| 'use strict'; |
| |
| const preserveCamelCase = string => { |
| let isLastCharLower = false; |
| let isLastCharUpper = false; |
| let isLastLastCharUpper = false; |
| |
| for (let i = 0; i < string.length; i++) { |
| const character = string[i]; |
| |
| if (isLastCharLower && /[a-zA-Z]/.test(character) && character.toUpperCase() === character) { |
| string = string.slice(0, i) + '-' + string.slice(i); |
| isLastCharLower = false; |
| isLastLastCharUpper = isLastCharUpper; |
| isLastCharUpper = true; |
| i++; |
| } else if (isLastCharUpper && isLastLastCharUpper && /[a-zA-Z]/.test(character) && character.toLowerCase() === character) { |
| string = string.slice(0, i - 1) + '-' + string.slice(i - 1); |
| isLastLastCharUpper = isLastCharUpper; |
| isLastCharUpper = false; |
| isLastCharLower = true; |
| } else { |
| isLastCharLower = character.toLowerCase() === character && character.toUpperCase() !== character; |
| isLastLastCharUpper = isLastCharUpper; |
| isLastCharUpper = character.toUpperCase() === character && character.toLowerCase() !== character; |
| } |
| } |
| |
| return string; |
| }; |
| |
| const camelCase = (input, options) => { |
| if (!(typeof input === 'string' || Array.isArray(input))) { |
| throw new TypeError('Expected the input to be `string | string[]`'); |
| } |
| |
| options = Object.assign({ |
| pascalCase: false |
| }, options); |
| |
| const postProcess = x => options.pascalCase ? x.charAt(0).toUpperCase() + x.slice(1) : x; |
| |
| if (Array.isArray(input)) { |
| input = input.map(x => x.trim()) |
| .filter(x => x.length) |
| .join('-'); |
| } else { |
| input = input.trim(); |
| } |
| |
| if (input.length === 0) { |
| return ''; |
| } |
| |
| if (input.length === 1) { |
| return options.pascalCase ? input.toUpperCase() : input.toLowerCase(); |
| } |
| |
| const hasUpperCase = input !== input.toLowerCase(); |
| |
| if (hasUpperCase) { |
| input = preserveCamelCase(input); |
| } |
| |
| input = input |
| .replace(/^[_.\- ]+/, '') |
| .toLowerCase() |
| .replace(/[_.\- ]+(\w|$)/g, (_, p1) => p1.toUpperCase()) |
| .replace(/\d+(\w|$)/g, m => m.toUpperCase()); |
| |
| return postProcess(input); |
| }; |
| |
| module.exports = camelCase; |
| // TODO: Remove this for the next major release |
| module.exports.default = camelCase; |