From the course: Learning ECMAScript 6+ (ES6+)
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Setting default function parameters - JavaScript Tutorial
From the course: Learning ECMAScript 6+ (ES6+)
Setting default function parameters
- [Instructor] There might be situations where you want to provide default values for your functions parameters. And with modern JavaScript, you can. So let's create a really basic function that adds a couple of numbers together. The function add will take in X and Y and then just console log the addition of X and Y to our console. Now, if I call the add function without passing in any values, it's going to return not a number. So you could fix this by adding numbers to your parameters, or you could also add defaults in case they were not supplied. So I'm going to say X equals five, Y equals six, and this will log 11 to the console. Now, what happens if I do add numbers? If I do pass values to a function that already has default parameters defined. Well, not surprisingly, whatever we pass in is going to override whatever is the default. Let's take a look at another type of function called haveFun. So haveFun…
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