Why Position Sticky Is Not Working If Followed by Position Absolute Element

Why position:sticky is not working when the element is wrapped inside another one?

position:sticky consider the parent element to behave as it should be. In your case the parent element has its height defined by the sticky element so there is no room for the element to have a sticky behavior

Add border to better see the issue:

.nav-wrapper {
  position: absolute;
  bottom: 0;
  border: 2px solid;
}

.nav-wrapper nav {
  position: sticky;
  top: 0;
}

body {
  min-height:200vh;
}

<div class="nav-wrapper">
  <nav>
    <a href="#">
      <li>Home</li>
    </a>
    <a href="#">
      <li>About</li>
    </a>
  </nav>
</div>

Position sticky not taking effect

The sticky element in your fiddle has no height setting - use a set height to avoid that, then the sticky position works:

https://jsfiddle.net/rocz5nL1/

Why position sticky is not working in my code?

Its because you have overflow-x-hidden in parent . sticky doesn't work if parent overflow is hidden.

{!categorySearch && (
        <div className="max-w-2xl mx-auto z-40 relative  font-metropolis_semibold">
          <div className="sticky top-0">
            <div className=" z-40 bg-white w-full transition-all">
              <div
                id="logo"
                className={
                  logo
                    ? "px-md mt-10 font-medium"
                    : "px-md mt-10 font-medium animate"
                }
              >
                <div className="overflow-x-hidden ">
                  <img
                    src={settings.logo_intro_image_url}
                    alt={settings.name}
                    className="max-w-full object-contain company-logo"
                    style={{ height: settings.logo_height }}
                    id="company-logo"
                  />
                </div>
              </div>
              <div
                className={`${
                  logo
                    ? "shadow-none border-none"
                    : "border-b-2 border-gray-200"
                }`}
              >
                <TopOptions
                  showOption={showOption}
                  setShowOption={setShowOption}
                  addBorder={logo}
                  outlets={outlets}
                  languageLabels={languageLabels}
                  settings={selectedOutlet.settings}
                />
              </div>
            </div>
            {Object.keys(bannerArray).length === 1 ? (
              <div className="w-full px-md border-b-8 border-banner pb-md">
                {bannerArray &&
                  bannerArray.map((banner, index) => {
                    return (
                      <>
                        <PosterSlider
                          key={index}
                          image={banner.image}
                          loadingBanners={loadingBanners}
                          isSingle={Object.keys(bannerArray).length === 1}
                        />
                      </>
                    );
                  })}
              </div>
            ) : (
              <div className="max-h-full h-19.7 hide-scroll px-md flex overflow-x-auto gap-5p border-b-8 border-light-bg-gray">
                {bannerArray &&
                  bannerArray.map((banner, index) => {
                    return (
                      <PosterSlider
                        key={index}
                        image={banner.image}
                        loadingBanners={loadingBanners}
                        isSingle={Object.keys(bannerArray).length === 1}
                      />
                    );
                  })}
              </div>
            )}
            <div className="flex flex-row justify-between items-center px-md my-25p">
              <p className="font-metropolis_regular text-sm break-words">
                {languageLabels.like_to_order}
              </p>
              <img
                src={Search}
                alt="search"
                onClick={() => setCategorySearch(true)}
              />
            </div>
            <div className="grid grid-flow-row w-full grid-cols-2 place-items-center gap-10p px-md pb-20">
              {categoryList.map((category) => {
                // console.log(category);
                return (
                  <Dishes
                    key={category.category_id}
                    category={category}
                    languageLabels={languageLabels}
                    loading={loadingCategories}
                  />
                );
              })}
            </div>
            <BottomNavigation
              languageLabels={languageLabels}
              isLoyalty={settings.enable_reward_points_functionality}
            />
          </div>
        </div>
      )}

Aligning position sticky at the bottom right is not working

Try this:

.chat {
 width: 55px;
 height: 55px;
 position: fixed;
 bottom: 20px;
 left: 20px;
 background: red;
 border: 0;
 }

position: fixed is key element.

My sticky positioned element isn't acting like it should

You're div with the id of main has overflow-x: hidden. That div is the parent of the child that you want sticky and overflow hidden doesn't play well with position: sticky. Remove the overflow-x: hidden css and it works (line #118 in your style.css):

#main{
min-height:100%;
width: 100%;
/* overflow-x: hidden; */ //remove this
}

There's nothing overflowing, anyhow.

How does the position: sticky; property work?

Sticky positioning is a hybrid of relative and fixed positioning. The element is treated as relative positioned until it crosses a specified threshold, at which point it is treated as fixed positioned.

...

You must specify a threshold with at least one of top, right, bottom, or left for sticky positioning to behave as expected. Otherwise, it will be indistinguishable from relative positioning.
[source: MDN]

So in your example, you have to define the position where it should stick in the end by using the top property.

html, body {
  height: 200%;
}

nav {
  position: sticky;
  position: -webkit-sticky;
  top: 0; /* required */
}

.nav-selections {
  text-transform: uppercase;
  letter-spacing: 5px;
  font: 18px "lato", sans-serif;
  display: inline-block;
  text-decoration: none;
  color: white;
  padding: 18px;
  float: right;
  margin-left: 50px;
  transition: 1.5s;
}

.nav-selections:hover {
  transition: 1.5s;
  color: black;
}

ul {
  background-color: #B79b58;
  overflow: auto;
}

li {
  list-style-type: none;
}

<nav>
  <ul align="left">
    <li><a href="#/contact" class="nav-selections" style="margin-right:35px;">Contact</a></li>
    <li><a href="#/about" class="nav-selections">About</a></li>
    <li><a href="#/products" class="nav-selections">Products</a></li>
    <li><a href="#" class="nav-selections">Home</a></li>
  </ul>
</nav>

---

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