diff --git a/src/structs/ContentFormat.js b/src/structs/ContentFormat.js
index eb2bd0ee..631e7755 100644
--- a/src/structs/ContentFormat.js
+++ b/src/structs/ContentFormat.js
@@ -67,24 +67,24 @@ export class ContentFormat {
    */
   integrate (_transaction, item) {
     // @todo searchmarker are currently unsupported for rich text documents
-    const p = /** @type {YText} */ (item.parent)
+    const p = /** @type {YText<any>} */ (item.parent)
     p._searchMarker = null
     p._hasFormatting = true
   }
 
   /**
-   * @param {Transaction} transaction
+   * @param {Transaction} _transaction
    */
-  delete (transaction) {}
+  delete (_transaction) {}
   /**
-   * @param {StructStore} store
+   * @param {StructStore} _store
    */
-  gc (store) {}
+  gc (_store) {}
   /**
    * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
-   * @param {number} offset
+   * @param {number} _offset
    */
-  write (encoder, offset) {
+  write (encoder, _offset) {
     encoder.writeKey(this.key)
     encoder.writeJSON(this.value)
   }
diff --git a/src/types/AbstractType.js b/src/types/AbstractType.js
index b9b1b44f..ac81ec7e 100644
--- a/src/types/AbstractType.js
+++ b/src/types/AbstractType.js
@@ -22,10 +22,10 @@ import * as math from 'lib0/math'
 import * as log from 'lib0/logging'
 
 /**
- * @typedef {delta.ArrayDelta|delta.TextDelta|{ children: delta.ArrayDelta<Array<YXmlDeepContent>> }|{ children: delta.ArrayDelta, attributes: {[key:string]:{ value: any, prevValue: any, attribution: import('../utils/AttributionManager.js').Attribution } } }} YXmlDeepContent
+ * @typedef {delta.ArrayDelta<any>|delta.TextDelta<any>|{ children: delta.ArrayDelta<Array<YXmlDeepContent>> }|{ children: delta.ArrayDelta<any>, attributes: {[key:string]:{ value: any, prevValue: any, attribution: import('../utils/AttributionManager.js').Attribution } } }} YXmlDeepContent
  */
 /**
- * @typedef {delta.ArrayDelta|delta.TextDelta|{ children: delta.ArrayDelta<Array<DeepContent>> }|{ children: delta.ArrayDelta, attributes: {[key:string]:{ value: any, prevValue: any, attribution: import('../utils/AttributionManager.js').Attribution} } }} DeepContent
+ * @typedef {delta.ArrayDelta<any>|delta.TextDelta<any>|{ children: delta.ArrayDelta<Array<DeepContent>> }|{ children: delta.ArrayDelta<any>, attributes: {[key:string]:{ value: any, prevValue: any, attribution: import('../utils/AttributionManager.js').Attribution} } }} DeepContent
  */
 
 /**
diff --git a/src/types/YText.js b/src/types/YText.js
index 79491279..f556bcba 100644
--- a/src/types/YText.js
+++ b/src/types/YText.js
@@ -755,8 +755,8 @@ export class YTextEvent extends YEvent {
  * block formats (format information on a paragraph), embeds (complex elements
  * like pictures and videos), and text formats (**bold**, *italic*).
  *
- * @template {any} Embeds
- * @extends AbstractType<YTextEvent>
+ * @template {{ [key:string]:any } | AbstractType<any>} [Embeds={ [key:string]:any } | AbstractType<any>]
+ * @extends AbstractType<YTextEvent<Embeds>>
  */
 export class YText extends AbstractType {
   /**
@@ -804,6 +804,9 @@ export class YText extends AbstractType {
     this._pending = null
   }
 
+  /**
+   * @return {YText<Embeds>}
+   */
   _copy () {
     return new YText()
   }
@@ -816,6 +819,9 @@ export class YText extends AbstractType {
    * @return {YText<Embeds>}
    */
   clone () {
+    /**
+     * @type {YText<Embeds>}
+     */
     const text = new YText()
     text.applyDelta(this.getContent())
     return text
@@ -944,6 +950,9 @@ export class YText extends AbstractType {
    */
   getContent (am = noAttributionsManager) {
     this.doc ?? warnPrematureAccess()
+    /**
+     * @type {delta.TextDelta<Embeds>}
+     */
     const d = delta.createTextDelta()
     /**
      * @type {Array<import('../internals.js').AttributedContent<any>>}
diff --git a/src/utils/AttributionManager.js b/src/utils/AttributionManager.js
index ecdf61e7..8f10ece0 100644
--- a/src/utils/AttributionManager.js
+++ b/src/utils/AttributionManager.js
@@ -11,8 +11,7 @@ import {
   diffIdMap,
   createIdMap,
   createAttributionItem,
-  mergeIdMaps,
-  AttributionItem
+  mergeIdMaps
 } from '../internals.js'
 
 import * as error from 'lib0/error'
diff --git a/src/utils/Delta.js b/src/utils/Delta.js
index f8ff0089..d7a9b8a5 100644
--- a/src/utils/Delta.js
+++ b/src/utils/Delta.js
@@ -5,17 +5,17 @@ import * as error from 'lib0/error'
 
