In accordion I cannot set all items to be closed by default.

[algsupport]

What steps will reproduce the problem?

Create an accordion widget with any number of groups.

What's expected?

All accordion groups to be closed by default.

What do you get instead?

First group is always rendered showing not matter what options I set.

Additional info

Q	A
Yii vesion	Latest
PHP version	8.0
Operating system	Windows 10

Hi everyone,

I am trying to created an accordion widget that by default has all it's groups not showing, but instead the first group is always showing by default.

I tried reading the source code from accordion.php it seems that the BC fix is enforcing this behavior without any option to configure it.

Did I miss anything?
Appreciate your input.
Regards

[simialbi]

What about setting

[
    'items' => [
        [
            // [...],
            'expand' => false
        ]
    ]
]

[algsupport]

@simialbi thank you for your response. I believe I have tried it.
I will check again and update you, but I would like to get your attention to these lines of code:

yii2-bootstrap4/src/Accordion.php

Lines 138 to 146 in a0280a6

	$expanded = array_search(true, ArrayHelper::getColumn(ArrayHelper::toArray($this->items), 'expand', true));
	foreach ($this->items as $key => $item) {
	if (!is_array($item)) {
	$item = ['content' => $item];
	}
	// BC compatibility: expand first item if none is expanded
	if ($expanded === false && $index === 0) {
	$item['expand'] = true;
	}

If I am not mistaken, it means that if none of the items have expand set to true, then set expand to true for the first item/group.
Please correct me if I am wrong.

Thank you for your time
Regards

PS. I have already fixed the issue in my code. I just extended the class and overridden the function and it works for me.

[simialbi]

@algsupport you're right, it's done because of compatibility with yii\bootstrap\Collapse

[algsupport]

@simialbi I got that. But I think there should be a way to explicitly disable that behavior.

Regards