blocks|key|4682561|text|看看ucwords+from+php.js+--这似乎就是你要找的东西。基本上，它是：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4682562|function+ucwords+(str)+{
++++return+(str+%2B+'').replace(/%5E([a-z])%7C\s%2B([a-z])/g,+function+($1)+{
++++++++return+$1.toUpperCase();
++++});
}|code-block|syntax|javascript|4682563|请注意，THIS+IS+A+TEST将返回THIS+IS+A+TEST，因此您必须像这样使用它：|style|CODE|4682564|var+oldstring+=+"THIS+IS+A+TEST";
var+newstring+=+ucwords(oldstring.toLowerCase());|4682565|或者稍微修改一下函数：|4682566|function+ucwords+(str)+{
++++str+=+(str+%2B+'').toLowerCase();
++++return+str.replace(/%5E([a-z])%7C\s%2B([a-z])/g,+function+($1)+{
++++++++return+$1.toUpperCase();
++++});
}
var+oldstring+=+"THIS+IS+A+TEST";
var+newstring+=+ucwords(oldstring);+//+This+Is+A+Test|4682567|entityMap|0|LINK|mutability|MUTABLE|url|http://phpjs.org/functions/ucwords:569^0|2|J|0|0|0|4|E|L|E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|15|8|@$A|16|B|17|K|L]|$A|18|B|19|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|O|3|P|5|6|7|1B|8|@]|9|@]|C|$]]|$1|Q|3|R|5|F|7|1C|8|@]|9|@]|C|$G|H]]|$1|S|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

take a look at <a href="http://phpjs.org/functions/ucwords:569" rel="nofollow">ucwords from php.js</a> - this seems to be kind of what you're looking for. basically, it's:

<pre><code>function ucwords (str) {
 return (str + '').replace(/^([a-z])|\s+([a-z])/g, function ($1) {
 return $1.toUpperCase();
 });
}
</code></pre>

note that <code>THIS IS A TEST</code> will return <code>THIS IS A TEST</code> so you'll have to use it like this:

<pre><code>var oldstring = "THIS IS A TEST";
var newstring = ucwords(oldstring.toLowerCase());
</code></pre>

or modify the function a bit:

<pre><code>function ucwords (str) {
 str = (str + '').toLowerCase();
 return str.replace(/^([a-z])|\s+([a-z])/g, function ($1) {
 return $1.toUpperCase();
 });
}
var oldstring = "THIS IS A TEST";
var newstring = ucwords(oldstring); // This Is A Test
</code></pre>

blocks|key|1904166|text|"tHiS+iS+a+tESt".replace(/[%5E\s]%2B/g,+function(str){+
++++return+str.substr(0,1).toUpperCase()%2Bstr.substr(1).toLowerCase();
++});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1904167|其他变体：|unstyled|1904168|"tHiS+iS+a+tESt".replace(/(\S)(\S*)/g,+function($0,$1,$2){+
++++return+$1.toUpperCase()%2B$2.toLowerCase();
++});|1904169|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>"tHiS iS a tESt".replace(/[^\s]+/g, function(str){ 
 return str.substr(0,1).toUpperCase()+str.substr(1).toLowerCase();
 });
</code></pre>

Other variant:

<pre><code>"tHiS iS a tESt".replace(/(\S)(\S*)/g, function($0,$1,$2){ 
 return $1.toUpperCase()+$2.toLowerCase();
 });
</code></pre>

blocks|key|6097003|text|function+capitalizeEachWord(str)
{
+++var+words+=+str.split("+");
+++var+arr+=+[];
+++for+(i+in+words)
+++{
++++++temp+=+words[i].toLowerCase();
++++++temp+=+temp.charAt(0).toUpperCase()+%2B+temp.substring(1);
++++++arr.push(temp);
+++}
+++return+arr.join("+");
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|6097004|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>function capitalizeEachWord(str)
{
 var words = str.split(" ");
 var arr = [];
 for (i in words)
 {
 temp = words[i].toLowerCase();
 temp = temp.charAt(0).toUpperCase() + temp.substring(1);
 arr.push(temp);
 }
 return arr.join(" ");
}
</code></pre>

