You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
28 lines
698 B
28 lines
698 B
4 years ago
|
|
||
|
|
const toString = Object.prototype.toString;
|
||
|
|
|
||
|
|
function isRegExp (o) {
|
||
|
|
return 'object' == typeof o
|
||
|
|
&& '[object RegExp]' == toString.call(o);
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = exports = function (regexp) {
|
||
|
|
if (!isRegExp(regexp)) {
|
||
|
|
throw new TypeError('Not a RegExp');
|
||
|
|
}
|
||
|
|
|
||
|
|
const flags = [];
|
||
|
|
if (regexp.global) flags.push('g');
|
||
|
|
if (regexp.multiline) flags.push('m');
|
||
|
|
if (regexp.ignoreCase) flags.push('i');
|
||
|
|
if (regexp.dotAll) flags.push('s');
|
||
|
|
if (regexp.unicode) flags.push('u');
|
||
|
|
if (regexp.sticky) flags.push('y');
|
||
|
|
const result = new RegExp(regexp.source, flags.join(''));
|
||
|
|
if (typeof regexp.lastIndex === 'number') {
|
||
|
|
result.lastIndex = regexp.lastIndex;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|