regex for uppercase js code example

Example 1: regex only uppercase letters js

if (value.match(/^[A-Z]*$/)) {
    // matches
} else {
    // doesn't match
}

Example 2: how to check string uppercase or lowersace using regex javascript

var regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!#\*\?])(?=.{8,})/;