Questions tagged [ecmascript-6]
ECMAScript 6 reached feature complete status in 2014. The features vary widely from completely new objects and patterns to syntax changes to new methods on existing objects.
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Chaining backend calls from VueJS method using Axios
This is the first ever bit of front-end code I have ever written, I have tried to adapt the existing call that is there to the backend using axios, so I check on of the response object value using the ...
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Randomly set styles with JavaScript
I have created a function which randomly sets styles using CSS selectors. Right now it returns a random item from an array. The program also works with shorthand properties (such as ...
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Differentiating all the numbers in an array with color codes
Here is a working code for differentiating all the numbers with color codes on an HTML page. How could this code be optimized by using built-In techniques or making use of ECMA Scripts? So that the ...
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Configuration of an ES6 module that provides a fetch() (temporary) cache
This code works and it's fine (although it's not yet literate, but that will happen soon)
What I am especially bothered by, is the way you configure it.
Right now, you use it like this:
...
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Download entire localStorage as file
I would like to download the entire contents from localStorage to a json file (in a "clear" formatting).
I've tried this and it works perfectly. However, ...
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Find a property of an object in array of objects with the min/max number in another property
So I have notes that have a lastEdit which is a timestamp in milliseconds and a unique id. I ...
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2
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Javascript convert number string to Boolean
I'm making this control toggle between hide and show base on the value in this hidden value. I wanted to use a Boolean because I ...
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A prime iterator in JavaScript
This is an implementation of a Sieve of Eratosthenes as [Symbol.iterator] in JavaScript.
Comments welcome, my JS is a bit rusty. Making a class of this is mainly the reason to have fun with the ...
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Embedded Timer Explorer
This is a toy design analysis utility meant to support decisions around
configuring a
timer
on a microcontroller. The initial configuration is an example meant to
partially represent the possible ...
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Don't Upload Existing Images in React
I have successfully filtered images that are existing in React.
My problem is I wanted to improve or use the latest JavaScript on this particular code below where it filters the images.
How do I ...
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Google Chrome Service Worker Persistent Storage Caching System
Moving from Google Chrome Extensions’ Manifest V2 to Manifest V3, service workers replace background pages. Background pages can be configured to be persistent, but service workers can’t be persistent....
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Show selected person in another panel
I was playing with JavaScript in order to practice and wanted to make a list of people, which when clicked showed the person's details in another part of the screen.
Here's the code I used to ...
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2
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group computed properties in vue component
I have the following vue component which all works fine
...
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avoid reassigning variables in javascript [closed]
I have the following piece of code.
...
2
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1
answer
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Filter Options in React
I have several products. A product can have 1 or more images. In each image, we have content slot. I don't want duplication per content slot in a product.
My code works fine. I'm just wondering what ...
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Extracting a part of a URL path
I have a string like the one below from which I am extracting the tariff name.
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70
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Processing list of users- filtering out from refused list
The code below takes a list of users and displays two lists
Refused users
Admitted users
Sample output:
Refuse: Phil, Lola.
Admit: Chris, Anne, Colin, Terri, Sam, Kay, Bruce.
Any feedback is ...
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2
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Tic Tac Toe in object oriented JavaScript
I've been working on a course assignment for 'The Odin Project' and was hoping to get a review of my code.
As per the help guide, the code is fully functional.
The criteria for this was pretty ...
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PHP blogging application with AJAX loading
I have been working on an online newspaper/blogging application with CodeIgniter 3.1.8 and Twitter Bootstrap 4.
The latest feature added is lazy loading of posts.
From the Static_model (...
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2
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166
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Check for max value in stack
Got this problem in a coding interview -
Get the max value of a stack in O(1).
The stack contains numbers only.
Please review my solution.
...
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1
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51
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1
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1
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Vue and JSONPlaceholder application
I have put together this small application that uses the JSONPlaceholder API and Vue.js.
The application crosses users and posts and displays the posts by user (author):
...
- 557
2
votes
1
answer
101
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Learning asynchronous caching by implementing one
After implementing a serial CLOCK second-chance cache in C++ without having enough rope to shoot myself in the foot, decided to dive into Javascript through NodeJs and write an asynchronous one. I ...
