javascript - Java Script Regular expression for number format not working -



javascript - Java Script Regular expression for number format not working -

i want input user 888-999-6666..i.e. 3 numbers '-' 3 numbers 1 time again '-' , 4 numbers. using next regular look in javascript.

var num1=/^[0-9]{3}+-[0-9]{3}+-[0-9]{3}$/; if(!(form.num.value.match(num1))) { alert("number cannot left empty"); homecoming false; }

but not working. if utilize var num1=/^[0-9]+-[0-9]+-[0-9]$/; wants @ to the lowest degree 2 '-' no restriction on numbers.

how can re requirement? , why above code not working?

remove + symbol nowadays after repetition quantifier {} . , replace [0-9]{3} @ lastly [0-9]{4}, allow 4 digits after lastly - symbol.

var num1=/^[0-9]{3}-[0-9]{3}-[0-9]{4}$/;

demo

you write [0-9] \d.

javascript regex

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