My code: And got this: I found this very odd, as I had seen other similar problems that either used a callback or a Promise or some other asynchronous method, while I used just a synchronous for loop. ———————————- Some update ———————— Answer Use the non-null assertion operator to ensure that “its operand is non-null and non-undefined in contexts where
Tag: variables
Giving class to an object
I have a few variables with colors that I want to change later. I want certain class to have background color from that variable. Every object with that class should be that color (nav, footer etc.). I have something like this, but it doesn’t work. Can you help? Answer in fact I didn’t see any problem, but you can also
RegExp logical problem with variables in javascript
we have some checkboxes and When each of the checkes comes true, a value will be added to a single textbox. and when each of the checkes comes false, their own value will be deleted. I hope I explained well. any way… here is my code: I do know that it is not a clean code:) btw ab is my
Function return boolean statement
Task Instructions Your task in this activity is to create a function that checks if a person is old enough to vote by checking their age. This function is called isOldEnoughToVote(age) and has the following specifications: It takes an argument called age representing the age of the person. It checks if the age is greater than or equal to 18.
How to check if variable is not falsy but 0 passes in Javascript
Is there an elegant way to check if variable is NOT falsy but in case of 0 it passes. The issue with this way of verifying if(var !== undefined && var !== null) is that it’s long and doesn’t cover all cases like undecalred or NaN. I’m also using typescript and declare it as optional number. Answer You can do
How to add variable inside google URL in Javascript? I have tried but in Google it shows up meaning of “Undefined”
When I run it shows me the meaning of “Undefined” in Google. When I run it, it performs a Google search for the word “Undefined”. Answer If the #search field cannot be found document.getElementById() returns undefined, which is used as part of the search query. You can write a function like this, which will allow you to pass in a
Javascript “Not equal to” feature from a prompt
I am a very very beginner in Javascript and am trying to use only very basics. I am trying to only allow two certain words to be accepted into a variable prompt. If anything else other than the two allowed words are entered, I want to display a message saying only the two words are allowed, and to try again
Cannot create type as specific number when number is in variable
I want to create a type that can be only 1 or root 2. This works: But when I try to use Math.SQRT2, or any variable reference to the numeric value of root 2, I get an error. For example: Typescript playground demonstrating the issue In my code I want to be able to reference the root of 2 with
Problem with script that is suppose to add two numbers
I wrote up a code designed to add two numbers and it keeps returning a NaN when I ask for an answer, I am fairly new but would like to know why this code in particular does not work so I can make sure I don’t make the mistake again. HTML JavaScript So the first condition works and sends an
How do I call JSON data stored as a variable in a different component?
I am currently drawing JSON data from my api using axios, and I am mapping this data and storing it as a variable. I want to be able to call these variables in my react components, but I can’t seem to figure out the best way. Getting the JSON data and storing as a variable And I want to be