minor fixes

Author: iliakan

1-js/06-advanced-functions/10-bind/article.md

@@ -279,7 +279,7 @@ What if we'd like to fix some arguments, but not the context `this`? For example
 
 The native `bind` does not allow that. We can't just omit the context and jump to arguments.
 
-Fortunately, a helper function `partial` for binding only arguments can be easily implemented.
+Fortunately, a function `partial` for binding only arguments can be easily implemented.
 
 Like this:
 

2-ui/3-event-details/8-onscroll/3-load-visible-img/source.view/index.html

@@ -169,38 +169,8 @@ <h1>Neptune</h1>
      * It's enough that the top or bottom edge of the element are visible
      */
     function isVisible(elem) {
-
-      let coords = elem.getBoundingClientRect();
-
-      let windowHeight = document.documentElement.clientHeight;
-
-      // top elem edge is visible OR bottom elem edge is visible
-      let topVisible = coords.top > 0 && coords.top < windowHeight;
-      let bottomVisible = coords.bottom < windowHeight && coords.bottom > 0;
-
-      return topVisible || bottomVisible;
-    }
-
-    /**
-    A variant of the test that considers the element visible if it's no more than
-    one page after/behind the current screen.
-
-    function isVisible(elem) {
-
-      let coords = elem.getBoundingClientRect();
-
-      let windowHeight = document.documentElement.clientHeight;
-
-      let extendedTop = -windowHeight;
-      let extendedBottom = 2 * windowHeight;
-
-      // top visible || bottom visible
-      let topVisible = coords.top > extendedTop && coords.top < extendedBottom;
-      let bottomVisible = coords.bottom < extendedBottom && coords.bottom > extendedTop;
-
-      return topVisible || bottomVisible;
+      // todo: your code
     }
-    */
 
     function showVisible() {
       for (let img of document.querySelectorAll('img')) {