 /**
  * @template {any} ArrayContent
- * @template {{[key: string]: any}} Embeds
+ * @template {object} Embeds
  * @typedef {InsertStringOp|InsertEmbedOp<Embeds>|InsertArrayOp<ArrayContent>|RetainOp|DeleteOp} DeltaOp
  */
 
 /**
- * @template {{[key: string]: any}} Embeds
+ * @template {object} Embeds
  * @typedef {InsertStringOp|InsertEmbedOp<Embeds>|RetainOp|DeleteOp} TextDeltaOp
  */
 
 /**
- * @template {any} ArrayContent
+ * @template ArrayContent
  * @typedef {InsertArrayOp<ArrayContent>|RetainOp|DeleteOp} ArrayDeltaOp
  */
 
@@ -101,7 +101,7 @@ export class InsertArrayOp {
 }
 
 /**
- * @template {{[key: string]: any}} Embeds
+ * @template {object} Embeds
  */
 export class InsertEmbedOp {
   /**
@@ -274,8 +274,8 @@ const mergeAttrs = (a, b) => {
 }
 
 /**
- * @template {'array' | 'text' | 'custom'} [Type='custom']
- * @template {DeltaOp<any,any>} [TDeltaOp=DeltaOp<any,any>]
+ * @template {'array' | 'text' | 'custom'} Type
+ * @template {DeltaOp<any,any>} TDeltaOp
  * @extends AbstractDelta<Type,TDeltaOp>
  */
 export class DeltaBuilder extends AbstractDelta {
@@ -353,7 +353,7 @@ export class DeltaBuilder extends AbstractDelta {
   }
 
   /**
-   * @param {(TDeltaOp extends TextDelta<infer Embeds> ? string | Embeds : never) | (TDeltaOp extends InsertArrayOp<infer Content> ? Array<Content> : never) } insert
+   * @param {(TDeltaOp extends InsertStringOp ? string : never) | (TDeltaOp extends InsertEmbedOp<infer Embeds> ? (Embeds) : never) | (TDeltaOp extends InsertArrayOp<infer Content> ? Array<Content> : never) } insert
    * @param {FormattingAttributes?} attributes
    * @param {Attribution?} attribution
    * @return {this}
@@ -362,6 +362,7 @@ export class DeltaBuilder extends AbstractDelta {
     const mergedAttributes = mergeAttrs(this.usedAttributes, attributes)
     const mergedAttribution = mergeAttrs(this.usedAttribution, attribution)
     if (((this.lastOp instanceof InsertStringOp && insert.constructor === String) || (this.lastOp instanceof InsertArrayOp && insert.constructor === Array)) && (mergedAttributes === this.lastOp.attributes || fun.equalityDeep(mergedAttributes, this.lastOp.attributes)) && (mergedAttribution === this.lastOp.attribution || fun.equalityDeep(mergedAttribution, this.lastOp.attribution))) {
+      // @ts-ignore
       if (insert.constructor === String) {
         // @ts-ignore
         this.lastOp.insert += insert
@@ -441,12 +442,14 @@ export class TextDelta extends DeltaBuilder {
 }
 
 /**
- * @return {TextDelta<TextDeltaContent>}
+ * @template {object} Embeds
+ * @return {TextDelta<Embeds>}
  */
 export const createTextDelta = () => new TextDelta()
 
 /**
- * @return {ArrayDelta<any>}
+ * @template [V=any]
+ * @return {ArrayDelta<V>}
  */
 export const createArrayDelta = () => new ArrayDelta()
 
diff --git a/src/utils/YEvent.js b/src/utils/YEvent.js
index 725ffb20..40000441 100644
--- a/src/utils/YEvent.js
+++ b/src/utils/YEvent.js
@@ -7,7 +7,8 @@ import * as array from 'lib0/array'
 import * as error from 'lib0/error'
 
