Study Notes on JavaScript advanced programming (2): Saving notes on common JavaScript syntax

1. For in statement
Strict iteration statements, similar to C # foreach
For (sprop in window)
{
Alert (sprop );
}

2. label Label
Label: Statement
Usually, nested loops jump out. For example
Outermost:
For (VAR I = 0; I <10); I ++)
{
For (var j = 0; j <10; j ++)
{
If (j = 5)
Break outermost;
}
}

It not only jumps out of the inner loop, but also out of the outer loop.

3. With statement
He runs slowly.CodeTo avoid using
VaR smessage = "Hello World ";
With (smessage ){
Alert (touppercase (); // outputs "Hello World"
}