35 lines
932 B
Plaintext
35 lines
932 B
Plaintext
/*!
|
|
* String.prototype.codePointAt v0.2.0 | MIT (c) Mathias Bynens (@mathias)
|
|
* http://mths.be/codepointat
|
|
*
|
|
* code-point | MIT (c) Shinnosuke Watanabe
|
|
* https://github.com/shinnn/code-point.js
|
|
*/
|
|
var getCodePoint = typeof String.prototype.codePointAt === 'function' ? function getCodePoint(str) {
|
|
return str.codePointAt(0);
|
|
} : function getCodePoint(str) {
|
|
var first = str.charCodeAt(0);
|
|
|
|
if (first >= 0xD800 && first <= 0xDBFF && str.length > 1) {
|
|
var second = str.charCodeAt(1);
|
|
|
|
if (second >= 0xDC00 && second <= 0xDFFF) {
|
|
return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
|
|
}
|
|
}
|
|
|
|
return first;
|
|
};
|
|
|
|
export default function codePoint(str) {
|
|
if (typeof str !== 'string') {
|
|
throw new TypeError(String(str) + ' is not a string. Argument must be a string.');
|
|
}
|
|
|
|
if (str.length === 0) {
|
|
throw new Error('Argument must be a non-empty string.');
|
|
}
|
|
|
|
return getCodePoint(str);
|
|
}
|