1. Why Video caption is important on your website? Suppose you are in a library and need to see a tutorial video and you have no ear-phone right now. In this situation, how can you understand the tutorial without audio? Or think about someone who is unable to hear. Here video caption plays an important role. …

1. Markup Language Browser uses Markup languages to show UI. Markup language specifies code in a text file. It defines the layout how text, images and styles are displayed in your browser. Example : HTML — Hypertext Markup Language SGML — Standard Generalized Markup Language XHTML — eXtensible Hypertext Markup Language XML —…

Spread operator vs rest parameter The spread operator unpacks elements of iterable objects such as arrays, sets, and maps into a list. The spread operator can be used to clone an iterable object or merge iterable objects into one. The rest parameter is also denoted by three dots (…). However…

1. JS String : indexOf( ) Takes a string as a parameter that can be called “searchTerm”. Returns the first occurrence of the index where the “searchTerm” stands. It can take an integer number as the second parameter from where searching the “searchTerm” will be started. It’s Default value is 0. const sentence= ‘I am indexOf’; …