Select2 not calculating `resolved` width correctly if select is hidden

Question

I am using Twitter bootstrap and the fantastic Select2 plugin.

These are working great, I realized you need to set {width: 'resolve'} when initiating Select2 otherwise it looks messed up!.

But I am having an issue with one of my selects, as you can see in the image below, the Referee Type select has an incorrect width.

This is caused due to this field being initially hidden, and only becoming visible if Referee is selected in the Group field.

So, how can I fix this?

Solution 1

Select 2 is smart enough to recalculate it's size if only you set it in the select tag. Like so:

<select style="width: 100%"></select>

CSS formatting on classes would not work!

Read more in "Responsive design - Percent width"

Solution 2

You can set the width in the <select> element like so:

<select style="width:260px">

Until you find the desired width that you're looking for. In fact, the examples on the official select2 plugin site are done in this way.

However, if you're intent upon staying away from inline styles, you can always simply override select2's CSS and target the resulting container.

.select2-container {
  width: 260px;
}

Solution 3

I solved my similar problem with simple CSS:

.select2-container {
    width: 100% !important;
}

Solution 4

Instead of invoking select2() on the Referee Type when the page loads, invoke select2 after showing Referee Type for the first time. This way, the select will be visible (with a proper width), and the 'width': 'resolve' option should work. If you provide a small jsfiddle example it would be easier to point this out.

Solution 5

Set the style property of select element with width 100%

<select class="js-example-responsive" style="width: 100%"></select>

See Responsive design - Percent width

View more solutions

Comments

[RyanFishman]

Can you please provide a jsfiddle this way we can take a look at your problem?

[charlietfl]

one option is wait until element shown to initialize plugin, another is don't hide select but place it offscreen until needed. Demo would help

[Fabrício Matté]

I've been using select2 for a while and I usually set the width inline in the element style in the HTML - I know it is not very good practice but Select2 will attempt to copy the element style's width prior to resolving its actual dimensions so it is worth a shot. In that case you can remove width: 'resolve'.

[surendran]

try adding inline width with "!important".

[Cesar Bielich]

omg this was driving me crazy, ugh the simplest things are always overlooked. Thanks for your answer.

[Jean-Luc Barat]

Does the tricks for ajax render (without quote for width). Thanks.

[Ceasar Bautista]

There's an open issue to fix this here, though at present no patch or response from the maintainer: github.com/select2/select2/issues/4513

[user3620741]

$('select').select2({ width: 'auto' });

[danielricecodes]

This is by far the best answer. Easiest to implement also.

[ni8mr]

It works for all cases (if element is hidden within a hidden parent and also if the element itself is hidden). No need to check any external cases.

[Harry Bosh]

This interferes with other select boxes negativley in my instance

[DomQ]

In addition to saying that this is the only correct answer, I feel like adding that the behavior is different between Firefox and Chrome for some reason. Kudos anyway!

[Yevgeniy Afanasyev]

You are very welcome. Did you notice any difference between Firefox and Chrome?

[Max Cuttins]

THIS IS THE RIGHT ANSWER! :) My Select2 was working properly till I don't move to a hidden TAB. From that point width of Select2 was reduced to the selected value. This is just a BUG, the workaround is to display:block/declare Select2 /display:none during page ready.

[Nguyen Tan Dat]

This definitely works, but may I know what makes this issue?

[Mischa]

This works for the select, but not for the placeholder inside. If there is a long placeholder, it gets cut off

[Raiika]

in my case, this causes me a vertical scroll because the span is not in the very left of the monitor and it's taking 100% of the <body> width which causes an overflow width –