Linked Questions

In the following example, when the button is clicked, cb2 uses the memoized function. However, why doesn’t cb2 use the first render closures (countVal: 0)? function TestHook() { const [count, ...

A closure is basically an inner/nested function. What are some of the most common examples of nested functions in popular js frameworks? In what scenarios would you choose to write a custom closure?

I will use a debounce function as example. const debounce = (func, wait) => { let timeout; return function executedFunction(...args) { const later = () => { clearTimeout(timeout); ...

const throttle = <T extends unknown[]>( callback: (...args: T) => void, delay: number, ) => { // this is not a global variable, just a local variable ?? let isWaiting = false; ...

I'm a web developer, but lots of folks are looking for slightly more advanced skills and understanding closures seems to be at the forefront of this. I get the whole "execution context creating a ...

I understand what a nested function is, but I don't understand why we even need nested functions in the first place. Is there a problem that can only be solved by using nested functions in JavaScript. ...

everyone. I have a problem about the 'callback function - scope of variable', I wanna use the 'i in for loop' to 'the callback function User_UidSearch', but I cannot use it. (I hope the solution ...

I have used JS for two years and my pluralsight accessment rates me as proficient in JS, I understand prototypical inheritance, higher order functions, IIFEs etc and I have used them in real world ...

In the below code, variable text is not accessible in the findTextToDelete function (it generates an error) array = ['a', 'b', 'removeThis', 'c']; removeText("removeThis"); function ...

I'm new to javascript and I'm having trouble using the setInterval() function properly. Basically I want to call a function at different given intervals for different parameters both of which I have ...

I have access to each of the li[i] that returns what you see in the picture. An example would be li[i].innerText returns business. How can I get the checked state of each element? //loop through ...

I would like to know how to pass data by value, rather than by reference, into a then handler on a jQuery Deferred object. I have the following example code to illustrate my question: var value; var ...

I understand that in Javascript a function can return another function and it can be called immediately. But I don't understand the reason to do this. Can someone please explain the reason and benefit ...

In the You Don't Know Javascript series, 1/3 of the way down IIFE's are described as not being closures themselves, but only if they're executed outside their lexical scope: Chapter 3 introduced the ...

A common pitfall with JavaScript closures is running setTimeout() from a for loop, and expecting the counter to be passed with different values at each iteration, while in practice it gets assigned ...