New page: MathMLnonce

files/en-us/web/api/mathmlelement/index.md

@@ -21,6 +21,8 @@ _Also inherits properties from its parent, {{DOMxRef("Element")}}_.
   - : Whether the control should be focused when the page loads, or when a {{htmlelement("dialog")}} or [popover](/en-US/docs/Web/HTML/Reference/Global_attributes/popover) become shown.
 - {{DOMxRef("MathMLElement.dataset")}} {{ReadOnlyInline}}
   - : A {{DOMxRef("DOMStringMap")}} object which provides a list of key/value pairs of named data attributes which correspond to [custom data attributes](/en-US/docs/Web/HTML/How_to/Use_data_attributes) attached to the element. These correspond to MathML's [`data-*`](/en-US/docs/Web/MathML/Reference/Global_attributes/data-*) global attributes.
+- {{DOMxRef("MathMLElement.nonce")}}
+  - : Returns the cryptographic number used once that is used by Content Security Policy to determine whether a given fetch will be allowed to proceed.
 - {{DOMxRef("MathMLElement.style")}}
   - : A {{DOMxRef("CSSStyleDeclaration")}} representing the declarations of the element's `style` attribute.
 - {{DOMxRef("MathMLElement.tabIndex")}}

files/en-us/web/api/mathmlelement/nonce/index.md

@@ -0,0 +1,40 @@
+---
+title: "MathMLElement: nonce property"
+short-title: nonce
+slug: Web/API/MathMLElement/nonce
+page-type: web-api-instance-property
+browser-compat: api.MathMLElement.nonce
+---
+
+{{APIRef("MathML")}}
+
+The **`nonce`** property of the {{DOMxRef("MathMLElement")}} interface returns the {{Glossary("Nonce", "nonce")}} that is used by [Content Security Policy](/en-US/docs/Web/HTTP/Guides/CSP) to determine whether a given fetch will be allowed to proceed.
+
+## Value
+
+A String; the cryptographic nonce, or an empty string if no nonce is set.
+
+## Examples
+
+### Retrieving a nonce value
+
+```js
+const math = document.querySelector("math");
+console.log(math.nonce);
+```
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- {{domxref("HTMLElement.nonce")}} a similar property for HTML elements.
+- {{domxref("SVGElement.nonce")}} a similar property for SVG elements.
+- [`nonce` global attribute](/en-US/docs/Web/HTML/Reference/Global_attributes/nonce)
+- [Content Security Policy](/en-US/docs/Web/HTTP/Guides/CSP)
+- CSP: {{CSP("script-src")}}