To learn JavaScript or any other programming language, the number one thing you must do is write a lot of code. Learning JavaScript is not possible without loads of repetition and consistent practice. This guide teaches you how to learn JavaScript fast. Of course, you can become a proficient self-taught JavaScript developer at your own …
How to Learn JavaScript Fast — Follow These 7 Steps (in 2022) Read More »
In JavaScript, the dollar sign ($) and underscore (_) are both identifiers—similar to any other name, like myCar or houseAge. You can use a dollar sign or underscore to identify objects, such as: Variables Functions Properties Events Objects Thus, the dollar sign and underscore are not treated like other special symbols (such as the dot) …
JavaScript Dollar Sign ($) and Underscore (_) Explained Read More »
In JavaScript, the double exclamation operator converts an Object to Boolean. This happens such that “falsy” objects become false and “truthy” objects become true. For example: !! 0 –> false !! null –> false !! undefined –> false !! 48 –> true !! “hello” –> true !! [1, 2, 3] –> true This is a …
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To get the current timestamp in JavaScript, call the Date.now() function. For example: Output: If that’s what you were looking for, then thanks for reading! If you are interested, the following sections teach you some insight into the significance of timestamps. You will also learn alternative ways to obtain the current timestamp in JavaScript. What …
To change an HTML class using JavaScript, access the classList attribute of an element and do one of the following: Call the .add() function to add a new class. Call the .remove() function to remove a class. Overwrite the entire classList with your new class name. Here are some examples: Changing the HTML class happens …
In mathematics, the modulo gives you the remainder in the division. To calculate the remainder in the division in JavaScript, use the modulo operator (%). For example: Output: You can interpret this as sharing 10 slices of pizza with 3 eaters. As a result of a fair share, there will be one leftover slice. This …
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In JavaScript, the difference between the == operator and === operator is in how the comparison is made: The == operator checks if the two values are equal without caring about their data type. The === operator checks if the two values are equal given they have the same data type. A great way to …
== vs === in JavaScript: What’s the Difference? (with Examples) Read More »
The main difference between let and var in JavaScript is: var declarations are function-scoped. let declarations are block-scoped. This means you can have multiple let variables with the same name as long as they live in different scopes, such as in different functions. For instance: In addition to this, there is a bunch of important …
“let” vs “var” in JavaScript: A Comprehensive Guide [in 2022] Read More »
In JavaScript, the array is an extremely commonly used data type. You can use an array in a variety of tasks to store and access values with ease. Some common tasks you want to do with arrays include: Adding elements Removing elements Sorting elements Transforming elements Looping elements Copying elements And so much more. The …
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In JavaScript, you can use a for loop to repeat a task based on a condition. As long as the condition is true, the looping continues. When the condition becomes false, the loop terminates. For example, let’s display numbers from 0 to 5 using a for loop: Output: In this particular for loop, the condition …
JavaScript for Loops — A Step-by-Step Guide (Examples) Read More »
