Promise : A Promise is an object representing the eventual completion or failure of an asynchronous operation. A promise is used to handle operations that may take time to complete, like fetching data from a server, […]
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There are many ways a function can be created in JavaScript. 1. Function Declaration A function declaration defines a named function using the ‘function’ keyword. It can be called before or after its definition due
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javascript different operations and properties 1. ‘Length’ The ‘length’ property returns the number of characters in a string. let str = “Hello, World!”; console.log(str.length); // Output : 13 Output : 13 2. ‘charAt()’ The ‘charAt(index)’
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JavaScript provides several powerful methods for working with arrays. These methods can simplify common operations like iteration, filtering, mapping, and reducing arrays. 1. forEach Executes a provided function once for each array element. Useful for
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The Rest (…) and Spread (…) operators were introduced in ES6 to enhance JavaScript’s capabilities for working with function arguments, arrays, and objects. Rest Operator (…) The Rest operator allows you to represent an indefinite
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map() The map() method creates a new array populated with the results of calling a provided function on every element in the calling array. Syntax: callback: Function that produces an element of the new Array,
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Arrow functions, introduced in ES6, provide a more concise syntax for writing function expressions. They also have a lexical this binding, which means they inherit this from the surrounding code context. Syntax The basic syntax
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