Accept data-bs-body option in the configuration object as well (#33248)

* Accept data-bs-body option in the configuration object as well

Tweak jqueryInterface, add some more tests

* Fix Markdown table formatting and tweak the wording on backdrop

Co-authored-by: Mark Otto <markdotto@gmail.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

js/src/util/index.js

@@ -153,6 +153,22 @@ const isVisible = element => {
   return false
 }
 
+const isDisabled = element => {
+  if (!element || element.nodeType !== Node.ELEMENT_NODE) {
+    return true
+  }
+
+  if (element.classList.contains('disabled')) {
+    return true
+  }
+
+  if (typeof element.disabled !== 'undefined') {
+    return element.disabled
+  }
+
+  return element.getAttribute('disabled') !== 'false'
+}
+
 const findShadowRoot = element => {
   if (!document.documentElement.attachShadow) {
     return null
@@ -226,6 +242,7 @@ export {
   emulateTransitionEnd,
   typeCheckConfig,
   isVisible,
+  isDisabled,
   findShadowRoot,
   noop,
   reflow,