Below are some of the very basic points that has to be known before we start with javascript

Important Points:

• All modern browsers have JavaScript support (including mobile browsers)
• Browsers have their own JavaScript Engine
• JavaScript engine executes the given code
• Implementation and compilation may differ, but the result is the same
• Modern browsers also have Developer Tools
• Debugging capabilities
• Console to display messages and run code snippets
• Network inspection
• Profiling
• DOM browser
• Node.js supports command line execution of JavaScript code