diff --git a/1-js/02-first-steps/16-function-expressions/article.md b/1-js/02-first-steps/16-function-expressions/article.md index 0135cf1c..d502c9d2 100644 --- a/1-js/02-first-steps/16-function-expressions/article.md +++ b/1-js/02-first-steps/16-function-expressions/article.md @@ -90,7 +90,7 @@ Everything would work the same. ````smart header="Why is there a semicolon at the end?" -You might wonder, why does Function Expression have a semicolon `;` at the end, but Function Declaration does not: +You might wonder, why do Function Expressions have a semicolon `;` at the end, but Function Declarations do not: ```js function sayHi() { @@ -144,13 +144,13 @@ function showCancel() { ask("Do you agree?", showOk, showCancel); ``` -In practice, such functions are quite useful. The major difference between a real-life `ask` and the example above is that real-life functions use more complex ways to interact with the user than a simple `confirm`. In the browser, such function usually draws a nice-looking question window. But that's another story. +In practice, such functions are quite useful. The major difference between a real-life `ask` and the example above is that real-life functions use more complex ways to interact with the user than a simple `confirm`. In the browser, such functions usually draw a nice-looking question window. But that's another story. **The arguments `showOk` and `showCancel` of `ask` are called *callback functions* or just *callbacks*.** The idea is that we pass a function and expect it to be "called back" later if necessary. In our case, `showOk` becomes the callback for "yes" answer, and `showCancel` for "no" answer. -We can use Function Expressions to write the same function much shorter: +We can use Function Expressions to write an equivalent, shorter function: ```js run no-beautify function ask(question, yes, no) { @@ -186,7 +186,7 @@ Let's formulate the key differences between Function Declarations and Expression First, the syntax: how to differentiate between them in the code. -- *Function Declaration:* a function, declared as a separate statement, in the main code flow. +- *Function Declaration:* a function, declared as a separate statement, in the main code flow: ```js // Function Declaration