startsWith (JavaScript)
Checks whether a string starts with a substring.
Defined in
String (Standard - JavaScript)Syntax
startsWith(str:string) : boolean| Parameters | Description |
|---|---|
str |
The substring. |
| Return value | Description |
|---|---|
boolean |
True if this string starts with the substring, or the substring is empty. |
Examples
(1) The following comparison is true.var cities = new String("Paris Moscow Tokyo");
if (cities.startsWith("Paris"))
return "Starts with Paris";
else
return "Does not start with Paris"(2) The following
comparison is false.
var cities = new String("Paris Moscow Tokyo");
if (cities.startsWith("paris"))
return "Starts with Paris";
else
return "Does not start with Paris"