javascript syntax error: invalid regular expression

Question

I am writing an application in javascript. In my application there is an option to search for a string/regex. The problem is match returns javascript error if user types wro

Answer 1

Use a try-catch statement:

function myFunction() {
    var filter = $("#text_id").val();
    var query = "select * from table";
    try {
        var regex = new RegExp(filter);
    } catch(e) {
        alert(e);
        return false;
    }
    var found = regex.test(query);
}