Javascript select all HTML input fields with array style name

Question

I have a form that I am building and would like to have a javascript to select and manipulate all of the fields that are within the named array:

<input type="text" name="location[street]" value required />
<input type="text" name="location[city]" value required />
<input type="text" name="location[zip]" value required />
<input type="text" name="location[state]" value required />

How can I build a selector for javascript to toggle all of the elements disabled state?

Jquery is possible but not preferred. I would prefer a method that would work without libraries - such as document.getElementsByName().

DontVoteMeDown · Accepted Answer · 2014-08-13 18:04:24Z

2

I believe that querySelectorAll doesn't have support for a selector to get an element by an attribute, like jQuery would be input[name^="location"](docs). So, try this:

var els = document.querySelectorAll('input');

for (var i = 0; i < els.length; i++)
{
    if (els[i].name.indexOf("location") > -1)
    {
        els[i].disabled = true;
    }
}

Fiddle. I will be glad to hear that I'm wrong and there is a way for doing this only using a selector.

Anyway, you can use the fieldset and make your code more semantic by disabling only the fieldset, if you like: Fiddle.

UPDATE

In order to disable all textarea and select elements as well, just include those tags on the selector:

var els = document.querySelectorAll('input, textarea, select');

Fiddle

edited Aug 13, 2014 at 18:04

answered Aug 13, 2014 at 17:35

DontVoteMeDown

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5 Comments

Phil M Over a year ago

This works, however, it is not including any of the TEXTAREA or SELECT form elements (and this is my fault for not mentioning them in the question). If I am going to have to loop through all of the INPUT elements, I might as well just loop through all of the form elements and do the same comparison.

Phil M Over a year ago

Changed querySelectorAll() to document.getElementById('form_id').elements, so that non-input form types could be selected as well... but otherwise this answer is correct.

Phil M Over a year ago

Is using document.querySelectorAll('input, textarea, select') more efficient than using the form.elements?

DontVoteMeDown Over a year ago

Well, in this case I think form.elements should fit your needs to, but I really don't know which is better in this case. What you can do is set a class for all your elements starting with location in name tag, then you select them with .location-element. In this case querySelectorAll will make more sense.

RST Over a year ago

use a variable for the length so you are not calculating it over and over.

karthickj25 · Accepted Answer · 2014-08-13 17:47:13Z

1

Alternative to queryselector would be getElementsByTagName

var i;
var inputs = document.getElementsByTagName("input");

for (i = 0; i < inputs.length; ++i) {
 var name =  inputs[i].getAttribute("name");
    if(name.indexOf("location") > -1)
    {
    inputs[i].disabled = true;
        console.log(name);

    }
}

link to JSFIddle

answered Aug 13, 2014 at 17:47

karthickj25

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