JSFiddle - React, Tailwind, and code Playground
JavaScript
var url = 'http://localhost:3000/_oauth/google#access_token=ya29.5HxuYol1Io8JLeGePDznbfkkwu_PC4uodKwG8_1clFYAn9AgdOV1WGpOTNQP3s76HAsn7Y4zWw&token_type=Bearer&expires_in=3600',
access_token = url.match(/\#(?:access_token)\=([\S\s]*?)\&/)[1];
alert(access_token);