Unfortunately, the above solutions did not help me, they only worked when I requested shadowRoot and was executed with a delay after loading the tweet:
Javascript
setTimeout((function() { return $('.twitter-tweet').each(function() { return $(this.shadowRoot).find('.EmbeddedTweet').css({ width: '99%', maxWidth: '100%' }); }); }), 2000);
CoffeeScript
setTimeout (-> $('.twitter-tweet').each () -> $(this.shadowRoot).find('.EmbeddedTweet').css width: '99%' maxWidth: '100%' ), 2000
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