24. browser object model BOM

javascript from ecmascript,DOM,BOM form , We have already got a general understanding of the first two , Start with this chapter BOM

BOM Can handle the advance of the browser , back off , Browser stretch , Scroll bar scrolling and other functions

JavaScript The standardization organization is ECMA,DOM The organization for standardization is W3C,BOM There is no standardization organization , So the compatibility will be poor

BOM The top-level object of is window,window contain document, therefore BOM The scope of DOM Big

The variables we define are actually stored in BOM in

because window There are many built-in properties in , So we'd better not use some variable names , such as name

Functions are also stored in BOM in

When calling, you can omit window. Used before alert(),prompt() All belong to BOM The method in