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keksAccountGUI/node_modulesOLD/stylus/lib/functions/substr.js

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2019-08-11 18:48:02 +00:00
var utils = require('../utils')
, nodes = require('../nodes');
/**
* Returns substring of the given `val`.
*
* @param {String|Ident} val
* @param {Number} start
* @param {Number} [length]
* @return {String|Ident}
* @api public
*/
module.exports = function substr(val, start, length){
utils.assertString(val, 'val');
utils.assertType(start, 'unit', 'start');
length = length && length.val;
var res = val.string.substr(start.val, length);
return val instanceof nodes.Ident
? new nodes.Ident(res)
: new nodes.String(res);
};