What are some examples of JavaScript strict mode?

Can you explain what JavaScript strict mode is?

Sure! JavaScript strict mode is a way to opt in to a restricted variant of JavaScript, which helps catch common coding errors.

What are some examples of how to use strict mode?

You can enable strict mode by adding 'use strict'; at the beginning of a script or a function. For example:

'use strict';

function myFunction() {
    // code here runs in strict mode
}

Are there any benefits to using strict mode?

Yes, strict mode helps prevent the use of undeclared variables, eliminates some silent errors, and makes debugging easier.

Can you show me a specific example of an error caught by strict mode?

Certainly! In strict mode, assigning a value to an undeclared variable will throw an error:

'use strict';

x = 3.14; // ReferenceError: x is not defined