Merge pull request #492 from scala-js/issue/489

Fix #489 Add CSS.supports

Author: japgolly

api-reports/2_12.txt

@@ -217,6 +217,7 @@ css[SO] type RuleList = raw.CSSRuleList
 css[SO] type StyleDeclaration = raw.CSSStyleDeclaration
 css[SO] type StyleRule = raw.CSSStyleRule
 css[SO] type StyleSheet = raw.CSSStyleSheet
+css[SO] def CSS = raw.CSS
 css[SO] def Rule = raw.CSSRule
 experimental/AbortController[JC] def abort(): Unit
 experimental/AbortController[JC] val signal: AbortSignal
@@ -2592,6 +2593,8 @@ raw/CDATASection[JC] def splitText(offset: Int): Text
 raw/CDATASection[JC] def substringData(offset: Int, count: Int): String
 raw/CDATASection[JC] var textContent: String
 raw/CDATASection[JC] def wholeText: String
+raw/CSS[JO] def supports(propertyName: String, value: String): Boolean
+raw/CSS[JO] def supports(supportCondition: String): Boolean
 raw/CSSFontFaceRule[JC] var CHARSET_RULE: Int
 raw/CSSFontFaceRule[JC] var FONT_FACE_RULE: Int
 raw/CSSFontFaceRule[JC] var IMPORT_RULE: Int

api-reports/2_13.txt

@@ -217,6 +217,7 @@ css[SO] type RuleList = raw.CSSRuleList
 css[SO] type StyleDeclaration = raw.CSSStyleDeclaration
 css[SO] type StyleRule = raw.CSSStyleRule
 css[SO] type StyleSheet = raw.CSSStyleSheet
+css[SO] def CSS = raw.CSS
 css[SO] def Rule = raw.CSSRule
 experimental/AbortController[JC] def abort(): Unit
 experimental/AbortController[JC] val signal: AbortSignal
@@ -2592,6 +2593,8 @@ raw/CDATASection[JC] def splitText(offset: Int): Text
 raw/CDATASection[JC] def substringData(offset: Int, count: Int): String
 raw/CDATASection[JC] var textContent: String
 raw/CDATASection[JC] def wholeText: String
+raw/CSS[JO] def supports(propertyName: String, value: String): Boolean
+raw/CSS[JO] def supports(supportCondition: String): Boolean
 raw/CSSFontFaceRule[JC] var CHARSET_RULE: Int
 raw/CSSFontFaceRule[JC] var FONT_FACE_RULE: Int
 raw/CSSFontFaceRule[JC] var IMPORT_RULE: Int

src/main/scala/org/scalajs/dom/css.scala

@@ -4,6 +4,7 @@ package org.scalajs.dom
  * Short aliases of all the dom.CSSThing classes
  */
 object css {
+  @inline def CSS = raw.CSS
   type FontFaceRule = raw.CSSFontFaceRule
   type ImportRule = raw.CSSImportRule
   type KeyframeRule = raw.CSSKeyframeRule

src/main/scala/org/scalajs/dom/raw/Css.scala

@@ -12,6 +12,28 @@ package org.scalajs.dom.raw
 import scala.scalajs.js
 import scala.scalajs.js.annotation._
 
+@js.native
+@JSGlobal
+object CSS extends js.Object {
+
+  /**
+   * The CSS.supports() method returns a boolean value indicating if the browser supports a given CSS feature, or not.
+   * Allows to test the support of a pair property-value.
+   *
+   * MDN
+   */
+  def supports(propertyName: String, value: String): Boolean = js.native
+
+  /**
+   * The CSS.supports() method returns a boolean value indicating if the browser supports a given CSS feature, or not.
+   * Takes one parameter matching the condition of @supports.
+   *
+   * MDN
+   */
+  def supports(supportCondition: String): Boolean = js.native
+
+}
+
 /**
  * A CSSStyleDeclaration is an interface to the declaration block returned by the
  * style property of a cssRule in a stylesheet, when the rule is a CSSStyleRule.