks like this for the modal pop-up Now, the grid is a vue component which was
Remove last char string when string contains emojis
I’m using React Native (chat), in this app I have one emoji picker but when users press virtual backspace button emojis only remove their last unicode byte. How can I detect if last ‘chat’ (set of unicodes) is standalone emoji unicode? Code to split it: I also tried to use Array.from(), then…