When i was started my career in web development. I was always search these codes in google for my each website development.
This will very helpfull for web designer who started his career.
Add Fav icon in website
<link href="/YOUR_PATH/favicon.ico" rel="icon" type="image/x-icon" />
Add Calling and SMS link for iPhone in HTML
<a href="tel:1-234-567-8910">Call - 1-234-567-8910</a> <a href="sms:1-234-567-8910">Send a SMS </a>
Add Email link in HTML
<a href="mailto:firstname.lastname@example.org">Email Us</a>
Redirect a webpage to another link
<meta http-equiv="refresh" content="0; url=http://website.com/" />
Create a Back Button using HTML and JS
<input type="button" value="Back" onclick="history.back()" />