在 Kotlin-js 中为 HTML 元素设置样式

Styling HTML elements at Kotlin-js

如何在使用 Kotlinx-html 时设置我的 HTML 元素的样式,我的应用程序运行良好,然后我尝试使用 AZA-Kotlin 添加样式,但是一旦我导入 azadev.kotlin 它给了我错误构建 我的完整代码如下:

Main.kt:

import azadev.kotlin.css.Stylesheet
import azadev.kotlin.css.color
import azadev.kotlin.css.dimens.px
import azadev.kotlin.css.opacity
import azadev.kotlin.css.width

import kotlinx.html.*
import kotlinx.html.js.*
import kotlinx.html.dom.create
import kotlin.browser.*
import kotlinx.html.dom.append
import org.w3c.dom.HTMLButtonElement

fun main(args: Array<String>) {
    println("Hello JavaScript!")

    val myDiv = document.create.div("panel") {   // class = "panel"
        p { 
            +"Here is "
            a("http://kotlinlang.org") { +"official Kotlin site" } 
        }
    }

     val button = BUTTON()
     button!!.innerText = "Click me"
     button!!.onclick = { println("Button clicked!") }

    val btn = document.create.button {
       text("click me")
       onClickFunction = { _ -> window.alert("Kotlin!")   }
       Stylesheet {
           color = 0xffffff
           width = 10.px
           opacity = .8
           hover {
               color = 0xf2cacf
           }
      }
    }


    document.getElementById("container")!!.appendChild(myDiv)
    document.getElementById("container")!!.appendChild(btn)
    document.getElementById("container")!!.appendChild(button)

    document.getElementById("container")!!.append {
        div {
            +"added it"
        }
    }
}

fun BUTTON(): HTMLButtonElement {return document.create.button()}

我的gradle.build是:

group 'org.example'
version '1.0-SNAPSHOT'

buildscript {
    ext.kotlin_version = '1.1.51'
    ext.kotlinx_html_version = '0.6.4'
    ext.aza_kotlin_css = '1.0'
    ext.web_dir = 'web'
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

apply plugin: 'kotlin2js'

repositories {
    mavenCentral()
    jcenter()
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlin_version"
    compile "org.jetbrains.kotlinx:kotlinx-html-js:$kotlinx_html_version"
    compile "azadev.kotlin:aza-kotlin-css:$aza_kotlin_css"
}

compileKotlin2Js {
    kotlinOptions.outputFile = "${projectDir}/web/scripts/main.js"
    kotlinOptions.moduleKind = "umd"
    kotlinOptions.sourceMap = true
}

clean.doFirst() {
    delete("${web_dir}")
}

build.doLast() {
    // Copy kotlin.js and kotlin-meta.js from jar into web directory
    configurations.compile.each { File file ->
        copy {
            includeEmptyDirs = false

            from zipTree(file.absolutePath)
            into "${projectDir}/${web_dir}/lib"
            include { fileTreeElement ->
                def path = fileTreeElement.path
                path.endsWith(".js") && (path.startsWith("META-INF/resources/") || !path.startsWith("META-INF/"))
            }
        }
    }

    // Copy scripts to web directory
    copy {
        includeEmptyDirs = false
        from new File("build/classes/main")
        into "${web_dir}/lib"
    }

        // Copy resources to web directory
    copy {
        includeEmptyDirs = false
        from new File("src/main/kotlin/resources")
        into "${web_dir}"
    }
}

我的index.html是:

<html>
    <head>
        <meta charset="UTF-8">
        <title>Sample Default</title>

    </head>
    <body id="BODY">
    <h1>Kotlin 1.1 Example</h1>
    <div id="container"/>
    <input type="text" name="email" id="email"/>
    <script type="text/javascript" src="lib/kotlin.js"></script>
    <script type="text/javascript" src="lib/kotlinx-html-js.js"></script>
    <script type="text/javascript" src="scripts/main.js"></script>
   </body>
</html>

我的应用结构:

无论使用 Aza-kotlin 还是任何其他方式,我如何设置我的元素的样式。

我在 kotlinx-html 中找到了解决方案,方法是将 style 用作:

val btn = document.create.button {
   text("click me")
   onClickFunction = { _ -> window.alert("Kotlin!")   }
    style = """
             color: 0xffffff;
             width: 10.px;
             opacity: .8;
             hover {
                color : 0xf2cacf
            }
            """
}

另一个已知选项是使用 css 文件,并为元素附加所需的 class(s),例如:

val btn = document.create.button(classes = "container left tree") { ... }
//or
val btn = document.create.button { 
    classes = setOf("container", "left", "tree")
    classes += "siteHeader"  // 
... }

截至今天,aza_kotlin_css 出现问题,应用程序与我一起使用如下 [Mac 新手的详细步骤 :)]

安装 Homebrew 为:/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

安装 gradle 为:brew install gradle

通过运行ning找到安装路径brew info gradle

将 gradle 手动添加到 `Android Studio/Preferences'

