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                [TOC] ## **用js去除字符串空格** ### 方法一:使用replace正則匹配的方法 ``` 去除所有空格: str = str.replace(/\s*/g,""); 去除兩頭空格: str = str.replace(/^\s*|\s*$/g,""); 去除左空格: str = str.replace( /^\s*/, ""); 去除右空格: str = str.replace(/(\s*$)/g, ""); str為要去除空格的字符串,實例如下: var str = " 23 23 "; var str2 = str.replace(/\s*/g,""); console.log(str2); // 2323 ``` ### 方法二:使用str.trim()方法 ``` str.trim()局限性:無法去除中間的空格,實例如下: var str = " xiao ming "; var str2 = str.trim(); console.log(str2); //xiao ming 同理,str.trimLeft(),str.trimRight()分別用于去除字符串左右空格。 ``` ### 方法三:使用jquery,$.trim(str)方法 ``` $.trim(str)局限性:無法去除中間的空格,實例如下: var str = " xiao ming "; var str2 = $.trim(str) console.log(str2); // xiao ming ```
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