blocks|key|4682613|text|这是我用来完成这项工作的一小段代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4682614|var+str+=+'this+is+an+example';
str.replace(/\b./g,+function(m){+return+m.toUpperCase();+});|code-block|syntax|javascript|4682615|但是John+Resig做了一个非常棒的脚本，它处理了很多案例http://ejohn.org/blog/title-capitalization-in-javascript/|offset|length|4682616|更新|style|BOLD|4682617|ES6%2B答案：|4682618|str.split('+').map(s+=>+s.charAt(0).toUpperCase()+%2B+s.slice(1)).join('+');|CODE|4682619|可能还有比这更好的方法。它将在重音字符上工作。|4682620|entityMap|0|LINK|mutability|MUTABLE|url|http://ejohn.org/blog/title-capitalization-in-javascript/^0|0|0|V|1L|0|0|0|2|0|0|0|22|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|15|8|@]|9|@$I|16|J|17|1|18]]|A|$]]|$1|K|3|L|5|6|7|19|8|@$I|1A|J|1B|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@$I|1E|J|1F|M|S]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1G|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12]]]]

Here's a little one liner that I'm using to get the job done 

<pre><code>var str = 'this is an example';
str.replace(/\b./g, function(m){ return m.toUpperCase(); });
</code></pre>

but John Resig did a pretty awesome script that handles a lot of cases 
<a href="http://ejohn.org/blog/title-capitalization-in-javascript/" rel="noreferrer">http://ejohn.org/blog/title-capitalization-in-javascript/</a>

Update 

ES6+ answer: 

<code>str.split(' ').map(s =&gt; s.charAt(0).toUpperCase() + s.slice(1)).join(' ');</code> 

There's probably an even better way than this. It will work on accented characters.

blocks|key|6097046|text|这将使由空格或破折号分隔的每个单词大写|type|unstyled|depth|inlineStyleRanges|entityRanges|data|6097047|function+capitalize(str){
++++str+=+str.toLowerCase();
++++return+str.replace(/([%5E+-])([%5E+-]*)/gi,function(v,v1,v2){+return+v1.toUpperCase()%2Bv2;+});
}|code-block|syntax|javascript|6097048|示例：|6097049|6097050|i+lOvE+oRanges+=>我爱橙子|unordered-list-item|6097051|一个奇特的语法=>一个奇特的语法|6097052|6097053|等|6097054|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|X|8|@]|9|@]|A|$]]|$1|M|3|N|5|L|7|Y|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|10|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|S|$]]

This will capitalize every word seperated by a space or a dash

<pre><code>function capitalize(str){
 str = str.toLowerCase();
 return str.replace(/([^ -])([^ -]*)/gi,function(v,v1,v2){ return v1.toUpperCase()+v2; });
}
</code></pre>

Examples :

<ul>
<li>i lOvE oRanges => I Love Oranges</li>
<li>a strAnge-looKing syntax => A Strange-Looking Syntax</li>
</ul>

etc

blocks|key|1899570|text|这是一个简单的解决方案，它将句子分解为一个数组，然后循环遍历该数组，并使用大写的单词创建一个新的数组。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1899571|+function+capitalize(str){

++var+strArr+=+str.split("+");
++var+newArr+=+[];

++for(var+i+=+0+;+i+<+strArr.length+;+i%2B%2B+){

++++var+FirstLetter+=+strArr[i].charAt(0).toUpperCase();
++++var+restOfWord+=+strArr[i].slice(1);

++++newArr[i]+=+FirstLetter+%2B+restOfWord;

++}

++return+newArr.join('+');

}|code-block|syntax|javascript|1899572|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is a simple solution that breaks down the sentence into an array, then loops through the array creating a new array with the capitalized words.

