[JavaScript] - How to add borders to images within an if | SheCodes

[JavaScript] - How to add borders to images within an if else statement in JavaScript

Learn how to add borders to images based on their orientation using if else statement in JavaScript. Also, see how to style borders in CSS.

👩‍💻 HTML, CSS and JavaScript Code instructions

how to add borders to images within an if else statement in script

🤖 SheCodes Athena says:

Answered in 3.85 seconds

Here's an example code for adding borders to images within an if else statement in JavaScript:

javascript
Copy code
// Get the image element var image = document.getElementById("myImage"); // Check if the image is landscape or portrait if (image.width > image.height) { // If landscape, add a red border image.style.border = "5px solid red"; } else { // If portrait, add a blue border image.style.border = "5px solid blue"; }

You can customize the border style and color according to your preferences. Make sure to replace "myImage" with the ID of your image element in the HTML code.

In CSS, you can also set the border for all images in your HTML using the following code:

css
Copy code
img { border: 5px solid black; }

This will add a 5px black border to all images within your HTML file. You can also customize the CSS properties such as the border-style, border-width, and border-color.

More coding questions about JavaScript

👩‍💻 Technical question

how to use trim in js

🤖 SheCodes Athena says:

Answered in 7.27 seconds

In JavaScript, the trim() method is used to remove whitespace from both ends of a string. This is useful when you want to clean up user input.

Here's how you can use it:

javascript
Copy code
let myString = " Hello, World! "; let trimmedString = myString.trim(); console.log(trimmedString); // "Hello, World!"

In this example, trim() removes the spaces before "Hello," and after "World!" and gives us a clean string.

You can find more information about string methods in JavaScript here.

👩‍💻 Technical question

What is const

🤖 SheCodes Athena says:

Answered in 2.25 seconds

const is a keyword in JavaScript that is used to declare a variable whose value cannot be changed (or reassigned) after it is defined. It stands for "constant". This means that once you set a value to a variable using const, you cannot change that value later in the code.

Here's a simple example:

javascript
Copy code
const pi = 3.14; console.log(pi); // Outputs: 3.14 // This line would cause an error because you cannot reassign a constant variable // pi = 3.14159; // Uncaught TypeError: Assignment to constant variable.

For more information, you can check the MDN Web Docs on const.

👩‍💻 Technical question

Math functions in js

🤖 SheCodes Athena says:

Answered in 4.78 seconds

In JavaScript, you can use built-in math functions to perform various mathematical operations. Here are some common ones:

  1. Math.abs() - Returns the absolute value of a number.

    javascript
    Copy code
    console.log(Math.abs(-5)); // Output: 5
  2. Math.round() - Rounds a number to the nearest integer.

    javascript
    Copy code
    console.log(Math.round(4.7)); // Output: 5
  3. Math.max() - Returns the largest of the numbers given as arguments.

    javascript
    Copy code
    console.log(Math.max(1, 2, 3, 4)); // Output: 4
  4. Math.min() - Returns the smallest of the numbers given as arguments.

    javascript
    Copy code
    console.log(Math.min(1, 2, 3, 4)); // Output: 1
  5. Math.sqrt() - Returns the square root of a number.

    javascript
    Copy code
    console.log(Math.sqrt(16)); // Output: 4
  6. Math.random() - Returns a floating-point, pseudorandom number between 0 (inclusive) and 1 (exclusive).

    javascript
    Copy code
    console.log(Math.random()); // Output: A random number between 0 and 1

You can check the MDN Web Docs - Math for more information and additional math functions available in JavaScript.

👩‍💻 Technical question

what does setInterval(() mean?

🤖 SheCodes Athena says:

Answered in 3.36 seconds

setInterval() is a function in JavaScript that allows you to repeatedly execute a piece of code at a specified time interval. It takes two arguments: the first is a function to run, and the second is the time in milliseconds between each execution.

Here’s a simple example:

javascript
Copy code
let count = 0; const intervalId = setInterval(() => { count++; console.log(count); // This will log the number every second }, 1000); // Executes every 1000 milliseconds (1 second)

In this example, the number will increase by one every second and be logged to the console. To stop the interval, you can use clearInterval(intervalId); where intervalId is the identifier returned by setInterval().

For more information, you can refer to the MDN web docs on setInterval.

👩‍💻 Technical question

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

🤖 SheCodes Athena says:

Answered in 3.11 seconds

In JavaScript, == and === are both comparison operators, but they work differently:

  • == is the equality operator. It checks if two values are equal, but it performs type conversion if the values are of different types. For example:
javascript
Copy code
console.log(5 == '5'); // true, because '5' is converted to a number
  • === is the strict equality operator. It checks if two values are equal and of the same type. No type conversion occurs. For example:
javascript
Copy code
console.log(5 === '5'); // false, because the types are different (number vs string)

In summary, use == when you want to check for equality regardless of type, and use === when you want to check for equality and ensure the types match. It is generally recommended to use === to avoid unexpected results due to type conversion.

👩‍💻 Technical question

what is Node.js

🤖 SheCodes Athena says:

Answered in 2.75 seconds

Node.js is an open-source, cross-platform runtime environment that allows you to run JavaScript code on the server side. This means you can build server applications using JavaScript, which is traditionally a client-side language.

