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Some people state that changing the CSS via the style object is a bad practice.

For example doing something like this: 

document.getElementById('message').style.fontWeight = 'bold';

Instead one should add / remove classes for influencing the layout.

Unfortunately nobody becomes precise why it is bad to use the style-object.

Therefore my question here:

Can someone explain why one shall avoid this technique?

bo256
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  • It is personal opinion and using classes is normally better since you know where the styles are at. Sometimes you will see someone setting 10 style properties in a row and that is just a bad idea. – epascarello Jan 20 '16 at 13:57
  • With the above, you are going to add inline styles. And why inline styles are bad, here is a good reasoning - http://stackoverflow.com/questions/2612483/whats-so-bad-about-in-line-css – Nikhil Aggarwal Jan 20 '16 at 13:58
  • because it mixes program logic with presentation – Alnitak Jan 20 '16 at 14:02

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