1

我正在尝试在空白页面上呈现 React.Suspense，但失败并出现以下错误：

Uncaught Invariant Violation: Element type is invalid: expected a
string (for built-in components) or a class/function (for composite
components) but got: object.

这是代码。它编译。这是否意味着 scalajs-react 或 scalajs 不是 100% 类型安全的？我应该怎么做才能解决问题？

package org.myorg

import japgolly.scalajs.react.{AsyncCallback, React, ScalaComponent}
import japgolly.scalajs.react.vdom.html_<^._
import org.scalajs.dom

object MyPage {

  private val suspense = React.Suspense(
    fallback = <.div("Loading..."),
    asyncBody = AsyncCallback.point(<.div("Loaded!")).delayMs(1000))

  private val component = ScalaComponent.builder[VdomElement]("Home")
    .render_P(p => p)
    .build

  def main(args: Array[String]): Unit = {
    val container = dom.document.getElementById("app")

    // This line works
    component(<.div("hello")).renderIntoDOM(container)

    // Either of the following two lines fails
    component(suspense).renderIntoDOM(container)
    suspense.renderIntoDOM(container)
  }
}

这是项目文件。

build.properties：

sbt.version=1.2.7

构建.sbt：

lazy val root = project.in(file("."))
  .enablePlugins(ScalaJSPlugin)
  .enablePlugins(ScalaJSBundlerPlugin)
  .settings(
    organization := "org.myorg",
    scalaVersion := "2.12.8",
    scalaJSUseMainModuleInitializer := true,
    webpackBundlingMode := BundlingMode.LibraryOnly(),
    emitSourceMaps := false,
    npmDependencies in Compile ++= Seq(
      "react" -> "16.8.4",
      "react-dom" -> "16.8.4"
    ),
    libraryDependencies ++= Seq(
      "com.github.japgolly.scalajs-react" %%% "extra" % "1.4.0"
    ),
    jsEnv := new org.scalajs.jsenv.jsdomnodejs.JSDOMNodeJSEnv()
  )

索引.html：

<!doctype html>
<html lang="en" data-framework="scalajs-react">
<head>
    <meta charset="utf-8">
</head>
<body>
<section id="app"></section>
<script src="../target/scala-2.12/scalajs-bundler/main/root-fastopt-library.js"></script>
<script src="../target/scala-2.12/scalajs-bundler/main/root-fastopt-loader.js"></script>
<script src="../target/scala-2.12/scalajs-bundler/main/root-fastopt.js"></script>
</body>
</html>
4

1 回答 1

1

这似乎是 scalajs-react 如何声明其进口的问题。

v1.4.1 现在正在前往 Maven Central 的路上，应该会解决这个问题。

有关详细信息，请参阅https://github.com/japgolly/scalajs-react/issues/522。

于 2019-03-17T09:37:58.643 回答