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Dartv/center element in container

Created October 3, 2016 13:21
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center element in container
const $chat = $('.chat-content');
const $message = $(ReactDOM.findDOMNode(component));
const msgOffset = $message.offset().top;
// center the linked message in the chat box
const elHeight = $message.height();
const chatHeight = $chat.height();
const offset = msgOffset - ((chatHeight / 2) - (elHeight / 2));
$chat.scrollTop(offset);
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