JavaScript function on tag is getting executed without calling and even I applied onClick event listener

I am trying to call a javaScript function on click tag. But the function is getting executed automatically when I didn’t click on the link and I have also applied the onClick event listener for the …

A function creating variable names for parameters that I never gave

I am learning JavaScript from an eloquent book and in the chapter about higher order functions I found this code: function noisy(f) { return function(…args) => { console.log(“calling …

get the number of inputs given to a function js

Assume i have created a function function findInputGiven(){} and i called it somewhere below twice findInputGiven([1, 2], [3, 4]), findInputGiven([1, 2], [3, 4], [5, 6]). This function can be called …

In javascript, what’s the difference between an instance function and instance variable of type Function?

I know one of the difference is that instance variables of type Function automatically bind to the class. For example: class Dog { sound = ‘woof’ bark() { console.log(this) } boundBark …

Catch block wrapping a function that throws inside a setTimeout not executed

Experienced something strange recently, none of the catch blocks get executed: function funcWillThrow() { try { setTimeout(() => { throw “Has thrown”; }, 3000); } catch (…

Check for changes in MySQL, node.js

How can I, in this code, take the data that has been changed in MYSQL and return it in another function? For example, take the id_ticket column and use it in another function. const instance = new …

HTML onclick event doesn’t work with parameter

When I click my button, which should make things visible and invisible, the whole website disappears. What I was trying to do is to make a div with some text and probably some images and let it …

How to add 5 random numbers which are less than 10?

I’ve created two functions. One to create 5 random numbers to push them into an array. And another one to sum up the numbers. The random number generator is working and making an array perfectly. But …

Implementing Firebase, giving a “is not a function” error whatever I do

I am trying to improve a question that got a few downvotes yesterday evening. I am still running into the same problem. I am trying to work with Firebase realtime database. However it doesn’t matter …

why my last.addEventListener(“click”,nextLevel) not working?

https://codepen.io/demi-chen/pen/RwGPgxv let last = theLeftSide.lastElementChild last.addEventListener(“click”,nextLevel) console.log(last) =====> it does show ……why …