Scene: the definition of a global function, but when in use, an error XXX function or variable is not defined, but in fact has been clearly defined in js and correct
Cause of the problem: the scope of the problem because most of the calling procedure this.functionname or this.varname in this point of
Solution: In the function call, the function body refers to this outermost layer is added, var self = this;
Call function:
function(){
this Self = var; // this defines the function body refers to the outermost
if(){
self.functionB (); // a second layer, can be used normally
for(){
self.functionB (); // third layer may be used normally
}
}
}，
functionB（）{
}，