check the value of a textbox that whether it contains a particular set of strings or not

Question

I want to check the value of a textbox that whether it contains a particular set of strings or not. How do I do this? (preferably using jquery)

I have a textbox where a user enters something. I want to check whether the string he enters contains BOTH "@" and "port". Please help..

I tried using contains but it is giving false positives.

Here is the code I used.

if($("#id:contains('@'):contains('port')")) {
    $("#1st").hide();
    $("#2nd").show();
} else {
    alert("Wrong value entered.");
}

score 2 · Accepted Answer · answered Jul 30 '12 at 07:23

2

Use $('#id').val() to get the value. Then you can use regular JavaScript functions to check if it contains certain values.

var value = $('#id').val();
if(~value.indexOf('@') && ~value.indexOf('port')) {
    $("#1st").hide();
    $("#2nd").show();
} else {
    alert("Wrong value entered.");
}

In case you wonder what the ~ does: it's a smart way to check for != -1 as ~-1 == 0.

answered Jul 30 '12 at 07:23

ThiefMaster

310,957
84
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636

thnx. this works good. was wondering if there was any way to do this using pure jquery. – Kaustubh Jul 30 '12 at 07:37

score 1 · Answer 2 · answered Aug 07 '13 at 10:38

Here is basic solution with other example which is very simple and won't need any other file to be imported.

function check()

{

    var val = frm1.uname.value;
    //alert(val);
    if (val.indexOf("@") > 0)
    {
        alert ("email");
        document.getElementById('isEmail1').value = true;
    }else {
        alert("usernam");
          document.getElementById('isEmail1').value = false;
    }
}

score -1 · Answer 3 · answered Jul 30 '12 at 07:25

-1

Try a combination of javascript and jQuery

var txtVal = $("#id").attr('value');
if(txtVal.indexOf("@")!= -1 && txtVal.indexOf("port")!= -1)
   alert('yes');
else
   alert('no');

answered Jul 30 '12 at 07:25

afrin216

2,295
1
14
17

`.attr('value')` is **bad**. Use `.val()` instead! – ThiefMaster Jul 30 '12 at 07:27
CrossBrowser compatibility issues are there for .val(). Sometimes it doesn't work for all the DOM elements in all browsers – afrin216 Jul 30 '12 at 07:28
I **highly** doubt that. jQuery functions are cross-browser-compatible. Probably it's your code that's broken if it doesn't work for you. The only reason `.attr('value')` currently works is that jQuery has an internal fallback to the *property*. However, this will be removed in a future version and then it **will** break: http://jsfiddle.net/YRNfC/ – ThiefMaster Jul 30 '12 at 07:31
@ThiefMaster I experimented a lot now and found .val() to be the more stable and consistent method. Thanks for the tip up. – afrin216 Jul 30 '12 at 08:57

check the value of a textbox that whether it contains a particular set of strings or not

3 Answers3

Here is basic solution with other example which is very simple and won't need any other file to be imported.