regex - Matching non-numbers after a few characters with javascript -

i'm new regexes , i'm validating form. want use string.prototype.match filter out array responses incorrect. input should match form:

"foo-1234567" 

where each identifier starts foo- , has 7 digits. if there's more 1 identifier, input takes form:

"foo-1234567\nfoo-7654321\nfoo-1324536"` 

where identifiers separated linefeeds.

i want match give me each identifier has foo- , 7 characters 1 or more non-digit characters. if input this:

"foo-1234567\nfoo-1234a67\nfoo-123$5^7" 

i want array match this: ["foo-1234a67", "foo-123$5^7"].

regexes have tried:

/^foo-\d+$/gmi   //nada /^foo-(\d){1,7}$/gmi    //not close /^foo-\d*\d+\d*$/gmi    //good matches > or < 7 characters /^foo-(?=^foo-\d*\d+\d*$)(?=pr-.{7})/gmi    //empty string or null 

as always, code-golf, shortest code wins.

the regex match individual valid values simple: /^foo-\d{7}$/. i'd suggesting .split()ing on newlines , .filter()ing throw away values don't match regex:

let getinvalid = input => input.split("\n").filter(v => !/^foo-\d{7}$/.test(v))    // following has valid, outputs empty array:  console.log( getinvalid("foo-1234567\nfoo-7654321\nfoo-1324536") )  // following has invalid, outputs them:  console.log( getinvalid("foo-1234567\nfoo-1234a67\nxyz-1234567\nfoo-123$5^7") )  // works when there 1 value:  console.log( getinvalid("foo-1234567") )  // following has invalid, outputs them:  console.log( getinvalid("foo-123$5^7") )

edit: after spencer's prompting i've realised question asked match invalid values start "foo-" , right length. i.e., "foo-123$5^7" in desired output, "foo-123" , "xyz-1234567" not in output though they're invalid values. if that's case can use regex negative lookahead exclude values 7 digits:

/^foo-(?!\d{7}).{7}$/ 

in context:

let getinvalid = input => input.match(/^foo-(?!\d{7}).{7}$/gmi)    console.log( getinvalid("foo-1234567\nfoo-1234a67\nfoo-123") )  console.log( getinvalid("foo-1234567\nfoo-11111117\nfoo-1239999") )  console.log( getinvalid("foo-12##567\nxyz-1234a67\nfoo-123$5^7") )