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46 lines
1.7 KiB
46 lines
1.7 KiB
5 months ago
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var toValueString = require('./toValueString')
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var helperStringSubstring = require('./helperStringSubstring')
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var helperStringUpperCase = require('./helperStringUpperCase')
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var helperStringLowerCase = require('./helperStringLowerCase')
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var camelCacheMaps = {}
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/**
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* 将带字符串转成驼峰字符串,例如： project-name 转为 projectName
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*
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* @param {String} str 字符串
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* @return {String}
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*/
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function camelCase (str) {
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str = toValueString(str)
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if (camelCacheMaps[str]) {
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return camelCacheMaps[str]
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}
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var strLen = str.length
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var rest = str.replace(/([-]+)/g, function (text, flag, index) {
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return index && index + flag.length < strLen ? '-' : ''
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})
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strLen = rest.length
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rest = rest.replace(/([A-Z]+)/g, function (text, upper, index) {
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var upperLen = upper.length
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upper = helperStringLowerCase(upper)
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if (index) {
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if (upperLen > 2 && index + upperLen < strLen) {
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return helperStringUpperCase(helperStringSubstring(upper, 0, 1)) + helperStringSubstring(upper, 1, upperLen - 1) + helperStringUpperCase(helperStringSubstring(upper, upperLen - 1, upperLen))
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}
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return helperStringUpperCase(helperStringSubstring(upper, 0, 1)) + helperStringSubstring(upper, 1, upperLen)
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} else {
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if (upperLen > 1 && index + upperLen < strLen) {
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return helperStringSubstring(upper, 0, upperLen - 1) + helperStringUpperCase(helperStringSubstring(upper, upperLen - 1, upperLen))
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}
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}
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return upper
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}).replace(/(-[a-zA-Z])/g, function (text, upper) {
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return helperStringUpperCase(helperStringSubstring(upper, 1, upper.length))
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})
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camelCacheMaps[str] = rest
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return rest
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}
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module.exports = camelCase
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