Here's a simple example of a Node.js server:

javascript
Copy code
const http = require('http'); const server = http.createServer((req, res) => { res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello, World!\n'); }); const PORT = 3000; server.listen(PORT, () => { console.log(`Server running at http://localhost:${PORT}/`); });

In this code, we create a basic web server that responds with "Hello, World!" when accessed. You can run this code using Node.js to see it in action. For more information, you can visit the Node.js website.

👩‍💻 Technical question

how to get milliseconds in javascript

🤖 SheCodes Athena says:

Answered in 2.4 seconds

To get the current time in milliseconds in JavaScript, you can use the Date.now() method or the getTime() method of a Date object. Both will give you the number of milliseconds since January 1, 1970, 00:00:00 UTC.

Here’s how to do it using both methods:

Using Date.now():

javascript
Copy code
let currentMilliseconds = Date.now(); console.log(currentMilliseconds);

Using new Date() and getTime():

javascript
Copy code
let currentMilliseconds = new Date().getTime(); console.log(currentMilliseconds);

Both of these will output the current time in milliseconds. You can try running these in your browser's console.

👩‍💻 Technical question

how does return in JS work

🤖 SheCodes Athena says:

Answered in 2.94 seconds

In JavaScript, the return statement is used to stop the execution of a function and send a value back to where the function was called. When a function executes a return statement, it exits right away, and any code after that return is not executed.

Here's a simple example:

javascript
Copy code
function add(a, b) { return a + b; // This will return the sum of a and b } let result = add(3, 4); // Calling the function with 3 and 4 console.log(result); // This will print 7

In this example, the function add takes two parameters a and b, and it returns their sum. When we call add(3, 4), it computes 3 + 4, returns 7, and we store that value in result, which we then print to the console.

You can learn more about functions in MDN Web Docs.

👩‍💻 Technical question

what is the difference between let, var and const

🤖 SheCodes Athena says:

Answered in 5.06 seconds

In JavaScript, let, var, and const are used to declare variables, but they have some important differences:

  • var: This is the old way of declaring variables. Variables declared with var are function-scoped, meaning they are only accessible within the function they were declared in. If declared outside a function, they become global. var can also be re-declared and updated.
javascript
Copy code
var x = 10; x = 20; // Allowed var x = 30; // Allowed
  • let: This is a newer way to declare variables. Variables declared with let are block-scoped, meaning they are only accessible within the block {} they were declared in. They can be updated but not re-declared in the same block.
javascript
Copy code
let y = 10; y = 20; // Allowed // let y = 30; // Not allowed in the same block
  • const: This is used for constants. Variables declared with const are also block-scoped and cannot be updated or re-declared. However, if the constant is an object or array, its properties or elements can still be changed.
javascript
Copy code
const z = 10; // z = 20; // Not allowed const arr = [1, 2, 3]; arr.push(4); // Allowed, we can modify the array

In summary:

  • Use var for function-scoped variables.
  • Use let for block-scoped variables that can change.
  • Use const for block-scoped variables that won't change.

👩‍💻 Technical question

how to create a function javascript

👩‍💻 Technical question

what does === mean in javascript

👩‍💻 Technical question

what is split() in javascript?

👩‍💻 Technical question

what Object.values() does in javascript?

👩‍💻 Technical question

What does .length mean in javascript

👩‍💻 Technical question

what is arrow function in JS

👩‍💻 Technical question

What is a falsy value in js?

👩‍💻 Technical question

how to use switch in js?

👩‍💻 Technical question

how does for loop work in js

👩‍💻 Technical question

How to use getElementById() in js

👩‍💻 Technical question

What is ternary operator in js

👩‍💻 Technical question

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)

👩‍💻 Technical question

what does !== mean in javascript?

👩‍💻 Technical question

how to get the input's value with a button

👩‍💻 Technical question

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

👩‍💻 Technical question

how to set counter

👩‍💻 Technical question

what is the time complexity of unshifting method

👩‍💻 Technical question

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

👩‍💻 Technical question

What is variable hoisting in javascript?

👩‍💻 Technical question

how to get emojis

👩‍💻 Technical question

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

👩‍💻 Technical question

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

👩‍💻 Technical question

What does && mean in JavaScript

👩‍💻 Technical question

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

👩‍💻 Technical question

What is a variable in JavaScript?

👩‍💻 Technical question

what does an async function do?

👩‍💻 Technical question

how to use querySelectorAll ?

👩‍💻 Technical question

what is null in js

👩‍💻 Technical question

.every() method in js

👩‍💻 Technical question

explain .reduce() method in js

👩‍💻 Technical question

how to round down using javascript

👩‍💻 Technical question

how to round up using javascript

👩‍💻 Technical question

What is the difference between undefined and null in JavaScript?

👩‍💻 Technical question

what is a console.log?

👩‍💻 Technical question

Can you explain JS functions return to me?

👩‍💻 Technical question

can you explain switch statements in javascript

👩‍💻 Technical question

How do I declare an array in JavaScript?

👩‍💻 Technical question

what is .join method in javascript

👩‍💻 Technical question

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

👩‍💻 Technical question

what is the difference between let and const