在 Angular 5 和 AOT-Build 中使用 @angular 编译器时出错 [英] Error while using @angular compiler in Angular 5 and AOT-Build

问题描述

我正在使用 Angular Compiler 在运行时编译组件.此代码工作正常，但如果我想使用 AOT-Prerendering，组件将无法工作，因为 Angular 不会在 AOT-Build 中加载编译器.

我已经阅读了一些不再适用于 Angular5+ 的解决方法.您对这个问题有什么解决方案吗?

最好的问候

<前>导出类 RuntimeCompilerComponent {模板:字符串="；@ViewChild('dynamicComponent', { read: ViewContainerRef }) 容器:ViewContainerRef;构造函数(私有编译器:编译器){}//Ruft die addComponent Methode auf创建组件(){this.addComponent(this.template, null);}//Komponente wird dynamisch erzeugt und geladen//Sollten sich die properties ändern muss ggf.die Changedetection manuell aufgerufen werden.私人添加组件(模板:字符串，属性:任何= {}){@Component({模板})类模板组件 { }@NgModule({进口:[应用模块，通用模块，反应形式模块，表单模块，浏览器模块，]、声明:[TemplateComponent]})类模板模块 { }const mod = this.compiler.compileModuleAndAllComponentsSync(TemplateModule);const factory = mod.componentFactories.find((comp) =>comp.componentType === TemplateComponent);const 组件 = this.container.createComponent(factory);Object.assign(component.instance, properties);}}

解决方案

您可以通过一些技巧来完成这项工作.去年我遇到了同样的问题，并且能够找到解决方法.我在我的样式指南中使用了动态生成的角度组件.这是一个工作示例，它适用于 Angular 7 中的 AOT 编译:

https://github.com/johncrim/angular-dynamic-styleguide

该项目的 README.md 提供了一些关于我遇到的问题以及我如何找到修复的附加信息.

i am using the Angular Compiler to compile components in runtime. This Code works fine, but if I want to use AOT-Prerendering the Component wont work, because Angular does not load the Compiler in AOT-Build.

I've read about some Workarounds that wont Work in Angular5+ anymore. Do you have any solutions for this problem?

Best Regards

    export class RuntimeCompilerComponent {
      template: string = "";
      @ViewChild('dynamicComponent', { read: ViewContainerRef }) container: ViewContainerRef;
      constructor(private compiler: Compiler) { }

      //Ruft die addComponent Methode auf
      createComponent() {
        this.addComponent(this.template, null);
      }

      // Komponente wird dynamisch erzeugt und geladen
      // Sollten sich die properties ändern muss ggf. die Changedetection manuell aufgerufen werden.
      private addComponent(template: string, properties: any = {}) {
        @Component({ template })
        class TemplateComponent { }
        @NgModule({
          imports: [
            AppModule,
            CommonModule,
            ReactiveFormsModule,
            FormsModule,
            BrowserModule,
          ], declarations: [TemplateComponent]
        })
        class TemplateModule { }
        const mod = this.compiler.compileModuleAndAllComponentsSync(TemplateModule);
        const factory = mod.componentFactories.find((comp) =>
          comp.componentType === TemplateComponent
        );
        const component = this.container.createComponent(factory);
        Object.assign(component.instance, properties);
      }
    }

解决方案

You can make this work with a few tricks. I ran into the same problem last year, and was able to find a fix. I was using dynamically generated angular components in my style-guide. Here's a working example, which works with AOT compilation in Angular 7:

https://github.com/johncrim/angular-dynamic-styleguide

The README.md for that project provides some additional info on the problems I came up against and how I figured out the fixes.

这篇关于在 Angular 5 和 AOT-Build 中使用 @angular 编译器时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！