html - Alternative to <content> tag in HTML5? -

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i reading today shadow dom, author used <content> tag pull in textcontent host.

tutorial: http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/

when looked up, found <content> tag has been deprecated , should avoided. should now? should learn use <content> tag or not? source: mozilla documentation

the same documentation (mozilla firefox) states:

it has been replaced <slot> element.

use <slot> element. when deprecated, should no longer use it. (mozilla states this.) deprecated means no longer approved of/disapproved.


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