make * substitutions for the specified range of elements.
is there a better regular way to hide numbers?
writes how to handle a string. The demo is as follows:
//
hideCertificate(number) {
let a = "12345678";
let len = a.length;
let res;
res = `${a.substr(0, len / 2 / 2)}${new Array(Math.floor(len / 2)).fill("*").join("")}${a.substr(-(len / 2 / 2))}`;
console.log(res);
// 12****78
}, res = a.replace (/ ^ (\ d {2}) (. *?) (\ d {2}) $/, (match, p1, p2, p3) = > p1+p2.replace (/. / g, "*") + p3)
replace(/^((\d{2})\d+(\d{2}))$/, '$2****$3')let len=a.length
let reg=`\\d{${~~(len/4)}}`
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