| 'use strict' |
| |
| var decode = require('parse-entities') |
| |
| module.exports = length |
| |
| var ampersand = '&' |
| |
| // Returns the length of HTML entity that is a prefix of the given string |
| // (excluding the ampersand), 0 if it does not start with an entity. |
| function length(value) { |
| var prefix |
| |
| /* istanbul ignore if - Currently also tested for at implemention, but we |
| * keep it here because that’s proper. */ |
| if (value.charAt(0) !== ampersand) { |
| return 0 |
| } |
| |
| prefix = value.split(ampersand, 2).join(ampersand) |
| |
| return prefix.length - decode(prefix).length |
| } |
