html5 basics pdf

Today's browsers often have a developer tool to help developers build more efficient websites.The developer tool has a console window (console window) for outputting some debugging information, and with this tool you can finally say goodbye to debugging JavaScript with alert. And the console's function is much more than just outputting a little bit of information about where it is now, it can also identify different kinds of information and provide hyperlinks to the corresponding code.The develo

The first digit in hexadecimal *16 + hex second digit = decimal15 == 1*16 + 5 = 2112 == 1*16 + 2 = 18FF == F*16 + F == 15*16 + 15 == 240 + 15 = 25500 == 0*16 + 0 = 0 6, hexadecimal abbreviation In CSS, as long as the hexadecimal color of each of the two values are the same, then you can be abbreviated to a For example:#FFEE00 == #FE0 Note the point: 1. If the current color corresponds to a different two-digit number, then it cannot be shortened

across sessions.If the user has logged in, not expire within 30 days. Record the user login ID in a cookie Session data storageBrowser off Auto Clear Total Capacity 5m/2.5m ie8+ Session data previously dependent on Web server storage can be further subdivided into servers and clients, and stored separately.Convenient front-end reading. Enhanced cookies from both capacity and API Each source 5m/2.5m ie8+ with cookies. Data storage expande