title: how to set SharedArrayBuffer type bufferData in webgl?
body: <p>I try to use SharedArrayBuffer as a bufferData in webgl.</p>
  
  <p><a href="https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/bufferData" rel="nofollow noreferrer">MDN document</a> tell me that can be possible.</p>
  
  <p>I just Change"ArrayBuffer" to "SharedArrayBuffer" 
  why my code spit out error. </p>
  
  <blockquote>
    <p>[.WebGL-0x7fc1c209b800]GL ERROR :GL_INVALID_OPERATION : glDrawArrays:
    attempt to access out of range vertices in attribute 0</p>
  </blockquote>
  
  <pre><code>[Codepen](https://codepen.io/callin/pen/WLJdpq)
  </code></pre>