React JS get current date
I want to output the current date in my componnent. In the console my code works, but the React console says:"bundle.js:14744 Uncaught RangeError: Maximum call stack size exceeded"My component looks...
View ArticleHow to determine if any arrays in an object has an entry
This is unlike most questions, which concern arrays of objects, not objects of arrays. I have a data structure such as the following, and I need to determine if any of the arrays contained by the...
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How does Firebase rtdb query on a range of strings using orderByKey, startAt,...
I have a firebase query that looks like this: this.db.object(`...irrelevent`).query .orderByKey().startAt(startVal).endAt(`${endVal}\uf8ff`).once('value').then(res => { if (res.val()) { // value...
View ArticleWhat do people use Symbol functions in Javascript for?
I recently came across some code that was using syntax that I wasn't too familiar with. At first, it appeared to be a function that was part of an object, but I can't seem to access it. I've found...
View ArticleJavaScript timer play/pause in one button
My goal is merge play and stop buttons to one. Buttons start/stop/reset timer.$(".start").click(function(){ $(".silent_lesson").TimeCircles().start(); $("#ding-audio").trigger("play"); });...
View ArticleRemove LF inside specific field and nowhere else
I have been asked to clean data up in a MongoDB collection we have to stored addresses and generic customer contact data. Data contains occasionally carriage returns that tend to break the load process...
View ArticleHow to refer textfield name in ajax?
I am trying to autofill information from a database into text fields when the user selects the specific name. I initialized the text fields with unique names that are dynamically added.This is the...
View ArticleHow to modify the value of an object when it is cloned?
Given the following objectconst data = { "123-456": { "03": 2, "04": 0, "05": 0, "06": 0, "07": 0, "08": 1, "09": 1 }, "123-789": { "03": 2, "04": 0, "05": 0, "06": 0, "07": 0, "08": 1, "09": 1 } };...
View ArticleCannot post back calculation to server
The problem showing up when I click the button submit.The error coming out 404 not found and "Cannot POST/Index" in the website. Am I have logical problems on the code or problem that occur on the...
View Articlejavascript Date.toISOString() return difference date value
I'm confusing about the javascript Date.toISOString() function which shown as below example, how come date value of x in ISO format become January?const date = new Date(); const x = (new...
View ArticleCan message passing be used to detect if another extension is enabled?
I would like to check if another extension is enabled. I understand Management API can be used to check if another extension is enabled (Detect if another Chrome Extension is installed). However, I try...
View ArticleReactJS: How to make redux store inaccessible outside the react
How can I make the redux store inaccessible outside of react? Is there any way I can store a value in a private variable throughout the session?
View ArticleJestjs - uncaughtException: describe is not defined\nReferenceError: describe...
I got this error uncaughtException: describe is not defined\nReferenceError: describe is not defined while doing unit testing with Jestjs in my Nodejs app. However, all tests still run well with npm...
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There is any standalone version of the treeview component of VSCode?
I'm looking to use the Treeview component of Vscode in a React App. Even a vanilla JS can help. I have looked in the source code of vs code, and in the NPM registry and didn't found. Even something...
View ArticleTrying to run a .js file but I'm receiving an error:
This is the error:'node"' is not recognized as an internal or external command, operable program or batch file. [Finished in 0.139s]Also, this is coming from atom text editor, if that's necessary...
View ArticleES6 exporting/importing in index file
I am currently using ES6 in an React app via webpack/babel. I am using index files to gather all components of a module and export them. Unfortunately, that looks like this:import Comp1_ from...
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Scrolling html table with header background
I have a table where the user can scroll though the rows when they are overflowing the div. However currently the table header row does not have a constant background for the full width of the table....
View ArticleAllow CORS on Android React Native
I'm using superagent to upload files from my React Native app. It works perfectly fine on iOS, but on Android it gives a cross-domain error.I've created a minimal example here...
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for of, False positive eslint(no-unused-vars)
My code: for (const i of [1, 2, 3]) { console.log(i) } eslint message: 'i' is defined but never used.eslint(no-unused-vars)
View ArticleHow can I allow users to overwrite the numbers in the input control (when...
Please see the JavaScript below:maxLengthDay(event) { const maxLength = 2; if (event.target.value.length + 1 > maxLength) return false; else return true; } and the HTML below:<input...
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