How to use:
Copy Code code as follows:
Str.substring (start, end)
"String Literal". Substring (start, end)
Where "Start" indicates the starting position of the string to intercept, starting at 0.
"End" indicates the ending position of the string to intercept, starting at 0.
The substring () function method in JavaScript returns a string containing a substring from start to the last (not including end).
The substring () function method in JavaScript uses the smaller values from both start and end as the starting point for substrings. For example, strvar.substring (0, 3) and strvar.substring (3, 0) will return the same substring. If start or end is Nan or negative, replace it with 0. The length of the substring equals the absolute value of the difference between start and end. For example, the length of the substring returned in strvar.substring (0, 3) and strvar.substring (3, 0) is 3.
The following example shows the use of the SUBSTRING function method in javascript:
<script type= "Text/javascript" > Function Substringdemo () {var SS;//DECLARE variable. var s = "The rain in Spain falls mainly in the plain ..."; SS = S.substring (12, 17); Takes a substring. return (SS); Returns a substring. Alert (Substringdemo ()); </script>
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
