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public/assets/sweetalert2/src/instanceMethods/_destroy.js

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+import globalState from '../globalState.js'
+import privateMethods from '../privateMethods.js'
+import privateProps from '../privateProps.js'
+
+/**
+ * Dispose the current SweetAlert2 instance
+ * @this {SweetAlert}
+ */
+export function _destroy() {
+  const domCache = privateProps.domCache.get(this)
+  const innerParams = privateProps.innerParams.get(this)
+
+  if (!innerParams) {
+    disposeWeakMaps(this) // The WeakMaps might have been partly destroyed, we must recall it to dispose any remaining WeakMaps #2335
+    return // This instance has already been destroyed
+  }
+
+  // Check if there is another Swal closing
+  if (domCache.popup && globalState.swalCloseEventFinishedCallback) {
+    globalState.swalCloseEventFinishedCallback()
+    delete globalState.swalCloseEventFinishedCallback
+  }
+
+  if (typeof innerParams.didDestroy === 'function') {
+    innerParams.didDestroy()
+  }
+  globalState.eventEmitter?.emit('didDestroy')
+  disposeSwal(this)
+}
+
+/**
+ * @param {SweetAlert} instance
+ */
+const disposeSwal = (instance) => {
+  disposeWeakMaps(instance)
+  // Unset this.params so GC will dispose it (#1569)
+  // @ts-ignore
+  delete instance.params
+  // Unset globalState props so GC will dispose globalState (#1569)
+  delete globalState.keydownHandler
+  delete globalState.keydownTarget
+  // Unset currentInstance
+  delete globalState.currentInstance
+}
+
+/**
+ * @param {SweetAlert} instance
+ */
+const disposeWeakMaps = (instance) => {
+  // If the current instance is awaiting a promise result, we keep the privateMethods to call them once the promise result is retrieved #2335
+  if (instance.isAwaitingPromise) {
+    unsetWeakMaps(privateProps, instance)
+    instance.isAwaitingPromise = true
+  } else {
+    unsetWeakMaps(privateMethods, instance)
+    unsetWeakMaps(privateProps, instance)
+
+    // @ts-ignore
+    delete instance.isAwaitingPromise
+    // Unset instance methods
+    // @ts-ignore
+    delete instance.disableButtons
+    // @ts-ignore
+    delete instance.enableButtons
+    // @ts-ignore
+    delete instance.getInput
+    // @ts-ignore
+    delete instance.disableInput
+    // @ts-ignore
+    delete instance.enableInput
+    // @ts-ignore
+    delete instance.hideLoading
+    // @ts-ignore
+    delete instance.disableLoading
+    // @ts-ignore
+    delete instance.showValidationMessage
+    // @ts-ignore
+    delete instance.resetValidationMessage
+    // @ts-ignore
+    delete instance.close
+    // @ts-ignore
+    delete instance.closePopup
+    // @ts-ignore
+    delete instance.closeModal
+    // @ts-ignore
+    delete instance.closeToast
+    // @ts-ignore
+    delete instance.rejectPromise
+    // @ts-ignore
+    delete instance.update
+    // @ts-ignore
+    delete instance._destroy
+  }
+}
+
+/**
+ * @param {Record<string, WeakMap<any, any>>} obj
+ * @param {SweetAlert} instance
+ */
+const unsetWeakMaps = (obj, instance) => {
+  for (const i in obj) {
+    obj[i].delete(instance)
+  }
+}