19 lines
595 B
JavaScript
19 lines
595 B
JavaScript
"use strict";
|
|
|
|
var toInteger = require("../../../number/to-integer")
|
|
, value = require("../../../object/valid-value")
|
|
, isValue = require("../../../object/is-value")
|
|
, min = Math.min
|
|
, max = Math.max;
|
|
|
|
module.exports = function (searchString/*, endPosition*/) {
|
|
var self, start, endPos;
|
|
self = String(value(this));
|
|
searchString = String(searchString);
|
|
endPos = arguments[1];
|
|
start =
|
|
(isValue(endPos) ? min(max(toInteger(endPos), 0), self.length) : self.length) -
|
|
searchString.length;
|
|
return start < 0 ? false : self.indexOf(searchString, start) === start;
|
|
};
|