拆分长字符串成多行正则表达式错误

Question

我尝试将长字符串分割成多行输出的反应：

let text ='fooooooooooooooooooooooooooooooooooooooooooooooooooo'
let rowEnd=10;
let regxp = new RegExp(rowEnd, "g");
let lines = text.match(regxp);
text = lines.join("\n");
console.log(text);

但收到的错误：类型错误：无法读取属性空的“加入”。

我究竟做错了什么？

Answer 1

您需要使用正确的RegExp这是/.{10}/g

let text = "fooooooooooooooooooooooooooooooooooooooooooooooooooo";
let rowEnd = 10;
let regxp = new RegExp(`.{${rowEnd}}`, "g");
let lines = text.match(regxp);
text = lines.join("\n");
console.log(text);

Answer 2

另一种方法是使用replace方法，就像这样：

let text ='0123456789abcsdbgdjb9876543210pol' ,
    rowEnd = 10 ,
    patt = new RegExp('.{' + rowEnd + '}','g') ;

console.log( text.replace(patt,'$&\n') ) ;