javascript - 如何修改字符串内部字符，Javascript正则表达式

Question

修改方法:

var a = ' z this is ok z ';
a = a.replace(/z(.*)z/, function(match){ return match.trim().toUpperCase();});
console.log(a); // output: " Z THIS IS OK Z "

我希望“ZTHIS IS OKZ”；

大写字母起作用，但 trim 功能被忽略

Answer 1

您正在将空格与(*) 匹配。更改为:

var a = ' z this is ok z ';

// Here, you'll notice that I added the spaces next to the "z" character.
a = a.replace(/z (.*?) z/, " Z$1Z ").toUpperCase();

console.log(a); // output: " ZTHIS IS OKZ "

它的作用是匹配“z”之间的所有内容，然后用紧邻的“Z”重写它。