As we know, if we want to submit data in the form, we just need to create a input or button element in the form and give them the submit value to the type attribute. Or using javascript to call form.submit().
But there is third way to submit form. That’s the implicit submission of form when pressing the enter key under some situations. The form implicit subbmission supported by all browsers, and html spec strongly recommand do this.
In HTML5, It adds a mount of elements, these elements are more easier to present the document in browser.
###Structure element
Before HTML5, we just use div tag to act as the Document Structure Element, but now the HTML5 supports more elements like section, article, nav, aside, header, footer and so on.
HTML5 adds new common attributes for original HTML Tag, and these attributes enhances the HTML elements’s function.
The contentEditable attribute supports most tags. The browser allows user edits the content of element if this attribute is set to true. These elements is not like input or textarea tags. They are not support editable content like table, div, span and so on these tags.