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ja5on
10,338 PointsFunctions as Parameters?
are these just called Functions as Parameters? or are they called something else? because I can find other functions in my books but not these type
3 Answers
Peter Vann
36,427 PointsOi jas0n!
I'm good. I got an appointment for my first Covid shot on Tuesday morning!?!
And I'm still rewatching Resident Alien over and over!?! LOL
So what has you the most tripped-up on the DOM stuff?!?
As far as pushing through (coping with something that seems beyond my ability):
Sometimes I just have to take a break and clear my head and return to it with fresh eyes. Other times I turn to as much 3rd-party resources as I can to round out my understanding of the material.
For the record, I struggled with understanding DOM manipulation at first, too, though. I'm way better at it now than I used to be. I'll admit that DOM transversal can be very confusing.
Some more resources on DOM stuff:
https://www.youtube.com/watch?v=Bkc7AUQ6uU4&t=130s (Derek Banas YT video on the DOM)
https://www.w3schools.com/js/js_htmldom.asp
https://www.freecodecamp.org/news/how-to-manipulate-the-dom-beginners-guide/
https://www.tutorialrepublic.com/javascript-tutorial/javascript-dom-manipulation.php
https://www.youtube.com/watch?v=y17RuWkWdn8
https://www.youtube.com/results?search_query=dom+transversal
https://fundamentals.generalassemb.ly/11_unit/dom-cheatsheet.html
https://websitesetup.org/javascript-cheat-sheet/
https://oscarotero.com/jquery/ (Note: THIS IS FOR JQuery and NOT vanilla JavaScript)
I also recommend just getting onto JS playgrounds, such as the ones listed here:
https://dev.to/vuelancer/free-online-code-playground-for-html-css-javascript-3kk4
And just running experiments and fully mess with the DOM (get your hands dirty)!?!
As usual, I hope that helps.
Stay safe and happy coding!
BTW, are you familiar with "Joking Apart"?!? OMG - that show has some pretty funny scenes, too!?!
There are a few really funny clips on YouTube!?! LOL
Peter Vann
36,427 PointsHi Jas0n!
We meet again!?!
To me, a "function as a parameter" is just that, and it's not anything new or special - just a plain old JS function. But as a passes-in parameter/argument, its execution is effectively delayed until the function it was passed into executes (such in the case of when passed into an event listener as a callback function.)
I can't remember if I shared this example with you before or not:
const square = num => num * num;
const toTheSecondPower = (func, num) => { // func is a function passed as a parameter
return func(num) * func(num); // func doesn't excute until toTheSecondPower is called
}
console.log( toTheSecondPower(square, 3) ); // square is a function passed as an argument
This logs 81 to the console.
And square is a function as a parameter that executes inside the toTheSecondPower function.
toTheSecond Power effectively, in this case (because the function passed in is square) returns:
square(3) * square(3) // 81
But you could just as easily have this:
const cube = num => num * num * num;
const toTheSecondPower = (func, num) => { // func is a function passed as a parameter
return func(num) * func(num); // func doesn't excute until toTheSecondPower is called
}
console.log( toTheSecondPower(cube, 3) ); // cube is instead the function passed as an argument
Which will log 729 to the console.
toTheSecond Power effectively, in this case (because the function passed in is cube) returns:
cube(3) * cube(3) // 729
I hope that helps.
Stay safe and happy coding!
ja5on
10,338 Pointshi Peter! I'm trying to do fourth stage of the DOM been stuck in DOM stuff for over a month, how do you cope with something that seems beyond your ability?
How are you by the way?
ja5on
10,338 Pointsja5on
10,338 PointsHi Peter!
I was wondering with the DOM I heard innerHTML is unsafe? So do I use textContent or innerHTML? I found this on google:- textContents is all text contained by an element and all its children that are for formatting purposes only. innerText returns all text contained by an element and all its child elements. innerHtml returns all text, including html tags, that is contained by an element. While the above is probably true is innerHTML still used? I'm not very advanced yet on DOM but I have started reading one of your links on the DOM in w3schools, once completed I will read mdn DOM info, thanks for your help.