This question already has answers here:
What is the functionality of !DOCTYPE?
(5 answers)
Closed 7 years ago.
In modern HTML, is there a purpose to having a Doctype tag to start an HTML page? I'm wondering because when I add or remove it, nothing changes.
It helps the browser render the code correctly.
Related
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Can we make Print button without JavaScript?
(4 answers)
Closed 6 months ago.
I am creating a web page for a special browser, which does not support JavaScript, only HTML, how can I print the page without JavaScript?
Browsers provide no features for printing documents which are not triggered by:
JavaScript
The browser's own UI
This question already has answers here:
How to apply CSS to iframe?
(28 answers)
Closed 5 years ago.
I'm trying to use an iFrame to display an HTML webpage from an external source but, I can't get it to work with CSS.
You cannot do that (the browser won't let you, for security reason). If the external content of the iFrame is from the same server as the root page, then you can use javascript but no css from the root html.
This question already has answers here:
How to use variable in CSS? [duplicate]
(3 answers)
Closed 8 years ago.
Or is it even possible to use variables to a single stylesheet without the use of preprocessors?
CSS at present does not support variables. Mozilla does have a proposal, but it is not widely implemented.
This question already has answers here:
How to mark-up phone numbers?
(14 answers)
What's a reliable method for setting up telephone links for mobile browsers?
(3 answers)
Closed 9 years ago.
I am using a html anchor tag with tel attribute.but it not working on all mobile browsers.I serached on google for its solution but not found any solution.Any help will be appreciated
I am using below code for phone call.
1-847-555-5555
This question already has answers here:
Does my HTML5 doctype have to be on the VERY first line?
(6 answers)
Closed 9 years ago.
Is it valid to have blank line returns preceding the doctype declaration?
The <!DOCTYPE> declaration must be the very first thing in your HTML
document, before the <html> tag.
via w3schools
Not necessarily; BOM, whitespace and comments may come first.
http://www.w3.org/TR/html-markup/documents.html#syntax-document-html
So yeah, it must come first, before any actual HTML tags, but note that you can't really ever put doctype before BOM.