<pre><code> function capitalize(str){

 var strArr = str.split(" ");
 var newArr = [];

 for(var i = 0 ; i &lt; strArr.length ; i++ ){

 var FirstLetter = strArr[i].charAt(0).toUpperCase();
 var restOfWord = strArr[i].slice(1);

 newArr[i] = FirstLetter + restOfWord;

 }

 return newArr.join(' ');

}
</code></pre>

blocks|key|4682686|text|如果您不介意使用库，您可以使用+|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4682687|全部大写(+|4682688|+=+false+)将字符串中的第一个字符大写，而将所有其他字母小写。如果all为true，则字符串中的所有单词都将大写。|blockquote|4682689|4682690|4682691|示例：|4682692|'hello+kitty'.capitalize()+++++->+'Hello+kitty'
'hello+kitty'.capitalize(true)+->+'Hello+Kitty'|code-block|syntax|javascript|4682693|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|W|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|X|8|@]|9|@]|A|$N|O]]|$1|P|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|Q|$]]

If you don't mind using a library, you could use <a href="http://sugarjs.com/" rel="nofollow">Sugar.js</a> <a href="http://sugarjs.com/api/String/capitalize" rel="nofollow">capitalize()</a>

<blockquote>
 capitalize( all = false ) Capitalizes the first character in the
 string and downcases all other letters. If all is true, all words in
 the string will be capitalized.
</blockquote>

Example:

<pre><code>'hello kitty'.capitalize() -&gt; 'Hello kitty'
'hello kitty'.capitalize(true) -&gt; 'Hello Kitty'
</code></pre>

blocks|key|2569588|text|您也可以使用以下使用filter的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2569589|function+Ucwords(str){
++++var+words+=+str.split('+');
++++var+arr+=+[];
++++words.filter(function(val){
++++++++arr.push(val.charAt(0).toUpperCase()%2B+val.substr(1).toLowerCase());+++++++++++++
++++})
++++console.log(arr.join("+").trim());
++++return+arr.join("+").trim();
}

Ucwords("THIS+IS+A+TEST")+//This+Is+A+Test

Ucwords("THIS+")+//This|code-block|syntax|javascript|2569590|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

you can also use below approach using filter:

<pre><code>function Ucwords(str){
 var words = str.split(' ');
 var arr = [];
 words.filter(function(val){
 arr.push(val.charAt(0).toUpperCase()+ val.substr(1).toLowerCase()); 
 })
 console.log(arr.join(" ").trim());
 return arr.join(" ").trim();
}

Ucwords("THIS IS A TEST") //This Is A Test

Ucwords("THIS ") //This
</code></pre>

blocks|key|4682714|text|{
++++++++String+s+=+"this+is+for+testing";
++++++++String+sw[]+=+s.split("\\s");
++++++++String+newS+=+"";
++++++++for(int+i=0;+i<=sw.length-1;+i%2B%2B)
++++++++{
++++++++++++String+first+=+sw[i].substring(0,1);
++++++++++++String+last+=+sw[i].substring(1);
++++++++++++newS%2B=+first.toUpperCase()%2Blast%2B"+";
++++++++++++
++++++++}
++++++++System.out.println(newS);
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4682715|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>{
 String s = &quot;this is for testing&quot;;
 String sw[] = s.split(&quot;\\s&quot;);
 String newS = &quot;&quot;;
 for(int i=0; i&lt;=sw.length-1; i++)
 {
 String first = sw[i].substring(0,1);
 String last = sw[i].substring(1);
 newS+= first.toUpperCase()+last+&quot; &quot;;
 
 }
 System.out.println(newS);
 }
</code></pre>

I want to use a javascript function to capitalize the first letter of every word 

eg:

<pre><code>THIS IS A TEST ---&gt; This Is A Test
this is a TEST ---&gt; This Is A Test
this is a test ---&gt; This Is A Test
</code></pre>

What would be a simple javascript function

Capitalize the first letter of every word

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想使用javascript函数来大写每个单词的第一个字母。例如：THIS IS A TEST ---> This Is A Testthis is a TEST ---> This Is A Testthis is a test ---> This Is A Test什么是简单的javascript函数？

问将每个单词的第一个字母大写
EN

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问将每个单词的第一个字母大写EN