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closes #3111

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Ilya Kantor 2022-08-14 11:25:47 +03:00
parent 313b174bf1
commit 5d57a04b66
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8
1-js/02-first-steps/15-function-basics/article.md
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@ -206,7 +206,13 @@ function showMessage(from, *!*text = "no text given"*/!*) {
showMessage("Ann"); // Ann: no text given showMessage("Ann"); // Ann: no text given
``` ```
Now if the `text` parameter is not passed, it will get the value `"no text given"` Now if the `text` parameter is not passed, it will get the value `"no text given"`.
The default value also jumps in if the parameter exists, but strictly equals `undefined`, like this:
```js
showMessage("Ann", undefined); // Ann: no text given
```
Here `"no text given"` is a string, but it can be a more complex expression, which is only evaluated and assigned if the parameter is missing. So, this is also possible: Here `"no text given"` is a string, but it can be a more complex expression, which is only evaluated and assigned if the parameter is missing. So, this is also possible: