1. Object value settings or Initialisation in JavaScript 1. Dot Operator var objPerson = new Object(); objPerson.FirstName = 'John'; objPerson.LastName = 'Brad'; objPerson.Age = 1969; 2. Object Initialiser - comma-delimited ....
Arrow functions also called “fat arrow” functions are a more concise syntax for writing function expressions. Arrow functions were introduced with ES6 as a new syntax for writing JavaScript functions.fat ....
Backslash and the following character form an escape sequence that represents special characters. Below a list of several useful escape sequences: ‘ - single quote ” - double quote – ....
Sample Code: var numberObject = 123.4567; document.write( numberObject.toFixed() ); // 123 document.write( numberObject.toFixed( 1 ) ); // 123.5 document.write( numberObject.toFixed( 2 ) ); // 123. 46 document.write( numberObject.toFixed( 3 ) ....
for-in The for-in loop iterates over all the enumerable properties of an object. In each iteration the name of the property is stored in the variable. Syntax: for (variable in ....
Use the below links for preparation. Study the topics related to your certification. What is the Difference between var and let in JavaScript? - https://www.infallibletechie.com/2019/07/what-is-difference-between-var-and-let.html Difference between null and undefined in ....
Symbols are new primitive type added in ECMAScript 2015. Symbols do not have a literal syntax, they have a Symbol() function that can be used to create them. Symbols are ....
null and undefined are similar and both mean an absence of value. They are considered equal by the equality operator (==). console.log(null == undefined); // true To distinguish them the ....
var is a function-scoped. It can be re-declared.let is a block-scoped. It can be used in for loops, while loops, if blocks. It cannot be re-declared.Best Practice:Do not use var ....
Sample Code: var value = '11111111911; String s = value.charAt(8); //return 9 Note: Index starts at 0. Cheers!!!