7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li> <li><a href="https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Data_structures#%E5%8E%9F%E5%A7%8B%E5%80%BC%E5%BC%BA%E5%88%B6%E8%BD%AC%E6%8D%A2" target="_blank" rel="noopener noreferrer">原始值强制转换<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" hei