angular-docs-cn/aio/content/marketing/contribute.html

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  <h1 class="banner-headline no-toc no-anchor">Contribute to Angular</h1>
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  <h2 class="no-anchor">Angular Projects</h2>

  <p>We'd love for you to contribute to our source code and to make Angular projects even better.</p>

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      <h3 class="no-anchor">Angular</h3>

      Angular is a next generation mobile and desktop application development platform.

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    <a href="https://github.com/angular/angular/blob/master/CONTRIBUTING.md" class="button button-blue" md-button>Contribute</a>
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      <h3 class="no-anchor">Angular Material</h3>

      Our goal is to deliver a lean, lightweight set of Angular-based UI elements that implement the material design specification
      for use in Angular single-page applications (SPAs).

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    <a href="https://github.com/angular/material2/blob/master/CONTRIBUTING.md" class="button button-blue" md-button>Contribute</a>
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      <h3 class="no-anchor">AngularFire</h3>

      AngularFire is the officially supported Angular binding for Firebase. Firebase is a full backend so you don't need servers
      to build your Angular app.

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    <a href="https://github.com/angular/angularfire2" class="button button-blue" md-button> Contribute</a>
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