This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The StylePropertyMapReadOnly interface of the the CSS Typed Object Model API provides a read-only representation of a CSS declaration block that is an alternative to CSSStyleDeclaration. Retrieve an instance of this interface using Element.computedStyleMap().
Properties
StylePropertyMapReadOnly.size- Returns an unsinged long integer containing the size of the
StylePropertyMapReadOnlyobject.
Methods
StylePropertyMapReadOnly.entries()- Returns an array of a given object's own enumerable property
[key, value]pairs, in the same order as that provided by afor...inloop (the difference being that a for-in loop enumerates properties in the prototype chain as well). StylePropertyMapReadOnly.forEach()- Executes a provided function once for each element of
StylePropertyMapReadOnly. StylePropertyMapReadOnly.get()- Returns the value of the specified property.
StylePropertyMapReadOnly.getAll()- Returns an array of
CSSStyleValueobjects containing the values for the provided property. StylePropertyMapReadOnly.has()- Indicates whether the specified property is in the
StylePropertyMapReadOnlyobject. StylePropertyMapReadOnly.keys()- Returns a new Array Iterator containing the keys for each item in
StylePropertyMapReadOnly. StylePropertyMapReadOnly.values()- Returns a new Array Iterator containing the values for each index in the
StylePropertyMapReadOnlyobject.
Specifications
| Specification | Status | Comment |
|---|---|---|
| CSS Typed OM Level 1 The definition of 'StylePropertyMapReadOnly' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
@@iterator | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
entries | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
forEach | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
get | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
getAll | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
has | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
keys | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
size | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
values | Chrome Full support 66 | Edge No support No | Firefox No support No | IE No support No | Opera Full support 53 | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Edge Mobile No support No | Firefox Android No support No | Opera Android Full support 53 | Safari iOS No support No | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.