在Angular 2项目中导入和使用带有Typescript 2的无类型传单JS插件

2019年7月20日 311次阅读

我在Angular 2应用程序中使用LeafletJS库.库本身工作正常,因为我已经包含了类型定义(leaflet.d.ts),当然还有传单节点模块.

我正在尝试导入名为“leaflet-canvasicon”的传单库的插件,并且没有可用的类型定义,因为每当我尝试包含它时,它都是用ES5编写的,编译器很满意,但我收到了以下错误：控制台：

leaflet-src.js:314
Uncaught TypeError: this.callInitHooks is not a function
    at Object.NewClass (http://localhost:2080/main.bundle.js:58716:8)
    at http://localhost:2080/main.bundle.js:77650:180
    at Object.<anonymous> (http://localhost:2080/main.bundle.js:77652:3)
    at __webpack_require__ (http://localhost:2080/inline.js:53:30)
    at Object.<anonymous> (http://localhost:2080/main.bundle.js:54476:18)
    at __webpack_require__ (http://localhost:2080/inline.js:53:30)
    at Object.<anonymous> (http://localhost:2080/main.bundle.js:54411:90)
    at __webpack_require__ (http://localhost:2080/inline.js:53:30)
    at Object.<anonymous> (http://localhost:2080/main.bundle.js:54600:70)
    at __webpack_require__ (http://localhost:2080/inline.js:53:30)

我想到了很多解决方案：

>为插件创建一个新的类型定义(leaflet-canvasicon.d.ts)并使用Typescript中的名称空间声明合并功能,以便仍然使用该插件作为L.CanvasIcon
>使用typescript扩展插件,扩展命名空间L中的现有接口.
>停止使用键入的’leaflet’,然后导入用ES5编写的节点模块,然后在angular的typings.d.ts文件中添加L声明：declare var L：any;

但每次我遇到编译器问题.我想我做错了.如何包含插件,保持编译器满意并能够将其用作L.CanvasIcon

这是package.json文件：

 "dependencies": {
        "@angular/common": "2.1.2",
        "@angular/compiler": "2.1.2",
        "@angular/compiler-cli": "2.1.2",
        "@angular/core": "2.1.2",
        "@angular/forms": "2.1.2",
        "@angular/http": "2.1.2",
        "@angular/platform-browser": "2.1.2",
        "@angular/platform-browser-dynamic": "2.1.2",
        "@angular/platform-server": "2.1.2",
        "@angular/router": "3.1.2",
        "@types/leaflet": "^1.0.36",
        "core-js": "^2.4.1",
        "leaflet": "^1.0.1",
        "leaflet-canvasicon": "^0.1.6",
        "leafletjs-canvas-overlay": "^1.0.1",
        "rxjs": "5.0.0-rc.1",
        "ts-helpers": "^1.1.2",
        "zone.js": "^0.6.26"
      },
      "devDependencies": {
        "angular-cli": "1.0.0-beta.19-3",
        "ts-node": "1.6.1",
        "tslint": "3.15.1",
        "typescript": "2.0.6",
        "typings": "^1.5.0"
      }
    }

最佳答案 这是与缺少的打字无关的运行时错误.该问题与传单版本不匹配有关.

看起来leaflet-canvasicon是为老版本的传单而设计的.尝试使用版本0.7.x回退到传单.

 "dependencies": {
        "@angular/common": "2.1.2",
        "@angular/compiler": "2.1.2",
        "@angular/compiler-cli": "2.1.2",
        "@angular/core": "2.1.2",
        "@angular/forms": "2.1.2",
        "@angular/http": "2.1.2",
        "@angular/platform-browser": "2.1.2",
        "@angular/platform-browser-dynamic": "2.1.2",
        "@angular/platform-server": "2.1.2",
        "@angular/router": "3.1.2",
        "@types/leaflet": "0.7.x",
        "core-js": "^2.4.1",
        "leaflet": "0.7.x", // note the change
        "leaflet-canvasicon": "^0.1.6",
        "leafletjs-canvas-overlay": "^1.0.1",
        "rxjs": "5.0.0-rc.1",
        "ts-helpers": "^1.1.2",
        "zone.js": "^0.6.26"
      },
      "devDependencies": {
        "angular-cli": "1.0.0-beta.19-3",
        "ts-node": "1.6.1",
        "tslint": "3.15.1",
        "typescript": "2.0.6",
        "typings": "^1.5.0"
      }
    }

对于将来,您可以记住this.callInitHooks不是函数是将旧版扩展加载到传单版本后的典型问题> = 1

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