Example of a semi-colon crash in js _ javascript tips-js tutorial

The following js Code executes the braces no matter whether the if condition returns true or false. It turns out that if condition parentheses are followed by semicolons, causing a crash. The Code is as follows:

If ($ ("span", $ ("# txtStere"). siblings ("p"). text () = "*");
{
If (! IsNum ("# txtStere ")){
$ ("# TxtStere"). next (). text ("the shipping template you selected is based on the volume, and the logistics volume cannot be blank and must be a number ");
Return false;
} Else {
$ ("# TxtStere"). next (). text ("");
}
}

The above js Code will execute the braces no matter whether the if condition is true or false. After more than an hour, the handler does not understand what is going on. It crashes and crashes, at last, the ghost found the cause. if condition brackets are followed by semicolons (;), but they may crash!