[1]: Description: ID card desensitization processing: /^(.{6})(?:\d+)(.{4})$/, display the first 6 and last 4, and hide the date of birth
const idCard = "110108199001010101" // 身份证号
const reg = /^(.{6})(?:\d+)(.{4})$/ // 匹配身份证号前6位和后4位的正则表达式
const maskedIdCard = idCard.replace(reg, '\$1******\$2') // 身份证号脱敏，将中间8位替换为“*”
console.log(maskedIdCard); // 输出：110108******0101[2]: Description:
In the above code, an ID number variable idCard is first defined , and then a regular expression reg is defined , which matches the first 6 digits and the last 4 digits of the ID number, and uses brackets to separate the first 6 digits and The last 4 bits are grouped separately.
Next, use the replace method to replace the middle 8 digits of the ID number with 8 asterisks. The replacement method is to use $1 to represent the first matched group (that is, the first 6 digits), and use ***** * represents 8 asterisks, use $2 to represent the second matched group (that is, the last 4 digits).
[3]: /^(.{6})(?:\d+)(.{4})$/ This regular expression can be interpreted as:
/^ matches the beginning of the string
(.{6}) matches 6 arbitrary characters and captures them as the first capturing group
(?:\d+) matches one or more digits without capturing them
(.{4}) matches 4 arbitrary characters and captures them as the second capturing group
$/ matches the end of the string