 /**
- * @typedef {import('../utils/Delta.js').TextDelta} TextDelta
+ * @template {object} Embed
+ * @typedef {import('../utils/Delta.js').TextDelta<Embed>} TextDelta
  */
 
 /**
@@ -50,7 +51,7 @@ export class YEvent {
      */
     this._keys = null
     /**
-     * @type {TextDelta?}
+     * @type {TextDelta<any>?}
      */
     this._delta = null
     /**
diff --git a/tests/y-array.tests.js b/tests/y-array.tests.js
index faad66c4..4eaab5d2 100644
--- a/tests/y-array.tests.js
+++ b/tests/y-array.tests.js
@@ -530,7 +530,7 @@ export const testAttributedContent = _tc => {
     })
     const expectedContent = delta.createArrayDelta().insert([1], null, { delete: [] }).insert([2]).insert([42], null, { insert: [] })
     const attributedContent = yarray.getContent(attributionManager)
-    console.log(attributedContent.toJSON().ops)
+    console.log(attributedContent.toJSON())
     t.assert(attributedContent.equals(expectedContent))
   })
 }
diff --git a/tests/y-text.tests.js b/tests/y-text.tests.js
index acd4f286..b0607279 100644
--- a/tests/y-text.tests.js
+++ b/tests/y-text.tests.js
@@ -1804,7 +1804,7 @@ export const testTypesAsEmbed = tc => {
   text0.applyDelta([{
     insert: new Y.Map([['key', 'val']])
   }])
-  t.compare(/** @type {delta.InsertOp<any>} */ (text0.getContent().ops[0]).insert.toJSON(), { key: 'val' })
+  t.compare(/** @type {delta.InsertEmbedOp<any>} */ (text0.getContent().ops[0]).insert.toJSON(), { key: 'val' })
   let firedEvent = false
   text1.observe(event => {
     const d = event.delta
@@ -1944,7 +1944,7 @@ export const testFormattingDeltaUnnecessaryAttributeChange = tc => {
   })
   testConnector.flushAllMessages()
   /**
-   * @type {Array<delta.TextDelta>}
+   * @type {Array<delta.TextDelta<any>>}
    */
   const deltas = []
   text0.observe(event => {
@@ -2262,14 +2262,14 @@ export const testAttributedContent = _tc => {
     ytext.applyDelta([{ retain: 4, attributes: { italic: true } }, { retain: 2 }, { delete: 5 }, { insert: 'attributions' }])
     const expectedContent = delta.createTextDelta().insert('Hell', { italic: true }, { attributes: { italic: [] } }).insert('o ').insert('World', {}, { delete: [] }).insert('attributions', {}, { insert: [] }).insert('!')
     const attributedContent = ytext.getContent(attributionManager)
-    console.log(attributedContent.toJSON().ops)
+    console.log(attributedContent.toJSON())
     t.assert(attributedContent.equals(expectedContent))
   })
   t.group('unformat', () => {
     ytext.applyDelta([{ retain: 5, attributes: { italic: null } }])
     const expectedContent = delta.createTextDelta().insert('Hell', null, { attributes: { italic: [] } }).insert('o attributions!')
     const attributedContent = ytext.getContent(attributionManager)
-    console.log(attributedContent.toJSON().ops)
+    console.log(attributedContent.toJSON())
     t.assert(attributedContent.equals(expectedContent))
   })
 }
@@ -2300,7 +2300,7 @@ export const testAttributedDiffing = _tc => {
   const attributionManager = new TwosetAttributionManager(attributedInsertions, attributedDeletions)
   // we render the attributed content with the attributionManager
   const attributedContent = ytext.getContent(attributionManager)
-  console.log(JSON.stringify(attributedContent.toJSON().ops, null, 2))
+  console.log(JSON.stringify(attributedContent.toJSON(), null, 2))
   const expectedContent = delta.createTextDelta().insert('Hell', { italic: true }, { attributes: { italic: ['Bob'] } }).insert('o ').insert('World', {}, { delete: ['Bob'] }).insert('attributions', {}, { insert: ['Bob'] }).insert('!')
   t.assert(attributedContent.equals(expectedContent))
   console.log(Y.encodeIdMap(attributedInsertions).length)
diff --git a/tests/y-xml.tests.js b/tests/y-xml.tests.js
index 251a0c38..a0c0611c 100644
--- a/tests/y-xml.tests.js
+++ b/tests/y-xml.tests.js
@@ -245,7 +245,7 @@ export const testFragmentAttributedContent = _tc => {
     })
     const expectedContent = delta.createArrayDelta().insert([elem1], null, { delete: [] }).insert([elem2]).insert([elem3], null, { insert: [] })
     const attributedContent = yfragment.getContent(attributionManager)
-    console.log(attributedContent.children.toJSON().ops)
+    console.log(attributedContent.children.toJSON())
     t.assert(attributedContent.children.equals(expectedContent))
