components/resources/library/src/jsMain/kotlin/org/jetbrains/compose/resources/ResourceEnvironment.js.kt [1:26]:
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package org.jetbrains.compose.resources

import kotlinx.browser.window

private external class Intl {
    class Locale(locale: String) {
        val language: String

        // Intl.Locale.region can be undefined.
        // For example, new Int.Locale('en') instead of new Int.Locale('en-NL').
        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/region
        val region: String?
    }
}

internal actual fun getSystemEnvironment(): ResourceEnvironment {
    val locale = Intl.Locale(window.navigator.language)
    val isDarkTheme = window.matchMedia("(prefers-color-scheme: dark)").matches
    //96 - standard browser DPI https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio
    val dpi: Int = (window.devicePixelRatio * 96).toInt()
    return ResourceEnvironment(
        language = LanguageQualifier(locale.language),
        region = RegionQualifier(locale.region ?: ""),
        theme = ThemeQualifier.selectByValue(isDarkTheme),
        density = DensityQualifier.selectByValue(dpi)
    )
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components/resources/library/src/wasmJsMain/kotlin/org/jetbrains/compose/resources/ResourceEnvironment.wasmJs.kt [1:26]:
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package org.jetbrains.compose.resources

import kotlinx.browser.window

private external class Intl {
    class Locale(locale: String) {
        val language: String

        // Intl.Locale.region can be undefined.
        // For example, new Int.Locale('en') instead of new Int.Locale('en-NL').
        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/region
        val region: String?
    }
}

internal actual fun getSystemEnvironment(): ResourceEnvironment {
    val locale = Intl.Locale(window.navigator.language)
    val isDarkTheme = window.matchMedia("(prefers-color-scheme: dark)").matches
    //96 - standard browser DPI https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio
    val dpi: Int = (window.devicePixelRatio * 96).toInt()
    return ResourceEnvironment(
        language = LanguageQualifier(locale.language),
        region = RegionQualifier(locale.region ?: ""),
        theme = ThemeQualifier.selectByValue(isDarkTheme),
        density = DensityQualifier.selectByValue(dpi)
    )
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