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snippets/once.md

@@ -5,8 +5,9 @@ tags: function,intermediate
 
 Ensures a function is called only once.
 
-Utilizing a closure, use a flag, `called`, and set it to `true` once the function is called for the first time, preventing it from being called again. In order to allow the function to have its `this` context changed (such as in an event listener), the `function` keyword must be used, and the supplied function must have the context applied.
-Allow the function to be supplied with an arbitrary number of arguments using the rest/spread (`...`) operator.
+- Utilizing a closure, use a flag, `called`, and set it to `true` once the function is called for the first time, preventing it from being called again.
+- In order to allow the function to have its `this` context changed (such as in an event listener), the `function` keyword must be used, and the supplied function must have the context applied.
+- Allow the function to be supplied with an arbitrary number of arguments using the rest/spread (`...`) operator.
 
 ```js
 const once = fn => {
@@ -24,4 +25,4 @@ const startApp = function(event) {
   console.log(this, event); // document.body, MouseEvent
 };
 document.body.addEventListener('click', once(startApp)); // only runs `startApp` once upon click
-```
+```