Question

我是Angular的新手，我试图在我的应用程序中使用localStorage API。每当我运行应用程序时，它会在控制台中抛出错误TypeError: localStorage.getItems is not a function。然后我在npm的帮助下下载了angular-local-storage。我还在LocalStorageModule中导入了app.module.ts并将其添加到导入数组中。但是，现在它会抛出此错误：

angular-localstorage.js:24 Uncaught TypeError: Cannot read property 'module' of undefined
at TEST (angular-localstorage.js:24)
at eval (angular-localstorage.js:198)
at Object.../../../../angular-localstorage/angular-localstorage.js (vendor.bundle.js:206)
at __webpack_require__ (inline.bundle.js:55)
at eval (index.js:1)
at Object.../../../../angular-localstorage/index.js (vendor.bundle.js:213)
at __webpack_require__ (inline.bundle.js:55)
at eval (app.module.ts:7)
at Object.../../../../../src/app/app.module.ts (main.bundle.js:36)
at __webpack_require__ (inline.bundle.js:55)<br/>

代码包含getItem函数：

    export class Init{
    load(){
        if(localStorage.getItem('markers')===null || localStorage.getItem('markers')===undefined)
        {
            console.log('No markers found...creating...');

            var markers=[

  {
    name:'Company One',
    lat:42.825588,
    lng:-71.018029,
    draggable:true
  },
 {
    name:'Company Two',
    lat:42.868170,
    lng:-70.889071,
    draggable:false
  },
  {
    name:'Company Three',
    lat:42.858279,
    lng:-71.930498,
    draggable:true
  }
  ];
        localStorage.setItem('markers',JSON.stringify(markers));


        }
        else
        {
            console.log('Loading markers...')
        }
    }
}

app.module.ts中的代码：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule, ApplicationRef } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import {MarkerService} from './services/marker.service';
import {LocalStorageModule} from 'angular-localstorage';
import { AgmCoreModule } from '@agm/core';

@NgModule({
  imports: [
    BrowserModule,
    CommonModule,
    FormsModule,
    LocalStorageModule,
    AgmCoreModule.forRoot({
      apiKey:''
    })
  ],
  providers: [MarkerService],
  declarations: [ AppComponent ],
  bootstrap: [ AppComponent ]
})
export class AppModule {}

任何人都可以帮我解决这个问题在此先感谢。

Answer 1

localstorage API内置于Angular框架中，您不需要外部库。您可以localStorage.<yourMethodName>直接将其用于代码

此外，还没有任何名为getItems的方法。

可用方法列表是......

getItem removeItem setItem clear

More Info Here

Answer 2

标准的localStorage API应该可以正常工作，不需要为此安装模块，使用通常的方法来获取和设置localStorage中的项目：

localStorage.setItem('name', 'ABC');
localStorage.getItem('name');

TypeError：无法读取属性＆＃39; module＆＃39;未定义的

2 个答案: