@luxuryescapes/lib-voucher-code
v2.0.0
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Voucher Code Generator
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Coupon Code Generator
Generate unique, hard to guess coupon, voucher codes.
Use cases: promo codes, loyalty coupons, gift vouchers, in-app purchases
This library originates from Voucherify.
Installation
In Node.js
Install with npm:
$ npm install --save voucher-code-generator
Include with require:
var voucher_codes = require('voucher-code-generator');
In a browser
<script src="voucher_codes.js"></script>
Usage
Generate 5 codes, each 8 characters long:
voucher_codes.generate({
length: 8,
count: 5
});
Sample result: ["FR6bwx1q", "ByamOdWV", "7roFwfQs", "rmWlwvll", "pgih5eAB"]
Charset
Default charset is alphanumeric (numbers and letters). However, you can specify your own charset:
voucher_codes.generate({
length: 6,
count: 3,
charset: "0123456789"
});
Sample result: ["386525", "676442", "019075"]
You can also use one of the predefined charsets by calling voucher_codes.charset(name)
.
| name | charset |
|------------------|--------------------------------------------------------------------|
| "numbers"
| "0123456789"
|
| "alphabetic"
| "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
| "alphanumeric"
| "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
For example:
voucher_codes.generate({
length: 5,
count: 4,
charset: voucher_codes.charset("alphabetic")
});
Result: ["odghy", "kZEYc", "eOTCl", "wVCzD"]
Prefix and Postfix
You can optionally surround each generated code with a prefix and/or postfix.
For instance:
voucher_codes.generate({
prefix: "promo-",
postfix: "-2015"
});
Result: ["promo-WZ4x1t3U-2015"]
Pattern
Codes may follow a specified pattern. Use hash (#
) as a placeholder for random characters.
Notice that if pattern
is specified then length
is ignored.
Example:
voucher_codes.generate({
pattern: "##-###-##",
});
Result: ["P7-ofW-Ka"]
Infeasible configs
There exist some configs that are not feasible. For example it's not possible to generate 1000 codes if you want
your codes to be 2 characters long and consisting only of numbers. Voucher code generator detects such cases and
throws an error "Not possible to generate requested number of codes."
.
try {
voucher_codes.generate({
count: 1000,
length: 2,
charset: "0123456789"
})
catch (e) {
console.log("Sorry, not possible.");
}
Config reference
| attribute | default value | description |
|------------------|:--------------:|---------------------------------------------------------------------------------|
| length
| 8
| Number of characters in a generated code (excluding prefix and postfix) |
| count
| 1
| Number of codes generated. |
| charset
| alphanumeric
| Characters that can appear in the code. |
| prefix
| ""
| A text appended before the code. |
| postfix
| ""
| A text appended after the code. |
| pattern
| "########"
| A pattern for codes where hashes (#
) will be replaced with random characters. |
Testing
Install dependencies:
npm install
Run tests:
npm run test
License
Code released under the MIT license.