JavaScript: Return true if the bottom of the page is visible, false otherwise

JavaScript fundamental (ES6 Syntax): Exercise-261 with Solution

Write a JavaScript program that returns true if the page bottom is visible, false otherwise.

• Use scrollY, scrollHeight and clientHeight to determine if the bottom of the page is visible.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
// Define a function 'bottomVisible' to check if the bottom of the page is visible
const bottomVisible = () =>
  // Check if the sum of the client height of the document element and the scroll Y offset
  // is greater than or equal to the maximum of the scroll height of the document element
  // and the client height of the document element
  document.documentElement.clientHeight + window.scrollY >=
  (document.documentElement.scrollHeight || document.documentElement.clientHeight);

// Check if the bottom of the page is visible
console.log(bottomVisible());

Output:

true

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-261-1 by w3resource (@w3resource) on CodePen.

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