'JavaScript Strict Mode vs. Bad Programming Practices' javascript javascriptdevelopment
at the top of the script. For functions, you would putfunction example { "use strict" return "this is an example function" }converting mistakes into errors
Regular or "sloppy mode" JavaScript will allow a number of mistakes to pass by without causing any error messages. As mentioned earlier, this can make debugging difficult if your code stops working as you intend it.orkeywords. In regular JavaScript, this would create a variable in the global scope and would continue to work. However, it's not the behavior we want. It creates the risk that you could misspell a variable and accidentally create a new variable.
let number=10; //misspelled variable will create new global variable // where the desired behavior is to update number variable numbr=20 console.log //10Another mistake that won't show up in regular JavaScript is assigning a value to a non-writeable variable. An example of a non-writeable variable is