创建投影文件夹,并移入cd myapp

作为 gradle init --type java-library

启动了新的 java gradle 项目

删除了 src/mainsrc/test 文件夹

创建了 src/kotlinsrc/resources 文件夹

build.gradle 文件的内容替换为:

buildscript {
    ext.kotlin_version = '1.2.21'
    ext.web_dir = 'web'
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"   // for gradle build
    }
}
apply plugin: 'kotlin2js'

repositories {     jcenter()    }

dependencies {
    def kotlinx_html_version = "0.6.8"
    // for interacting with the DOM
    compile "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlin_version"
    // for DOM creation in the client sie
    compile "org.jetbrains.kotlinx:kotlinx-html-js:${kotlinx_html_version}"
    // for DOM creation in the server sie
    // compile "org.jetbrains.kotlinx:kotlinx-html-jvm:${kotlinx_html_version}"
}

sourceSets.main {
   kotlin.srcDirs += 'src/kotlin'
   resources.srcDirs += 'src/resources'
}

compileKotlin2Js.kotlinOptions {
   outputFile = "${projectDir}/web/scripts/main.js"
   moduleKind = "commonjs"  // can be other options, commonjs is the one that works with Nodejs
   sourceMap = true
}

clean.doFirst() {
    delete("${web_dir}")
}

build.doLast() {
    // Copy kotlin.js and kotlin-meta.js from jar into web directory
    configurations.compile.each { File file ->
        copy {
            includeEmptyDirs = false

            from zipTree(file.absolutePath)
            into "${projectDir}/${web_dir}/lib"
            include { fileTreeElement ->
                def path = fileTreeElement.path
                path.endsWith(".js") && (path.startsWith("META-INF/resources/")
                        || !path.startsWith("META-INF/"))
            }
        }
    }

    // Copy scripts to web directory
    copy {
        includeEmptyDirs = false
        from new File("build/classes/main")
        into "${web_dir}/lib"
    }

    // Copy resources to web directory
    copy {
        includeEmptyDirs = false
        from new File("src/resources")
        into "${web_dir}"
    }
}

创建了包含以下内容的 src/kotlin/Main.Kt 文件:

import kotlinx.html.*
import kotlinx.html.js.*
import kotlinx.html.dom.create
import kotlin.browser.*
import kotlinx.html.dom.append
import org.w3c.dom.HTMLButtonElement

fun main(args: Array<String>) {
    println("Hello JavaScript!, do you know that fib(5) = ${fib(5)}")

    val myDiv = document.create.div("panel") {   // class = "panel"
        p {
            +"Here is "
            a("http://kotlinlang.org") { +"official Kotlin site" }
        }
    }

    val email = document.getElementById("email") as HTMLInputElement
    email.value = "hadi@jetbrains.com"

    val button = BUTTON()
    button!!.innerText = "Click me"
    button!!.onclick = { println("Button clicked!") }

    val btn = document.create.button {
        text("click me")
        onClickFunction = { _ -> window.alert("Kotlin!")   }
        style = """
             color: 0xffffff;
             width: 10.px;
             opacity: .8;
             hover {
                color : 0xf2cacf
            }
            """
    }

   /*
    // OR use one of the bew to load the style from the .css file
      val btn = document.create.button(classes = "container left tree") { 
          ... }
      //or
         val btn = document.create.button { 
            classes = setOf("container", "left", "tree")
            classes += "siteHeader"  
          ... }
     */

    document.getElementById("container")!!.appendChild(myDiv)
    document.getElementById("container")!!.appendChild(btn)
    document.getElementById("container")!!.appendChild(button)

    document.getElementById("container")!!.append {
        div {
            +"added it"
        }
    }
}

fun BUTTON(): HTMLButtonElement {return document.create.button()}

创建了另一个文件src/kotlin/Fib.tk,内容如下,从Main.kt文件中调用,全部编译为single JavaScript文件:

fun fib(n: Int):Int {
    return when (n) {
        0,1 -> 1
        else -> fib(n - 1) + fib(n - 2)
    }
}

创建了包含以下内容的 src/resources/index.html 文件:

<html>
<head>
    <meta charset="UTF-8">
    <title>Sample Default</title>
    <link rel="stylesheet" href="styles/main.css">
</head>
<body id="BODY">
    <h1>Kotlin 1.1 Example</h1>
    <div id="container"/>
    <input type="text" name="email" id="email"/>
    <script type="text/javascript" src="lib/kotlin.js"></script>
    <script type="text/javascript" src="lib/kotlinx-html-js.js"></script>
    <script type="text/javascript" src="scripts/main.js"></script>
</body>
</html>

创建了包含以下内容的 src/resources/styles/main.css 文件:

#panel {background-color: powderblue;}
h1   {color: blue;}
p    {color: red;}

使用 gradle build 构建了项目并且运行完美。

应用结构如下:

我的应用 运行 是:

关于在服务器端工作,我有一个关于创建 jar 文件的问题 and and here,希望您觉得它有用并且对此表示赞赏。