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I am adding element dynamically to DOM.
$('<div class="entry"></div>').text(data.status).appendTo(app.twitter_feed);
I want to get element height before it is added to DOM. The usual approach is to add the element within a hidden element with the same style and then simply see what is the height.
Though, is it imposible to calculate element height if you know container’s width, padding and line-height (content is only plain-text) and content?
How the content wraps inside a container may depend on browser and zoom level, so unless you’re very sure the content will never wrap, I would advise determining the height the way you have described.