How do I determine the state of a toggled element in JQuery?

Answer 1

Simple jQuery code snippets to check if toggle is open or closed. Basically, the current state can be determined by using this test:
1 $(this).is(":hidden").

Another way, as shown in the following example, is by using the data attribute to append a state of ‘open’ or ‘closed’ to the toggle button like so:

if (this.data('state') === 'closed') {
    $('.' + toggleBtnClass).innerText(moreText);
    _this.data('state', 'open'); /*add data to store state*/
} else {
    $('.' + toggleBtnClass).innerText(lessText);
    _this.data('state', 'closed'); /*add data to store state*/
}

To see this in action, check out the jQuery.autoToggles plugin.