HI,
1,specify the correct doc type,
Criteria.
The Document Type declaration (DOCTYPE) is an instruction that sits at the top of your document. The DOCTYPE is required to tell the browser how to correctly display your page.
Why do I need it?
Without a proper DOCTYPE declaration, the browser tries to automatically assign a DOCTYPE to the page. This can slow down the rendering of your page and cause the page to be displayed inconsistently or incorrectly in different browsers. Consistency is the name of the game when it comes to accessibility.
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