New pages: HTMLSelectElement properties (#35876)

* New pages: HTMLSelectElement properties

* missing quote

files/en-us/web/api/htmlselectelement/length/index.md

@@ -0,0 +1,39 @@
+---
+title: "HTMLSelectElement: length property"
+short-title: length
+slug: Web/API/HTMLSelectElement/length
+page-type: web-api-instance-property
+browser-compat: api.HTMLSelectElement.length
+---
+
+{{ APIRef("HTML DOM") }}
+
+The **`length`** property of the {{DOMxRef("HTMLSelectElement")}} interface specifies the number of {{htmlelement("option")}} elements in the {{htmlelement("select")}} element. It represents the number of nodes in the {{DOMxRef("HTMLSelectElement.options", "options")}} collection. On setting, it acts as ({{DOMxRef("HTMLOptionsCollection.length")}}).
+
+## Value
+
+A number.
+
+## Examples
+
+```js
+const selectElement = document.getElementById("fruits");
+console.log(selectElement.length);
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- {{HTMLElement("select")}}
+- {{HTMLElement("option")}}
+- {{DOMXref("HTMLSelectElement.options")}}
+- {{DOMXref("HTMLSelectElement.selectedOptions")}}
+- {{DOMXref("HTMLSelectElement.multiple")}}
+- {{DOMXref("HTMLSelectElement.selectedIndex")}}

files/en-us/web/api/htmlselectelement/multiple/index.md

@@ -0,0 +1,37 @@
+---
+title: "HTMLSelectElement: multiple property"
+short-title: multiple
+slug: Web/API/HTMLSelectElement/multiple
+page-type: web-api-instance-property
+browser-compat: api.HTMLSelectElement.multiple
+---
+
+{{ APIRef("HTML DOM") }}
+
+The **`multiple`** property of the {{DOMxRef("HTMLSelectElement")}} interface specifies that the user may select more than one option from the list of options. It reflects the {{htmlelement("select")}} element's [`multiple`](/en-US/docs/Web/HTML/Element/select#multiple) attribute.
+
+## Value
+
+A boolean.
+
+## Examples
+
+```js
+const selectElement = document.getElementById("comment");
+console.log(selectElement.multiple);
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- {{HTMLElement("select")}}
+- {{DOMXref("HTMLSelectElement.selectedOptions")}}
+- {{DOMXref("HTMLSelectElement.length")}}
+- {{DOMXref("HTMLSelectElement.selectedIndex")}}

files/en-us/web/api/htmlselectelement/required/index.md

@@ -0,0 +1,36 @@
+---
+title: "HTMLSelectElement: required property"
+short-title: required
+slug: Web/API/HTMLSelectElement/required
+page-type: web-api-instance-property
+browser-compat: api.HTMLSelectElement.required
+---
+
+{{ APIRef("HTML DOM") }}
+
+The **`required`** property of the {{DOMxRef("HTMLSelectElement")}} interface specifies that the user must select an option with a non-empty string value before submitting a form. It reflects the {{htmlelement("select")}} element's [`required`](/en-US/docs/Web/HTML/Element/select#required) attribute.
+
+## Value
+
+A boolean.
+
+## Examples
+
+```js
+const selectElement = document.getElementById("fruits");
+console.log(selectElement.required);
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- {{HTMLElement("select")}}
+- {{DOMXref("HTMLSelectElement.validity")}}
+- {{cssxref(":required")}} pseudo-class

files/en-us/web/api/htmlselectelement/size/index.md

@@ -0,0 +1,40 @@
+---
+title: "HTMLSelectElement: size property"
+short-title: size
+slug: Web/API/HTMLSelectElement/size
+page-type: web-api-instance-property
+browser-compat: api.HTMLSelectElement.size
+---
+
+{{ APIRef("HTML DOM") }}
+
+The **`size`** property of the {{DOMxRef("HTMLSelectElement")}} interface specifies the number of options, or rows, that should be visible at one time. It reflects the {{htmlelement("select")}} element's [`size`](/en-US/docs/Web/HTML/Element/select#size) attribute. If omitted, the value is `0`.
+
+> [!NOTE]
+> While by default a `<select>` displays a single row unless {{DOMxRef("HTMLSelectElement.multiple", "multiple")}} is true, in which case four rows are displayed, the default value for the `size` property is `0`.
+
+## Value
+
+A number.
+
+## Examples
+
+```js
+const selectElement = document.getElementById("fruits");
+console.log(selectElement.size);
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- {{HTMLElement("select")}}
+- {{HTMLElement("options")}}
+- {{DOMXref("HTMLSelectElement.selectedOptions")}}
+- {{DOMXref("HTMLSelectElement.length")}}