I have some questions about async and promise. (sorry guys I'm newbie at programming) Can javascript only run functions asynchronously with functions/webAPIs like XMLHttpRequest, DOM, setTimeout, etc? can we make our own function that runs asynchronously? If we make a…
I'm quite bad with JS promises and async and I face a problem about it. First things first the simplified code: self.addEventListener('push', (event) => { const data = event.data ? event.data.json() : {} if (isClientFocused()) { console.log('Don't need to show…
There is a problem with following code. async function loadVideo (src, crossOrigin) { let video = makeVideo (src, crossOrigin); return new Promise((resolve, reject) => { Promise.allSettled ([ new Promise ( (resolve, reject) => {video.addEventListener('playing', () => {resolve(1);}, true )} ),…
Disclaimer: I am trying to learn, so question may be (an probably is) trivial; any comment on better ways to do the same are welcome, but I need to understand underlying concepts. I am more of a python programmer, so…
as shown in the below posted code, i am returning a promise form a function.i would like to display a text message with argument when the promise is resolved. in other words, for the following line of code: resolve("successfully saved…
I have a JSON object I want to stringify. Some of the values in this object are Promises. How can I use the replacer parameter in JSON.stringify() to pass the result of the Promise, instead of the promise itself? To…
I'm trying to call 200 remote resources to show in my table, with a progress bar showing the amount of calls remaining. Using this example on how to use Fetch() with Promise.all() to call setState() with the new data. My…
After upgrading react-scripts from v4 to v5, I'm facing a problem with react-query ^3.34.8. I am rejecting a promise within useMutation which is causing the runtime error Uncaught (in promise): // Component.js import useDeleteMutation from './useDeleteMutation'; export default function Component(){…
I have a couple of JavaScript functions that call ajax promises to populate fields. Like this: var functionA = function () { //Prepare data for ajax service call service.getDataA() .then((data) => $("#inputA").val(data)); } var functionB = function () { //Prepare…
My "save" function asynchronously invokes my "uploadPart" function. "uploadPart" should save the part it is given, then return the generated part id. Within "uploadPart", I'm able to write the part id to the console - it is correct. However, the…