The "use strict" Directive in JavaScript
The "use strict" directive is a feature in JavaScript that was introduced in ECMAScript 5 (ES5). It allows you to enable strict mode in your JavaScript code. When strict mode is enabled, the JavaScript engine applies stricter parsing and error handling rules, helping you write cleaner and more reliable code. Here are some key aspects of strict mode in JavaScript: Safer Code: Strict mode helps catch common coding mistakes and "unsafe" actions in your code. It turns previously silent errors into explicit errors that throw exceptions. This can help you identify and fix issues earlier in the development process. Preventing Global Variables: In non-strict mode, omitting the var, let, or const keyword when declaring a variable can result in the creation of a global variable. Strict mode prevents this and raises an error. Assignment to Immutable Globals: Some global variables, like undefined, are considered read-only in strict mode. Assigning a value to these variable