I’m currently studying Javascript Algorithms. Below is the algorithm im currently trying to learn/understand. I understand the code, except for 1 line. So what this algo does, is it tries compares 2 arrays. If array b is equal to the square of each number is array a, then it should return true, else it …
Tag: javascript
JavaScript and HTML element manipulation
Project Concept: Creating an “exam maker”, which can be accessed by a teacher to create and let a student be able to access it to take. Many features would be included but to keep it simple on the question at hand i wont be including all info. Front End: List all questions in the database, using a…
the purpose of this code is to add an article at the end of the page, but the broblem is that appear then it desappear
the purpose of this code is to add an article at the end of the page, but the broblem is that appear then it desappear.please help me to figur it out 🙂 Answer This is because you are using a form without preventing the submit of it. There is no need for the form here, and by default it will
setInterval Overlapping DOM changes
I’m using setInterval to iterate through some images on a page and hide/show the next in a list after x seconds have passed. Every 30 seconds, I make a GET request to check for new images from my server. Because the http request takes about a second, setInterval begins executing the next iteration of my…
Extracting a portion of a webpage?
What I have in mind is the following: Load web page Find two divs with specific class names Extract the content of everything in between, except of the last div The reason I’m asking for it to extract anything in between is that the most important div I need doesn’t have a class name assigned. EDI…
Simple JavaScript & jQuery Functions ‘Sometimes’ Run Too Many Times
I’ve built a demo that simply allows you to create new rows and delete them. The rows are given a unique data-id attribute and an object where each data-id is pushed into a rows array. For some reason, clicking the remove row icon sometimes tries to delete it numerous times – for example, do the f…
How to test plain Vue components (not single file components)
All of these tries are throwing an error: @vue/test-utils/dist/vue-test-utils.js:2471 var componentInstance = node.child; TypeError: Cannot read property ‘child’ of undefined I have also tried to use localVue, to use shallowMount instead of mount and tried to pass Vue.options.components.test after…
How to avoid the ‘no-param-reassign’ rule with a input’s handleChange?
I’m working to build a React Textarea that auto grows/shrinks as the user types. I’ve built my component inspired by this codepen: https://codepen.io/Libor_G/pen/eyzwOx While I have this working nicely, I’m getting an es-lint error I’m unsure how to correctly resolve. eslint is not lik…
Combine javascript functions to work together
I am building a search form that filters the results based on the a text input as well as select options from four separate drop-downs (category, sub-category, location, etc). The following two functions work well, but I just realized that if I type a search term in the input, make my drop-down selections and…
How can I conditionally format my HTML table?
I have a HTML table like above I’m trying to do conditional formatting based on the formula applied on the numbers there I tried this: I could not get those values Any modifications or suggestions are appreciated Thank you Answer the only problem with your code is you are using wrong js context to searc…