Sha256: 8091896a95a19cb04ad8dd4793263243f02968cfc4b838862b4aed1d96cbbfa5
Contents?: true
Size: 1.12 KB
Versions: 25
Compression:
Stored size: 1.12 KB
Contents
var toInteger = require('../internals/to-integer');
var requireObjectCoercible = require('../internals/require-object-coercible');
// `String.prototype.{ codePointAt, at }` methods implementation
var createMethod = function (CONVERT_TO_STRING) {
return function ($this, pos) {
var S = String(requireObjectCoercible($this));
var position = toInteger(pos);
var size = S.length;
var first, second;
if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
first = S.charCodeAt(position);
return first < 0xD800 || first > 0xDBFF || position + 1 === size
|| (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF
? CONVERT_TO_STRING ? S.charAt(position) : first
: CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
};
};
module.exports = {
// `String.prototype.codePointAt` method
// https://tc39.github.io/ecma262/#sec-string.prototype.codepointat
codeAt: createMethod(false),
// `String.prototype.at` method
// https://github.com/mathiasbynens/String.prototype.at
charAt: createMethod(true)
};
Version data entries
25 entries across 25 versions & 7 rubygems