如何解决与导航栏有关的角度错误

Question

这些是我在代码中面临的错误

  

如果“ nav-bar”是Web组件，则将“ CUSTOM_ELEMENTS_SCHEMA”添加到该组件的“ @ NgModule.schemas”以禁止显示此消息。 （“                                         [错误->]

     </div>
    "): ng:///AppModule/AppComponent.html@12:2
        at syntaxError (compiler.js:2430)
        at TemplateParser.push../node_modules/@angular/compiler/fesm5/compiler.js.TemplateParser.parse (compiler.js:20605)
        at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._parseTemplate (compiler.js:26171)
        at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler

        ._compileTemplate (compiler.js:26158)
            at compiler.js:26101
            at Set.forEach (<anonymous>)
            at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileComponents (compiler.js:26101)
            at compiler.js:26011
            at Object.then (compiler.js:2421)
            at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._compileModuleAndComponents (compiler.js:26010)