What are the potential consequences of not including a valid document type declaration in HTML code?

Not including a valid document type declaration in HTML code can result in the browser rendering the page in quirks mode, which may lead to inconsistent display across different browsers and devices. To solve this issue, make sure to include a valid document type declaration at the beginning of your HTML code to ensure consistent rendering. ```html <!DOCTYPE html> <html> <head> <title>Your Title Here</title> </head> <body> <!-- Your HTML content here --> </body> </html> ```

Keywords

HTML document type declaration DTD validation rendering

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