content

这是一个在使用 TypeScript 开发时用于导入 Content 类的便捷模块。举个例子，您不需要像下面这样逐个导入内容元素：

import TextContent from "geoscene/popup/content/TextContent";
import MediaContent from "geoscene/popup/content/MediaContent";
import FieldsContent from "geoscene/popup/content/FieldsContent";
import AttachmentsContent from "geoscene/popup/content/AttachmentsContent";
import CustomContent from "geoscene/popup/content/CustomContent";
import ExpressionContent from "geoscene/popup/content/ExpressionContent";
import RelationshipContent from "geoscene/popup/content/RelationshipContent";

您可以使用此模块在一行中导入它们：

import { TextContent, MediaContent, FieldsContent, AttachmentsContent, CustomContent, ExpressionContent, RelationshipContent } from "geoscene/popup/content";

此模块还允许您在内容元素上实现类型保护，从而使代码更加智能。

import { Content } from "geoscene/popup/content";

function logContentElement(content: Content): void {
  if (content.type === "media") {
    console.log("Content type is media");
  }
  else {
    // The compiler knows the content element must be `text | fields | media | attachment | custom`
    console.log("The value is not a valid popup content element.")
  }
}