This is called a fringe in some countries. Bangs in America have been commonly worn since the 19th century. They were less popular in Britain. Younger boys often were kept in bangs throughout the 1900s. Jacki's choice of hair cut for John Kennedy Jr. and the Beattles made bangs popular even for older boys in the 1960s and the style was commonly seen through the 1980s.
Bangs tend to be a very popular style for girls and little boys in Japan.
The style was popular among many boys at it required little care. Once it became an established style, however, and parents became insisting on it in the 1960s, boys becan to insist on longer hair which with Elvis Presley, the Beatles, and other rock stars was becoming more popular. Within the U.S., crewcut is used more broadly to refer to a range of short haircuts. In general the U.S. definition refers to a cut that is tapered at the back and sides but may be up to one inch on top. This actually included a range of styles in which the hair is cut so that the top of the hair is cut into a flat surface.