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+# tr46
+
+An JavaScript implementation of [Unicode Technical Standard #46: Unicode IDNA Compatibility Processing](https://unicode.org/reports/tr46/).
+
+
+## Installation
+
+[Node.js](http://nodejs.org) ≥ 8 is required. To install, type this at the command line:
+```shell
+npm install tr46
+# or
+yarn add tr46
+```
+
+
+## API
+
+### `toASCII(domainName[, options])`
+
+Converts a string of Unicode symbols to a case-folded Punycode string of ASCII symbols.
+
+Available options:
+* [`checkBidi`](#checkBidi)
+* [`checkHyphens`](#checkHyphens)
+* [`checkJoiners`](#checkJoiners)
+* [`processingOption`](#processingOption)
+* [`useSTD3ASCIIRules`](#useSTD3ASCIIRules)
+* [`verifyDNSLength`](#verifyDNSLength)
+
+### `toUnicode(domainName[, options])`
+
+Converts a case-folded Punycode string of ASCII symbols to a string of Unicode symbols.
+
+Available options:
+* [`checkBidi`](#checkBidi)
+* [`checkHyphens`](#checkHyphens)
+* [`checkJoiners`](#checkJoiners)
+* [`processingOption`](#processingOption)
+* [`useSTD3ASCIIRules`](#useSTD3ASCIIRules)
+
+
+## Options
+
+### `checkBidi`
+Type: `Boolean`  
+Default value: `false`  
+When set to `true`, any bi-directional text within the input will be checked for validation.
+
+### `checkHyphens`
+Type: `Boolean`  
+Default value: `false`  
+When set to `true`, the positions of any hyphen characters within the input will be checked for validation.
+
+### `checkJoiners`
+Type: `Boolean`  
+Default value: `false`  
+When set to `true`, any word joiner characters within the input will be checked for validation.
+
+### `processingOption`
+Type: `String`  
+Default value: `"nontransitional"`  
+When set to `"transitional"`, symbols within the input will be validated according to the older IDNA2003 protocol. When set to `"nontransitional"`, the current IDNA2008 protocol will be used.
+
+### `useSTD3ASCIIRules`
+Type: `Boolean`  
+Default value: `false`  
+When set to `true`, input will be validated according to [STD3 Rules](http://unicode.org/reports/tr46/#STD3_Rules).
+
+### `verifyDNSLength`
+Type: `Boolean`  
+Default value: `false`  
+When set to `true`, the length of each DNS label within the input will be checked for validation.