动态加载组件中的角度模板字符串

我想像这样动态加载角度模板:

import { getHTMLTemplate } from './util';

@Component({
    selector: 'app-button',
    // templateUrl: './button.component.html',
    template: `
        <div>
            some div
        </div>
        ${getHTMLTemplate()}
    `,
    styleUrls: ['./button.component.less'],
})

getHTMLTemplate 实施:

export function getHTMLTemplate(){
    return getTemplateWithSomeComplexLogic();
};

export function getTemplateWithSomeComplexLogic() {
    return '<app-something>dynamic template</app-something>';
}

这很管用 ng serve ,但失败了 ng build .
它引发以下错误:

  Error during template compile of 'getHTMLTemplate'
  Function calls are not supported in decorators but 'getTemplateWithSomeComplexLogic' was called.