DEV Community: huberto_madalena

simple quiz in javascript

huberto_madalena — Sat, 04 Feb 2023 14:04:12 +0000

<!DOCTYPE html>

quiz

q1. 2+3?

5

8

10

9

q2. 3+3?

6

8

10

9

q3. 2+1?

3

8

10

9

function result()
{
var score =0;
if (document.getElementById('correct1').checked)
{
score++;
}

if (document.getElementById('correct2').checked)
{
score++;
}

if (document.getElementById('correct3').checked)
{
score++;
}

alert("your score is: " +score);

}

Canvas API on Javascript

huberto_madalena — Thu, 02 Feb 2023 12:49:44 +0000

var c = document.getElementById('rect');

var context = c.getContext('2d');

context.fillStyle= '#C0C0C0';
context.fillRect(10,20,180,100);

bootstrap - example with cols

huberto_madalena — Sun, 20 Feb 2022 02:40:16 +0000

Move an object around with JS

huberto_madalena — Mon, 07 Feb 2022 16:38:45 +0000

Use the arrow keys to move the div element specified in the script

Mask Effect on CSS

huberto_madalena — Sat, 05 Feb 2022 14:53:54 +0000

random num in js

huberto_madalena — Wed, 02 Feb 2022 17:49:26 +0000

1-use document.write for output
2- remember that document.write is the print command in other languages
3- you need to floor (round down) the random value to get a valid integer.
4- random is just that, random. it's totally unpredictable. you need to multiply it by a number in order to get a value within the desired range.

exception handling in javascript

huberto_madalena — Wed, 02 Feb 2022 03:14:20 +0000

getting mouse coordinates

huberto_madalena — Wed, 02 Feb 2022 01:36:59 +0000

js factorial

huberto_madalena — Tue, 01 Feb 2022 20:16:29 +0000

function to add up without previously knowing # of elements. use arguments in the for loop

huberto_madalena — Tue, 01 Feb 2022 19:21:16 +0000

functions within a function

huberto_madalena — Tue, 01 Feb 2022 19:15:38 +0000

key to show contents in object with for loop

huberto_madalena — Tue, 01 Feb 2022 14:52:36 +0000