validate regex in javascript code example
Example 1: how to validate a string using regular expression in javascript
function validate(){
var phoneNumber = document.getElementById('phone-number').value;
var postalCode = document.getElementById('postal-code').value;
var phoneRGEX = /^[(]{0,1}[0-9]{3}[)]{0,1}[-\s\.]{0,1}[0-9]{3}[-\s\.]{0,1}[0-9]{4}$/;
var postalRGEX = /^[A-Z]{1,2}[0-9]{1,2} ?[0-9][A-Z]{2}$/i;
var phoneResult = phoneRGEX.test(phoneNumber);
var postalResult = postalRGEX.test(postalCode);
alert("phone:"+phoneResult + ", postal code: "+postalResult);
}
Example 2: javascript regex .test
const str = 'hello world!';
const result = /^hello/.test(str);
console.log(result);