复制代码 代码如下:
var s = "ABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890";
function f(s, width){
return s.replace(
new RegExp("[\s\S]{1,"+(width || 4)+"}", "g"),
function(m){
return "^" + new Array(m.length).join(" ");
});
}
console.log(s);
console.log(f(s, 4));
console.log(f(s, 8));