{"json_modified": "2016-03-28T08:28:57.191972", "uuid": "98661f93-9af1-41f3-b044-960487ac977f", "title": "ProgressEvent.lengthComputable", "url": "/en-US/docs/Web/API/ProgressEvent/lengthComputable", "tags": ["Property", "ProgressEvent", "API", "Progress Events"], "translations": [], "modified": "2015-02-22T20:06:07", "label": "ProgressEvent.lengthComputable", "localization_tags": [], "locale": "en-US", "id": 81201, "last_edit": "2015-02-22T11:05:22", "summary": "The <code><strong>ProgressEvent.lengthComputable</strong></code> read-only property is a <a href=\"/en-US/docs/Web/API/Boolean\" title=\"The Boolean object is an object wrapper for a boolean value.\"><code>Boolean</code></a> flag indicating if the resource concerned by the <a href=\"/en-US/docs/Web/API/ProgressEvent\" title=\"The ProgressEvent interface represents events measuring progress of an underlying process, like an HTTP request (for an XMLHttpRequest, or the loading of the underlying resource of an &lt;img&gt;, &lt;audio&gt;, &lt;video&gt;, &lt;style&gt; or &lt;link&gt;).\"><code>ProgressEvent</code></a> has a length that can be calculated. If not, the <a href=\"/en-US/docs/Web/API/ProgressEvent/total\" title=\"The ProgressEvent.total read-only property is an unsigned long long representing the total amount of work that the underlying process is in the progress of performing. When downloading a resource using HTTP, this only represent the content itself, not headers and other overhead.\"><code>ProgressEvent.total</code></a> property has no significant value.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/API/ProgressEvent/lengthComputable", "review_tags": []}