On Page

Check if a given element exists on the page. Perform callbacks for both true or false and add delays on those callbacks.

Installation

NPM

npm i on-page-checker

Yarn

yarn add on-page-checker

Bower

bower install on-page-checker

Usage

If given element exists on the page, returns element object. Otherwise returns false boolean

$('.element').onPage();

Call a function if the element exists on the page. You can refer to this for the element object (if it exists).

$('.element').onPage(function() {
  console.log('.element is on this page', this);
});

If the element exitst on the page, return the fallback function as above. If it does not exists, call the second function argument.

$('.element').onPage(function() {
  console.log('.element is on this page', this);
}, function() {
  console.log('.element is NOT on this page');
});

You can delay the callbacks by adding a unit as the first argument.

$('.element').onPage(3000, function() {
  console.log('.element is on this page', this);
});

TODO

To make the callbacks trigger only after the element check has been delayed, add true to the argument list. This is designed to be used if you expect an elements to be added to the DOM programmatically.

$('.element').onPage(3000, true, function() {
  console.log('.element is on this page', this);
});

All of the above works as above, only the callback functions will be triggered in reverse order

$('.element').notOnPage( ... );