     t.compare(elem1.getContent(attributionManager).toJSON(), delta.createTextDelta().insert('hello', null, { delete: [] }).done().toJSON())
   })
@@ -274,7 +274,7 @@ export const testElementAttributedContent = _tc => {
     })
     const expectedContent = delta.createArrayDelta().insert([elem1], null, { delete: [] }).insert([elem2]).insert([elem3], null, { insert: [] })
     const attributedContent = yelement.getContent(attributionManager)
-    console.log('children', attributedContent.children.toJSON().ops)
+    console.log('children', attributedContent.children.toJSON())
     console.log('attributes', attributedContent.attributes)
     t.assert(attributedContent.children.equals(expectedContent))
     t.compare(attributedContent.attributes, { key: { prevValue: undefined, value: '42', attribution: { insert: [] } } })
@@ -288,8 +288,8 @@ export const testElementAttributedContent = _tc => {
           delta.createTextDelta().insert('world', null, { insert: [] })
         ], null, { insert: [] })
       const attributedContent = yelement.getContentDeep(attributionManager)
-      console.log('children', JSON.stringify(attributedContent.children.toJSON().ops, null, 2))
-      console.log('cs expec', JSON.stringify(expectedContent.toJSON().ops, null, 2))
+      console.log('children', JSON.stringify(attributedContent.children.toJSON(), null, 2))
+      console.log('cs expec', JSON.stringify(expectedContent.toJSON(), null, 2))
       console.log('attributes', attributedContent.attributes)
       t.assert(attributedContent.children.equals(expectedContent))
       t.compare(attributedContent.attributes, { key: { prevValue: undefined, value: '42', attribution: { insert: [] } } })
@@ -317,7 +317,7 @@ export const testElementAttributedContentViaDiffer = _tc => {
   const attributionManager = Y.createAttributionManagerFromDiff(ydocV1, ydoc)
   const expectedContent = delta.createArrayDelta().insert([delta.createTextDelta().insert('hello', null, { delete: [] })], null, { delete: [] }).insert([elem2.getContentDeep()]).insert([delta.createTextDelta().insert('world', null, { insert: [] })], null, { insert: [] })
   const attributedContent = yelement.getContentDeep(attributionManager)
-  console.log('children', attributedContent.children.toJSON().ops)
+  console.log('children', attributedContent.children.toJSON())
   console.log('attributes', attributedContent.attributes)
   t.assert(attributedContent.children.equals(expectedContent))
   t.compare(attributedContent.attributes, { key: { prevValue: undefined, value: '42', attribution: { insert: [] } } })
@@ -331,8 +331,8 @@ export const testElementAttributedContentViaDiffer = _tc => {
         delta.createTextDelta().insert('world', null, { insert: [] })
       ], null, { insert: [] })
     const attributedContent = yelement.getContentDeep(attributionManager)
-    console.log('children', JSON.stringify(attributedContent.children.toJSON().ops, null, 2))
-    console.log('cs expec', JSON.stringify(expectedContent.toJSON().ops, null, 2))
+    console.log('children', JSON.stringify(attributedContent.children.toJSON(), null, 2))
+    console.log('cs expec', JSON.stringify(expectedContent.toJSON(), null, 2))
     console.log('attributes', attributedContent.attributes)
     t.assert(attributedContent.children.equals(expectedContent))
     t.compare(attributedContent.attributes, { key: { prevValue: undefined, value: '42', attribution: { insert: [] } } })
@@ -352,8 +352,8 @@ export const testElementAttributedContentViaDiffer = _tc => {
         delta.createTextDelta().insert('bigworld', null, { insert: [] })
       ], null, { insert: [] })
     const attributedContent = yelement.getContentDeep(attributionManager)
-    console.log('children', JSON.stringify(attributedContent.children.toJSON().ops, null, 2))
-    console.log('cs expec', JSON.stringify(expectedContent.toJSON().ops, null, 2))
+    console.log('children', JSON.stringify(attributedContent.children.toJSON(), null, 2))
+    console.log('cs expec', JSON.stringify(expectedContent.toJSON(), null, 2))
     console.log('attributes', attributedContent.attributes)
     t.assert(attributedContent.children.equals(expectedContent))
     t.compare(attributedContent.attributes, { key: { prevValue: undefined, value: '42', attribution: { insert: [] } } })