给定一个这样的字符串:

"The dog      has a long   tail, and it     is RED!"

什么样的jQuery或JavaScript魔法可以用来保持空间只有一个最大空间?

目标:

"The dog has a long tail, and it is RED!"

当前回答

更健壮的:

function trim(word)
{
    word = word.replace(/[^\x21-\x7E]+/g, ' '); // change non-printing chars to spaces
    return word.replace(/^\s+|\s+$/g, '');      // remove leading/trailing spaces
}

其他回答

一种更健壮的方法:如果存在初始空格和尾随空格,则该方法也会删除它们。例如:

// NOTE the possible initial and trailing spaces
var str = "  The dog      has a long   tail, and it     is RED!  "

str = str.replace(/^\s+|\s+$|\s+(?=\s)/g, "");

// str -> "The dog has a long tail, and it is RED !"

你的例子没有这些空格,但它们也是一个非常常见的场景,而公认的答案只是把它们精简成单个空格,比如:“the…红色!,这不是您通常需要的。

var str = "The      dog        has a long tail,      and it is RED!";
str = str.replace(/ {2,}/g,' ');

编辑: 如果你想替换所有类型的空白字符,最有效的方法是这样的:

str = str.replace(/\s{2,}/g,' ');

以下是对我来说很有效的解决方案:

var text = “ Tes ddas dMd WAlkman 3Dsfd ” .toLowerCase() .replace(/\b\s+/g, “ ”) .replace(/\b\w/g, s => s.toUpperCase()) .trimStart() .trimEnd(); 控制台.log(文本); 结果: Tes Ddas Dmd 随身听 3dsfd

//将多个空格替换为一个空格

String replacedDisplayName = displayName.replaceAll("\\s{2,}", " ");
var string = "The dog      has a long   tail, and it     is RED!";
var replaced = string.replace(/ +/g, " ");

或者如果你也想替换制表符:

var replaced = string.replace(/\s+/g, " ");