You can use an array to set the innerHTML of an element to the correct day of the week by first declaring and initializing an array containing the days of the week. For example:

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let days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];

Then you can use the getDay() method to get the index of the day in the array, like so:

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let index = new Date().getDay();

Finally, you can use the calculated index value to access the appropriate day of the week string from the array, and set it as the value of the element's innerHTML:

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document.getElementById("elementId").innerHTML = days[index];

You can find more information on the getDay() here.

An array is a data structure consisting of a set of elements of the same type. Elements in an array are accessed using their numerical indices, which usually begin with 0 at the first element and increase by one for each element in the array. Each element of an array can be referred to as an object, as each object in an array holds a single value. Examples of objects in an array can include strings, integers, booleans, floats, or any other data type.

innerHTML is a JavaScript DOM property that can be used to get or set the HTML contents of an HTML element.

For example, if you wanted to change the content of a <div> or <p> element, you could do so using the innerHTML property, as in this example:

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document.getElementById("example-div").innerHTML = "This is the new content of the div";

This is the same concept as setting the innerText property. The difference is the innerHTML property allows the user to set values that include HTML tags, while the innerText value will not recognize HTML tags.

For more information, checkout this link: MDN Web Docs - innerHTML.

In JavaScript, you can use Math.floor() to round a number down to its nearest integer.

For example:

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let x = 7.82
Math.floor(x) // returns 7

For more information, please see the MDN documentation on Math.floor().

In JavaScript, the Math.round() method can be used to round a number to the nearest integer. For example:

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let num = 1.24;
let roundedNum = Math.round(num);

console.log(roundedNum); // 1

More information on the Math.round() method can be found here.

JSS (JavaScript Syntax Style) is a framework that allows developers to create their own styling format in JavaScript. This can be used to create custom components like buttons. You will need to use functions to properly format your button components using JSS. You can read more about JSS and how to use it for styling buttons here.

Adding an event listener to a button click can be done using JavaScript. The code below will add a listener to the button with the id myButton, and run the myFunction() when the button is clicked.

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document.getElementById("myButton").addEventListener("click", myFunction);

function myFunction() {
  // Your code here
}

More information regarding adding event listeners can be found on the Mozilla Developer Network documentation on event listener.

It depends on the particular situation. Generally speaking, forEach is more convenient to use when iterating over an array, and for loop is better suited for more complex iterative operations over an array. For more explanation, see this resource from Mozilla.

To create a loop using a programming language, you can use a for loop, a while loop, or a do-while loop. Below is an example in Java:

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for(int i = 0; i < 10; i++) {
   System.out.println(i);
}

This loop will start with the variable i equal to 0, then print the variable as long as it is less than 10, then increment the variable by 1 (i++) each time it loops.

In JavaScript, a document is an object that gives access to and manipulates the currently loaded HTML document. It is a part of the window global object, which represents the window of the current web page. A document object is generated by the browser. It is the root node of the document and it provides an interface for manipulation of the document structure like node trees and their contents. The document object also provides access to stylesheet information, such as style rules and linking elements.

Using query selector in JavaScript, you can select an element from the DOM (Document Object Model) by its ID, class, tag name, attributes, or a combination of these.

For example, to select an element with an ID of 'demo':

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const element = document.querySelector('#demo');

To select all elements with class 'test':

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const elements = document.querySelectorAll('.test');

More information can be found in the MDN documentation.

Code smell is a concept in software programming that refers to bad design of code that can make a program difficult to maintain, expand and refactor. Code Smells are usually not bugs, and do not affect the correctness of code, but don’t comply with best practices for writing the code, or making it easier to maintain, such as making the code more concise, efficient and readable. Examples of code smell include long functions, repetitive code, and deep nested looping.

Async/Await is a language construct that allows developers to write asynchronous code more easily. It is built into modern JavaScript (ES2017 and later) and is supported by TypeScript. Async/Await allows developers to write code that looks and behaves synchronously, but is actually asynchronous. This makes it easier for developers to read, write, and reason about their code. More info: MDN: Async functions

Bubbling in the DOM is an event propagation method. It starts with an event triggering on the innermost element and then proceeds to trigger the same event on its parent element and then its parent’s parent element and so on. This behavior is known as bubbling and propagates the same event through different elements on the DOM.

A recursive function is a function that calls itself in its definition. To write a recursive function:

1. Establish a base case – this is a condition that ends the recursive function call when it is met.
2. Establish a recursive case – this is a condition that makes the recursive call, usually calling the same function.

For example, below is a recursive JavaScript function to compute a factorial:

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function factorial(n){
  // Base case
  if (n === 0) {
     return 1;
  }
  // Recursive case
  else {
     return n * factorial(n - 1);
  }
}

You can learn more about recursive functions from this MDN article.

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// write your code here
const axios = require("axios");

axios.get("https://api.openweathermap.org/data/2.5/weather?q=Lisbon&APPID={YOUR_API_KEY}")
  .then(response => {
    const weather = response.data;
    const lon = weather.coord.lon;
    const lat = weather.coord.lat;
    console.log(`The temperature in Lisbon is ${weather.main.temp}^oC`);
  })
  .catch(error => {
    console.log(error);
  });

This code uses the OpenWeatherMap API to get the current temperature in Lisbon. You will need to replace {YOUR_API_KEY} with your API key.

1. Create and save a background image. The background image should be a high-resolution image with a large size.

2. Choose the animation type. Parallax animations can either move forward, in a sidewise motion, or in a 3D-view format. Make a decision on which works best for your project.

3. Test the animation. Make sure the animation runs smoothly and that all of the elements move properly.

4. Adjust the speed