index.js
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/*!
* preserve <https://github.com/jonschlinkert/preserve>
*
* Copyright (c) 2014-2015, Jon Schlinkert.
* Licensed under the MIT license.
*/
'use strict';
/**
* Replace tokens in `str` with a temporary, heuristic placeholder.
*
* ```js
* tokens.before('{a\\,b}');
* //=> '{__ID1__}'
* ```
*
* @param {String} `str`
* @return {String} String with placeholders.
* @api public
*/
exports.before = function before(str, re) {
return str.replace(re, function (match) {
var id = randomize();
cache[id] = match;
return '__ID' + id + '__';
});
};
/**
* Replace placeholders in `str` with original tokens.
*
* ```js
* tokens.after('{__ID1__}');
* //=> '{a\\,b}'
* ```
*
* @param {String} `str` String with placeholders
* @return {String} `str` String with original tokens.
* @api public
*/
exports.after = function after(str) {
return str.replace(/__ID(.{5})__/g, function (_, id) {
return cache[id];
});
};
function randomize() {
return Math.random().toString().slice(2, 7);
}
var cache = {};