javascript

Js intercepts two kinds of method of string and distinction detailed explanation

Var long2 = “1988-0 w - 07”;

Alert (long2. Substring (0, 4) + ”— — — — — -” + long2. Substring (5, 6));     1988 — — — — — - 0

Alert (long2. Substr (0, 4) + ”— — — — — -” + long2, substr (5, 2));                       1988-0 w

Coordinates   when substring is intercepted; Including the front   Not including the back