Is there a way to pass a variable into a regex in jQuery/Javascript?
I wanna do something like:
var variable_regex = "bar";
var some_string = "foobar";
some_string.match(/variable_regex/);
In Ruby you would be able to do:
some_string.match(/#{variable_regex}/)
Found a useful post:
Javascript doesn't support interpolation like Ruby -- you have to use the RegExp constructor:
var aString = "foobar";
var pattern = "bar";
var matches = aString.match(new RegExp(pattern));
new RegExp(pattern[, flags]) not just Regex
It's easy:
var variable_regex = "bar";
var some_string = "foobar";
some_string.match(variable_regex);
Just lose the //. If you want to use complex regexes, you can use string concatenation:
var variable_regex = "b.";
var some_string = "foobar";
alert (some_string.match("f.*"+variable_regex));
It's easy, you need to create a RegExp instance with a variable.
When I searched for the answer, I also wanted this string to being interpolated with regarding variable.
Try it out in a browser console:
const b = 'b';
const result = (new RegExp(`^a${b}c$`)).test('abc');
console.log(result);Another way to include a variable in a string is through string interpolation. In JavaScript, you can insert or interpolate variables in strings using model literals:
var name = "Jack";
var id = 123321;
console.log(`Hello, ${name} your id is ${id}.`);
Note: be careful not to confuse quotation marks or apostrophes for the serious accent (`).
You can use in function:
function myPhrase(name, id){
return `Hello, ${name} your id is ${id}.`;
}
