{"json_modified": "2016-06-27T05:06:19.133958", "uuid": "de41cbf1-cca8-4cac-8959-6e538eea4b27", "title": "XMLHttpRequestEventTarget.onloadstart", "url": "/en-US/docs/Web/API/XMLHttpRequestEventTarget/onloadstart", "tags": ["Event Handler", "API", "XMLHttpRequestEventTarget", "Reference", "Property", "Web"], "translations": [], "modified": "2016-06-27T05:06:18", "label": "XMLHttpRequestEventTarget.onloadstart", "localization_tags": [], "locale": "en-US", "id": 173831, "last_edit": "2016-06-27T04:03:30", "summary": "The <strong><code>XMLHttpRequestEventTarget.onloadstart</code></strong> is the function called when an <a href=\"/en-US/docs/Web/API/XMLHttpRequest\" title=\"XMLHttpRequest is an&#xA0;API that provides client functionality for transferring data between a client and a server. It provides an easy way to retrieve data from a URL without having to do a full page refresh. This enables a Web page to update just a part of the page without disrupting what the user is doing.\"><code>XMLHttpRequest</code></a> transaction starts transferring data.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Values", "title": "Values"}, {"id": "Example", "title": "Example"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}], "slug": "Web/API/XMLHttpRequestEventTarget/onloadstart", "review_tags": []}