javascript - 在JavaScript中修剪字符串？(Trim string in JavaScript?)

Question

如何修剪JavaScript中的字符串？

  ask by Vinod translate from so

Answer 1

All browsers since IE9+ have trim() method for strings.

(自IE9 +起，所有浏览器都具有trim()方法来处理字符串。)

For those browsers who does not support trim() , you can use this polyfill from MDN :

(对于不支持trim()浏览器，可以使用MDN中的以下polyfill：)

if (!String.prototype.trim) {
    (function() {
        // Make sure we trim BOM and NBSP
        var rtrim = /^[suFEFFxA0]+|[suFEFFxA0]+$/g;
        String.prototype.trim = function() {
            return this.replace(rtrim, '');
        };
    })();
}

---

That said, if using jQuery , $.trim(str) is also available and handles undefined/null.

(也就是说，如果使用jQuery ，则$.trim(str)也是可用的，并且可以处理未定义/空值。)

---

See this:

(看到这个：)

String.prototype.trim=function(){return this.replace(/^s+|s+$/g, '');};

String.prototype.ltrim=function(){return this.replace(/^s+/,'');};

String.prototype.rtrim=function(){return this.replace(/s+$/,'');};

String.prototype.fulltrim=function(){return this.replace(/(?:(?:^|
)s+|s+(?:$|
))/g,'').replace(/s+/g,' ');};