Includes
Includes#
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/String/includes
Syntax: Includes(str, searchString string[, position int]) bool
- str - string
 - searchString - A string to be searched for within str.
 - position - [Optional], The position within the string at which to begin searching for searchString. (Defaults to 0.)