I am getting regex string from json object (yes its dynamic and will be always be string) i want to test this with textbox value.
But even if i pass valid input text it does not pass regex condition
code :
var pattern = "/^[A-Za-z\s]+$/";
var str = "Some Name";
pattern = new RegExp(pattern);
if(pattern.test(str))
{
alert('valid');
}
else
{
alert('invalid');
}
Fiddle :- http://jsfiddle.net/wn9scv3m/
Two problems:
Corrected code:
var pattern = "^[A-Za-z\\s]+$";
var str = "Some Name";
pattern = new RegExp(pattern);
if(pattern.test(str))
{
alert('valid');
}
else
{
alert('invalid');
}
new RegExp. So for e.g. /[a-z]+/i you could pass new RegExp("[a-z]+", "i").Use regex-parser:
const parseRegex = require("regex-parser")
parseRegex("/^hi$/g")
// => /^hi$/g
This should work for you (jsfiddle: http://jsfiddle.net/wn9scv3m/9/):
var pattern = /^[(\w)|(\s)]+$/; // using / regex constructor...
var altPattern = "^[(\w)|(\s)]+$"; // using quotes and new RegEx() syntax...
var regex = new RegExp(altPattern);
var str = "Some Name";
if (str.match(pattern) != null && regex.test(str) != null) { // check using both methods
alert('valid');
}
else {
alert('invalid');
}
As far as I can see in https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions you are combining two methods to declare RegExp. If you are using the string variant, then don't include the "/" character before and after the expression, example:
var pattern = "^[A-Za-z\s]+$";
pattern = new RegExp(pattern);
If you like the /regexp/ form better, then use it without quotes:
pattern = /^[A-Za-z\s]+$/;
this should work
var str1 = "SomeName"; //true
var str2 = "SomeName123"; //false
function MyRegex(val) {
var pattern = /^[A-Za-z\s]+$/;
var match = pattern.exec(val);
return match !== null && match[0] === val;
}
alert(MyRegex(str1));
alert(MyRegex(str2));
var pattern = "/^[A-Za-z\s]+$/"; So there is no exec() function for strings.
Namehad a trailing space it would pass[]as()for some reason. See my answer for a working regex solution.