如果字符串在开始或结束时包含空格，则节点 js Joi 验证发送错误

Question

How to create JOI validation with Node js if string contains empty space at start or end send error

example: if input is
name = "test123" //valid
name = "test(space)" or "(space)test" // invalid

Answer 1

You can use a regex pattern to check that string does not start or end with space.

Joi.string().pattern(new RegExp('^[^\s][^\s]+$', 'g'))

Answer 2

You can use below regex to validate the your cases

Joi.string().pattern(new RegExp('^([a-zA-Z0-9]+( [a-zA-Z0-9]+)*)$', 'g'))