Question

使用自定义指令更改段落标记的背景色不适用于6号角。

@CustomDirective

import { Directive,ElementRef,HostListener } from '@angular/core';

@Directive({
  selector: '[appSteps]'
})
export class StepsDirective {

  constructor(private elementref: ElementRef){ }

  @HostListener('mouseenter')onmouseenter()
  {
    this.elementref.nativeElement.style.backgroundColor = 'yellow';

   }

  @HostListener('mouseleave')onmouseleave()
  {
    this.elementref.nativeElement.style.backgroundColor = 'null';
  }
}

@ModuleCreated：在此处添加了我的指令，并在appmodule.ts中使用了此模块

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import {StepsDirective}  from '../steps.directive';

@NgModule({
  imports: [
    CommonModule

  ],
  declarations: [StepsDirective]
})
export class StartModule { }

@ AppComponent.html-在

标记

上托管我的自定义指令

<p appSteps>My Hero Academia</p>

@ app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { Signup_Component } from './signup/signup.component';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { StartModule } from './start/start.module'; *Module created 

@NgModule({
  declarations: [
    AppComponent,
    Signup_Component, 
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpClientModule,
    StartModule,

  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Answer 1

您应该首先导出声明了指令的模块，然后将其导入到要使用的任何地方

@NgModule({
  imports: [
    CommonModule

  ],
  exports:[StepsDirective]
  declarations: [StepsDirective]
})
export class StartModule { }

自定义指令不适用于角度6：

1 个答案: