我知道这是一个老答案，但这处理空格和_ (lodash)

function toCamelCase(s){
    return s
          .replace(/_/g, " ")
          .replace(/\s(.)/g, function($1) { return $1.toUpperCase(); })
          .replace(/\s/g, '')
          .replace(/^(.)/, function($1) { return $1.toLowerCase(); });
}

console.log(toCamelCase("Hello world");
console.log(toCamelCase("Hello_world");

// Both print "helloWorld"

function toCamelCase(str) {
  // Lower cases the string
  return str.toLowerCase()
    // Replaces any - or _ characters with a space 
    .replace( /[-_]+/g, ' ')
    // Removes any non alphanumeric characters 
    .replace( /[^\w\s]/g, '')
    // Uppercases the first character in each group immediately following a space 
    // (delimited by spaces) 
    .replace( / (.)/g, function($1) { return $1.toUpperCase(); })
    // Removes spaces 
    .replace( / /g, '' );
}

我试图找到一个JavaScript函数驼峰大小写字符串，并希望确保特殊字符将被删除(我有困难理解上面的一些答案正在做什么)。这是基于c c young的回答，添加了注释，并删除了$peci&l字符。

我最后是这样做的:

String.prototype.toCamelCase = function(str) {
    return str
        .replace(/\s(.)/g, function($1) { return $1.toUpperCase(); })
        .replace(/\s/g, '')
        .replace(/^(.)/, function($1) { return $1.toLowerCase(); });
}

我试图避免将多个替换语句链接在一起。函数中有1 2 3美元。但是这种类型的分组很难理解，你提到的跨浏览器问题也是我从未想过的。

您可以使用以下解决方案:

function toCamelCase(str){
  return str.split(' ').map(function(word,index){
    // If it is the first word make sure to lowercase all the chars.
    if(index == 0){
      return word.toLowerCase();
    }
    // If it is not the first word only upper case the first char and lowercase the rest.
    return word.charAt(0).toUpperCase() + word.slice(1).toLowerCase();
  }).join('');
}

以下所有14个排列产生相同的“equipmentClassName”结果。

String.prototype.toCamelCase = function() { return this.replace(/[^a-z ]/ig, '') // Replace everything but letters and spaces. .replace(/(?:^\w|[A-Z]|\b\w|\s+)/g, // Find non-words, uppercase letters, leading-word letters, and multiple spaces. function(match, index) { return +match === 0 ? "" : match[index === 0 ? 'toLowerCase' : 'toUpperCase'](); }); } String.toCamelCase = function(str) { return str.toCamelCase(); } var testCases = [ "equipment class name", "equipment class Name", "equipment Class name", "equipment Class Name", "Equipment class name", "Equipment class Name", "Equipment Class name", "Equipment Class Name", "equipment className", "equipment ClassName", "Equipment ClassName", "equipmentClass name", "equipmentClass Name", "EquipmentClass Name" ]; for (var i = 0; i < testCases.length; i++) { console.log(testCases[i].toCamelCase()); };

斯科特的回答稍作修改:

toCamelCase = (string) ->
  string
    .replace /[\s|_|-](.)/g, ($1) -> $1.toUpperCase()
    .replace /[\s|_|-]/g, ''
    .replace /^(.)/, ($1) -> $1.toLowerCase()

现在它也替换了'-'和'_'。