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2
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Javascript - On mouseup check if any of the parents has/includes specific id
On my page I have a mouseup eventlistener on document. I want to be able catch if the clicked elements has a specific ...
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1
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How could this indentation-based lexer be simplified?
I finally got this lexer working, full implementation here. How can the lex function be simplified? The goal is to take a tree of indentation-based text, and ...
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JS script fetching GitHub API for personal website
I've built a very simple personal website, everything is in a single file because it is very straightforward, but I think the JS script could be better structured. All it does is fetch some repos from ...
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list of games to open radar match in iframe on for drop-down controls
In general my page is slow and has several points in the code that I believe can be improved, even in relation to the structure used. Anyway, the biggest problem is:
The page I'm creating is very ...
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2
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179
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Single user Electron application allowing basic CRUD operation on a table (stored in JSON)
I am completely new to JavaScript and I will be grateful for your comments on my Electron app (electron is a JS framework allowing to create of desktop apps).
I needed to create an application that ...
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1
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575
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Recursively access deeply nested object
Problem Statement
I need to access a deeply nested object. I could've used a 3rd party util such as Lodash but insisted myself on writing a Vanilla JS solution with a recursive strategy.
Code
Can this ...
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2
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298
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1
vote
3
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119
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Run-length coder
I have this code, which counts only adjacent letters in a string and returns the count of each letter.
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2
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244
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File naming (two files cannot have equal names)
This is a challenge I completed at CodeSignal.
You are given an array of desired filenames in the order of their creation. Since two files cannot have equal names, the one which comes later will have ...
- 231
3
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2
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63
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Limit second <select> options based on the first <select>
I want to see if there's a better way to write this code, solely in Javascript.
There are two kinds of sets, the first set (C7, T7, C11, T11) have four options in the first select, and then up to two ...
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Restructuring JSON to create a new JSON where properties are grouped according to similar values
I have a JSON structure in the following example format:
...
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52
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Custom HTML Element with scrolling text
A junior developer here.
I wrote a simple javascript custom element code here: https://codepen.io/rndbox/pen/mdWxryw as clean as I could with some advice from Junior Vs Senior Code - How To Write ...
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1
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388
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JavaScript discrete slider web component
The standard HTML range input element suffers from a number of limitations that caused me to implement the web component presented here.
First, it is unnecessarily complicated to style the standard ...
- 245
2
votes
1
answer
279
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To-do app front-end in Vue 3
I have put together a To-do Application with the Slim framework on the back-end (API) and a Vue 3 front-end. I added a demo on my YouTube channel.
In the main App.vue file I have:
...
- 557
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votes
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concise way to build an object from an array of objects
The following code is working as expected but I'm wondering if there's a way to use Object.assign, or some other approach, to build the ...
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Node backend to run user-submitted code in a virtual machine
As per the title, I'm making a webapp that is intended to use as a JS exercise platform. Problems are shown to users, they submit code, that code is run against a few test cases, and a report of the ...
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1
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JavaScript copy-to-clipboard class
I am have made a small copy-to-clipboard script.
I have made a method called copyToClipboard that does the following:
create an input box;
read the content of an ...
- 557
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votes
1
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Javascript Pub/Sub
Here is a short pice of code that suppose to work as Pub/Sub or EventDisptacher of some sort.
I only do code in JS a few times a year, so hence I'm asking for your time. Right now I'm working on ...
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1
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Randomly rearrange table rows without unnecessary reflows
I recently completed a coding challenge for a company that did not get me to the next stage.
They were kind enough to provide the following feedback:
The coding assignment does not match what we are ...
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2
answers
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Combine data from array of objects
I got this data structure and I am checking to see which properties are true, then I am adding the key for all the properties that are true to that object on a new ...
- 177
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1
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A (deep) cloning method for ES-Objects
I have written a (recursive) deep clone method for ES/JS-objects. It seems to work fine, but maybe I'm missing things. Please, feel free to comment!
Note: the method will not clone cyclic structures. ...
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Get default value from query params + repeating code
The main goal of this task is to take values from the query parameter and put it in inputu. The first problem is that I don't know much about how to do it so that the code doesn't repeat itself and I ...
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2
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Recursively find data in array of objects
On this script I look up properties in an array of objects. There is an original array of strings list to get the objects that match the ...
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