String.prototype.startsWith

Returns true if the string starts with the specified substring.

Syntax

startsWith(searchString, startIndex?)

Parameters

• searchString

  The substring to search for at the start of the string.

• startIndex optional

  The index at which to begin searching. If omitted, search starts at the beginning of the string.

Return value

true if the string starts with the specified substring; otherwise, false.

Examples

"banana".startsWith("ba")

true

"banana".startsWith("na")

false