What is strict mode in JavaScript and why is it useful?
Asked on Jul 20, 2024
Answer
Strict mode in JavaScript is a way to opt into a restricted variant of JavaScript, which helps you write cleaner code by catching common coding errors and preventing the use of certain problematic features.
<!-- BEGIN COPY / PASTE -->
"use strict";
function exampleFunction() {
// This will throw an error because x is not declared
x = 3.14;
}
exampleFunction();
<!-- END COPY / PASTE -->Additional Comment:
✅ Answered with JavaScript best practices.- Strict mode is enabled by placing "use strict"; at the beginning of a script or a function.
- It helps in catching common mistakes such as assigning values to undeclared variables.
- It prevents the use of certain JavaScript features that are considered problematic or deprecated.
- Using strict mode can make your code more secure and robust by enforcing better coding practices.
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