在Angular v13中,提供了一个新的动态JIT编译器(Just-in-Time)模块加载器,来替代之前的Angular编译器API。新的模块加载器允许在运行时动态地加载和编译组件,并可以与原生ES2015模块兼容。下面是一些示例代码,演示了如何使用新的模块加载器。
首先,在应用程序的根模块中需要导入新的JIT编译器模块加载器:
import { Compiler, COMPILER_OPTIONS, CompilerOptions, NgModule, NgModuleRef, Injector } from '@angular/core';
import { JitCompilerFactory } from '@angular/compiler';
export function createCompiler(compilerFactory: JitCompilerFactory): Compiler {
return compilerFactory.createCompiler();
}
const jitCompilerFactory = new JitCompilerFactory();
@NgModule({
providers: [
{ provide: COMPILER_OPTIONS, useValue: {}, multi: true },
{ provide: CompilerFactory, deps: [COMPILER_OPTIONS], useFactory: createCompiler },
{ provide: JitCompilerFactory, useValue: jitCompilerFactory }
],
exports: [ApplicationModule]
})
export class AppModule { }
然后可以使用编译器服务来动态地编译和加载组件:
import { Component, ViewChild, ElementRef, Injector, NgModuleFactoryLoader } from '@angular/core';
@Component({
selector: 'app-dynamic-component',
template: ''
})
export class DynamicComponent {
@ViewChild('container', { read: ElementRef }) container: ElementRef;
constructor(private compiler: Compiler, private injector: Injector, private loader: NgModuleFactoryLoader) { }
async ngAfterViewInit() {
// Load and compile module
const moduleFactory = await this.loader.load('path/to/module#MyModule');
const moduleRef = moduleFactory.create(this.injector);
// Load and compile component
const componentType = moduleFactory.moduleType['MyComponent'];
const componentFactory = this.compiler.compileComponentSync(component