why am I receiving npm error 404 when trying to launch a new app?

what does setInterval(() mean?

Explain how == and === are different in JavaScript.

what is Node.js

how to get milliseconds in javascript

how does return in JS work

what is the difference between let, var and const

how to create a function javascript

what does === mean in javascript

what is split() in javascript?

what Object.values() does in javascript?

What does .length mean in javascript

what is arrow function in JS

What is a falsy value in js?

how to use switch in js?

how does for loop work in js

How to use getElementById() in js

What is ternary operator in js

const toggleInfo = (index, event) => {
    setVisibleLightIndexes((prev) => {
      if (prev.includes(index)) {
        return prev.filter((i) => i !== index);
      } else {
        return [...prev, index];
      }
    });
const clickedElement = event.target.closest(".chauvetLights");
if (clickedElement) {
  clickedElement.classList.toggle("expanded");
}
 toggleBackgroundColor(event);
  };
TypeError: Cannot read properties of undefined (reading 'target')
    at k (home-OO3WpeNb.js:1:102576)
    at onClick (home-OO3WpeNb.js:1:104620)
    at Object.Em (index-h-qGlws7.js:38:9852)
    at km (index-h-qGlws7.js:38:10006)
    at Cm (index-h-qGlws7.js:38:10063)
    at Wa (index-h-qGlws7.js:38:31422)
    at fd (index-h-qGlws7.js:38:31839)
    at index-h-qGlws7.js:38:36751
    at Vs (index-h-qGlws7.js:41:36768)
    at Df (index-h-qGlws7.js:38:8988)

what does !== mean in javascript?

how to get the input's value with a button

Write a for loop that prints every third number from 0 up to and including 99 using console.log

how to set counter

what is the time complexity of unshifting method

What is variable hoisting in javascript?

how to get emojis

Add a value attribute to both radio buttons. For convenience, set the button's value attribute to the same value as its id attribute.

Explain the difference between == and === in JavaScript

What does && mean in JavaScript

What is the .toLowerCase() function used for in JavaScript?

What is a variable in JavaScript?

what does an async function do?

how to use querySelectorAll ?

can you explain arrow functions?

what is null in js

.every() method in js

explain .reduce() method in js

how to round down using javascript

how to round up using javascript

What is the difference between undefined and null in JavaScript?

what is a console.log?

Can you explain JS functions return to me?

can you explain switch statements in javascript

How do I declare an array in JavaScript?

what is .join method in javascript

What is the purpose of using the let keyword in JavaScript?

what is the difference between let and const

What is a recursive function?

how do you get the system to ignore spaces in the response to a prompt question js

What character defines or gives access to jQuery?

how to comment on javascript