diff --git a/src/ol/style/Fill.js b/src/ol/style/Fill.js
index bbf93d02ab..707e3013ff 100644
--- a/src/ol/style/Fill.js
+++ b/src/ol/style/Fill.js
@@ -5,7 +5,7 @@
 
 /**
  * @typedef {Object} Options
- * @property {import("../color.js").Color|import("../colorlike.js").ColorLike} [color] A color, gradient or pattern.
+ * @property {import("../color.js").Color|import("../colorlike.js").ColorLike} [color=null] A color, gradient or pattern.
  * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.
  * Default null; if null, the Canvas/renderer default black will be used.
  */
diff --git a/src/ol/style/Icon.js b/src/ol/style/Icon.js
index 21d5a56c2c..683f906446 100644
--- a/src/ol/style/Icon.js
+++ b/src/ol/style/Icon.js
@@ -16,14 +16,14 @@ import ImageStyle from './Image.js';
 /**
  * @typedef {Object} Options
  * @property {Array<number>} [anchor=[0.5, 0.5]] Anchor. Default value is the icon center.
- * @property {import("./IconOrigin.js").default} [anchorOrigin] Origin of the anchor: `bottom-left`, `bottom-right`,
- * `top-left` or `top-right`. Default is `top-left`.
- * @property {import("./IconAnchorUnits.js").default} [anchorXUnits] Units in which the anchor x value is
+ * @property {import("./IconOrigin.js").default} [anchorOrigin='top-left'] Origin of the anchor: `bottom-left`, `bottom-right`,
+ * `top-left` or `top-right`.
+ * @property {import("./IconAnchorUnits.js").default} [anchorXUnits='fraction'] Units in which the anchor x value is
  * specified. A value of `'fraction'` indicates the x value is a fraction of the icon. A value of `'pixels'` indicates
- * the x value in pixels. Default is `'fraction'`.
- * @property {import("./IconAnchorUnits.js").default} [anchorYUnits] Units in which the anchor y value is
+ * the x value in pixels.
+ * @property {import("./IconAnchorUnits.js").default} [anchorYUnits='fraction'] Units in which the anchor y value is
  * specified. A value of `'fraction'` indicates the y value is a fraction of the icon. A value of `'pixels'` indicates
- * the y value in pixels. Default is `'fraction'`.
+ * the y value in pixels.
  * @property {import("../color.js").Color|string} [color] Color to tint the icon. If not specified,
  * the icon will be left as is.
  * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that you must provide a
@@ -34,8 +34,8 @@ import ImageStyle from './Image.js';
  * to provide the size of the image, with the `imgSize` option.
  * @property {Array<number>} [offset=[0, 0]] Offset, which, together with the size and the offset origin, define the
  * sub-rectangle to use from the original icon image.
- * @property {import("./IconOrigin.js").default} [offsetOrigin] Origin of the offset: `bottom-left`, `bottom-right`,
- * `top-left` or `top-right`. Default is `top-left`.
+ * @property {import("./IconOrigin.js").default} [offsetOrigin='top-left'] Origin of the offset: `bottom-left`, `bottom-right`,
+ * `top-left` or `top-right`.
  * @property {number} [opacity=1] Opacity of the icon.
  * @property {number} [scale=1] Scale.
  * @property {boolean} [rotateWithView=false] Whether to rotate the icon with the view.
diff --git a/src/ol/style/Text.js b/src/ol/style/Text.js
index 091df3e7ba..b9f6b4f5f6 100644
--- a/src/ol/style/Text.js
+++ b/src/ol/style/Text.js
@@ -18,13 +18,13 @@ const DEFAULT_FILL_COLOR = '#333';
  * @typedef {Object} Options
  * @property {string} [font] Font style as CSS 'font' value, see:
  * https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/font. Default is '10px sans-serif'
- * @property {number} [maxAngle] When `placement` is set to `'line'`, allow a maximum angle between adjacent characters.
+ * @property {number} [maxAngle=Math.PI/4] When `placement` is set to `'line'`, allow a maximum angle between adjacent characters.
  * The expected value is in radians, and the default is 45° (`Math.PI / 4`).
  * @property {number} [offsetX=0] Horizontal text offset in pixels. A positive will shift the text right.
  * @property {number} [offsetY=0] Vertical text offset in pixels. A positive will shift the text down.
  * @property {boolean} [overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed
  * the width of the polygon at the label position or the length of the path that it follows.
- * @property {import("./TextPlacement.js").default|string} [placement] Text placement.
+ * @property {import("./TextPlacement.js").default|string} [placement='point'] Text placement.
  * @property {number} [scale] Scale.
  * @property {boolean} [rotateWithView=false] Whether to rotate the text with the view.
  * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).