HTML, CSS, and JavaScript
HTML, CSS, and JavaScript are client-side technologies. These are extremely important for web applications, and a professional Java developer should have some knowledge of them. The developers who are experts in both areas are called full-stack developers these days, though I find the name a bit misleading. A certain understanding is inevitable.
HTML is the textual representation of a structured text. The text is given as characters, as in any text file. Tags represent the structure. A start tag starts with a <
character, then the name of the tag, then, optionally, name="value"
attributes, and finally a closing >
character. An end tag starts with </
, then the name of the tag, and then >
. Tags are enclosed in hierarchies; thus, you should not close a tag sooner than the one that was opened later. First, the tag that was opened last has to be closed, then the next, and so on. This way, any actual tag in the HTML has a level, and all tags that are between...