我在Laravel-5.1中有一个项目,我已经将我的平台从win10改为Ubuntu.

显示错误:

使用包信息加载composer存储库

更新依赖项(包括require-dev)

您的要求无法解析为可安装的软件包集.

  Problem 1
- laravel/framework v5.2.9 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- laravel/framework v5.2.8 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- laravel/framework v5.2.7 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- laravel/framework v5.2.6 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- laravel/framework v5.2.5 requires ext-mbstring …

如何在新窗口中打开按钮,模拟"a href,target = _blank"？

我目前有:

<button class="button" onClick="window.location.href='http://www.example.com';"> 
     <span class="icon">Open</span>
</button>

按钮不在表单中,我只想在新窗口中打开它.

我现在正在阅读angular4 doc,并注意到,有一个文件夹,环境,并且在其下有多个环境文件,例如environment.ts,environment.prod.ts,如果我们使用env = prod构建,那么prod将使用环境变量.现在我有一个问题,如何从代码中获取环境变量？我搜索了很多文档,没有提到这一点.谁能帮忙告诉我如何获取环境变量值？谢谢

是否可以在angular2中设置为无效的表单控件？(用过的表单构建器)

例如.我有form-> exampleFrom&field-> exampleControl

我试过这个,没有成功:

this.exampleFrom.controls['exampleControl'].invalid 

我想在laravel项目中使用删除路由。

 Route::delete('/news/{id}', 'NewsController@destroy');

找不到node_modules/rxjs,而npm启动我的app.i已尝试过建议.没有成功.我正在使用quickstart repo form gihub click

我的systemjs.config.js文件

(function (global) {
  System.config({
    paths: {
      // paths serve as alias
      'npm:': 'node_modules/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      'app': 'app',

      // angular bundles
      '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
      '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
      '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
      '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
      '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
      '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
      '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',

      // other libraries
      'rxjs':                      'npm:rxjs',
      'angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js'
    },
    // packages tells the System loader how to load when …

我有打开按钮

<button mat-raised-button (click)="openModal()
"type="button" color="primary">Open Modal </button>

单击按钮按钮时，弹出模式打开并关闭后模式。cdk-focused并将cdk-program-focused类添加到此按钮并对此产生一些连锁反应。

我想摆脱这种风格，想要删除或覆盖那些在关闭模态后添加到按钮的类*