expert-m /
react-split-testing
| Total Complexity | 7 |
| Complexity/F | 3.5 |
| Lines of Code | 36 |
| Function Count | 2 |
| Duplicated Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
| 1 | function generateIdentifier() { |
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| 2 | const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789' |
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| 3 | let text = '' |
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| 4 | |||
| 5 | for (let i = 0; i < 20; i++) { |
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| 6 | text += possible.charAt(Math.floor(Math.random() * possible.length)) |
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| 7 | } |
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| 8 | |||
| 9 | return text |
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| 10 | } |
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| 11 | |||
| 12 | export default function getIdentifier(userIdentifier) { |
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| 13 | if (userIdentifier || userIdentifier === 0) { |
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| 14 | return String(userIdentifier) |
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| 15 | } |
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| 16 | |||
| 17 | if (typeof window === 'undefined' || !('localStorage' in window)) { |
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| 18 | return null |
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| 19 | } |
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| 20 | |||
| 21 | const key = '__ab_experiment_identifier__' |
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| 22 | |||
| 23 | try { |
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| 24 | userIdentifier = localStorage.getItem(key) |
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| 25 | userIdentifier = userIdentifier && String(userIdentifier) |
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| 26 | |||
| 27 | if (!userIdentifier) { |
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| 28 | userIdentifier = generateIdentifier() |
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| 29 | localStorage.setItem(key, userIdentifier) |
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| 30 | } |
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| 31 | } catch (exception) { |
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| 32 | return null |
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| 33 | } |
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| 34 | |||
| 35 | return userIdentifier |
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| 36 | } |
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| 37 |
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This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed.
To learn more about declaring variables in Javascript, see the MDN.