How To
What is null in Javascript
By Tan Lee Published on Dec 18, 2024 365
In JavaScript, `null` is a special value that represents the intentional absence of any object value.
How to round up in Javascript
By Tan Lee Published on Dec 18, 2024 293
To round up a number in JavaScript, you can use the `Math.ceil()` function.
How to round down in Javascript
By Tan Lee Published on Dec 18, 2024 288
To round down a number in JavaScript, you can use the `Math.floor()` method. This method returns the largest integer less than or equal to the given number.
How to use .reduce() method in Javascript
By Tan Lee Published on Dec 18, 2024 328
The `.reduce()` method in JavaScript is used to reduce an array of values into a single value.
How to use .every() method in Javascript
By Tan Lee Published on Dec 18, 2024 299
The `.every()` method in JavaScript is a built-in array method used to check if every element in an array satisfies a condition specified by a callback function.
What is arrow function in Javascript
By Tan Lee Published on Dec 18, 2024 263
An arrow function in JavaScript is a shorthand syntax for writing function expressions, making functions more concise and readable.
How to use querySelectorAll in Javascript
By Tan Lee Published on Dec 18, 2024 328
The `querySelectorAll` method in JavaScript is used to select multiple elements from the DOM based on a CSS selector. It returns a `NodeList` containing all the elements that match the specified selector.
What is a variable in JavaScript
By Tan Lee Published on Dec 18, 2024 235
In JavaScript, a variable is a named container that holds a value, allowing you to store and manipulate data.
How to use .toLowerCase() function in Javascript
By Tan Lee Published on Dec 18, 2024 253
The `.toLowerCase()` function in JavaScript is used to convert a string to lowercase letters. It is a built-in method that can be applied to any string variable or literal.
What does && mean in JavaScript
By Tan Lee Published on Dec 18, 2024 257
The `&&` is a logical operator in JavaScript, known as the "AND" operator. It is used to check if multiple conditions are true.
How to get emojis in Javascript
By Tan Lee Published on Dec 18, 2024 412
In JavaScript, you can use Unicode characters to display emojis, with each emoji having a specific Unicode value assigned to it.
What is variable hoisting in Javascript
By Tan Lee Published on Dec 18, 2024 291
Variable hoisting refers to how JavaScript automatically moves the declarations of variables to the top of their containing scope during the execution phase, while the initialization remains in its original position.
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