jstree - stop single expanded node from collapsing

Using jstree is it possible to block the collapse of a single specific node?

I have a tree structure which can be expanded/collapsed at will... but I have certain nodes that should always be open and not allow the user to collapse them.

Is there a way to block the collapse (maybe through the data-jstree attribute on the <li>)... and if possible, a way to also remove the triangle against the item?

I've tried hooking into the close_node.jstree event but neither using a return false or e.preventDefault() is stopping it happening.

In the following example, I want the "Item 2 - Must Keep Open" to ALWAYS be open, and not allow the user to hide the "Always Visible" item...

$(function() 
 $("#treeRoot").jstree(
 core: 
 themes: 
 variant: "small"
 
 
 );
);

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <li data-jstree='"opened":true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

add a comment |

Using jstree is it possible to block the collapse of a single specific node?

I have a tree structure which can be expanded/collapsed at will... but I have certain nodes that should always be open and not allow the user to collapse them.

Is there a way to block the collapse (maybe through the data-jstree attribute on the <li>)... and if possible, a way to also remove the triangle against the item?

I've tried hooking into the close_node.jstree event but neither using a return false or e.preventDefault() is stopping it happening.

In the following example, I want the "Item 2 - Must Keep Open" to ALWAYS be open, and not allow the user to hide the "Always Visible" item...

$(function() 
 $("#treeRoot").jstree(
 core: 
 themes: 
 variant: "small"
 
 
 );
);

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <li data-jstree='"opened":true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

add a comment |

Using jstree is it possible to block the collapse of a single specific node?

I have a tree structure which can be expanded/collapsed at will... but I have certain nodes that should always be open and not allow the user to collapse them.

Is there a way to block the collapse (maybe through the data-jstree attribute on the <li>)... and if possible, a way to also remove the triangle against the item?

I've tried hooking into the close_node.jstree event but neither using a return false or e.preventDefault() is stopping it happening.

In the following example, I want the "Item 2 - Must Keep Open" to ALWAYS be open, and not allow the user to hide the "Always Visible" item...

$(function() 
 $("#treeRoot").jstree(
 core: 
 themes: 
 variant: "small"
 
 
 );
);

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <li data-jstree='"opened":true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

Using jstree is it possible to block the collapse of a single specific node?

I have a tree structure which can be expanded/collapsed at will... but I have certain nodes that should always be open and not allow the user to collapse them.

Is there a way to block the collapse (maybe through the data-jstree attribute on the <li>)... and if possible, a way to also remove the triangle against the item?

I've tried hooking into the close_node.jstree event but neither using a return false or e.preventDefault() is stopping it happening.

In the following example, I want the "Item 2 - Must Keep Open" to ALWAYS be open, and not allow the user to hide the "Always Visible" item...

$(function() 
 $("#treeRoot").jstree(
 core: 
 themes: 
 variant: "small"
 
 
 );
);

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <li data-jstree='"opened":true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

$(function() 
 $("#treeRoot").jstree(
 core: 
 themes: 
 variant: "small"
 
 
 );
);

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <li data-jstree='"opened":true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

$(function() 
 $("#treeRoot").jstree(
 core: 
 themes: 
 variant: "small"
 
 
 );
);

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <li data-jstree='"opened":true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

javascript jquery tree jstree

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

asked Nov 12 '18 at 16:01

freefaller

13.5k53867

add a comment |

1 Answer
1

active

oldest

votes

I couldn't find any option for preventing the closing of the node besides the option of overriding the close_node function of the jstree code.

Here is an example:

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

I didn't have the time to handle with the triangle, let me know if you have issues there, I'll try to find a solution for this one as well.

edited Nov 12 '18 at 17:25

answered Nov 12 '18 at 16:58

Dekel

43k54667

Thanks for your time Dekel... is your code supposed to stop the collapse, or demonstrate how to override the close functionality?

– freefaller
Nov 12 '18 at 17:05

both, actually :) try to click on the "root" element (to close it).

– Dekel
Nov 12 '18 at 17:06

Ah, that's something I hadn't tried... as it's the "Item 2 - Must keep open" that I'm trying to block the closure of. Every parent-node should act as normal

– freefaller
Nov 12 '18 at 17:07

Just add the "prevent_close": true where you need it... I changed the code to set the prevent_close on the second element. check it now.

– Dekel
Nov 12 '18 at 17:08

Interesting... many thanks for the idea. Never keen on overriding functionality, in case the underlying functionality changes in future updates. Will have a play and let you know how I get on. If you do figure out removing the triangle, please let me know

– freefaller
Nov 12 '18 at 17:09

|
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1 Answer
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1 Answer
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oldest

votes

I couldn't find any option for preventing the closing of the node besides the option of overriding the close_node function of the jstree code.

Here is an example:

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

I didn't have the time to handle with the triangle, let me know if you have issues there, I'll try to find a solution for this one as well.

edited Nov 12 '18 at 17:25

answered Nov 12 '18 at 16:58

Dekel

43k54667

Thanks for your time Dekel... is your code supposed to stop the collapse, or demonstrate how to override the close functionality?

– freefaller
Nov 12 '18 at 17:05

both, actually :) try to click on the "root" element (to close it).

– Dekel
Nov 12 '18 at 17:06

Ah, that's something I hadn't tried... as it's the "Item 2 - Must keep open" that I'm trying to block the closure of. Every parent-node should act as normal

– freefaller
Nov 12 '18 at 17:07

Just add the "prevent_close": true where you need it... I changed the code to set the prevent_close on the second element. check it now.

– Dekel
Nov 12 '18 at 17:08

Interesting... many thanks for the idea. Never keen on overriding functionality, in case the underlying functionality changes in future updates. Will have a play and let you know how I get on. If you do figure out removing the triangle, please let me know

– freefaller
Nov 12 '18 at 17:09

|
show 7 more comments

I couldn't find any option for preventing the closing of the node besides the option of overriding the close_node function of the jstree code.

Here is an example:

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

I didn't have the time to handle with the triangle, let me know if you have issues there, I'll try to find a solution for this one as well.

edited Nov 12 '18 at 17:25

answered Nov 12 '18 at 16:58

Dekel

43k54667

Thanks for your time Dekel... is your code supposed to stop the collapse, or demonstrate how to override the close functionality?

– freefaller
Nov 12 '18 at 17:05

both, actually :) try to click on the "root" element (to close it).

– Dekel
Nov 12 '18 at 17:06

Ah, that's something I hadn't tried... as it's the "Item 2 - Must keep open" that I'm trying to block the closure of. Every parent-node should act as normal

– freefaller
Nov 12 '18 at 17:07

Just add the "prevent_close": true where you need it... I changed the code to set the prevent_close on the second element. check it now.

– Dekel
Nov 12 '18 at 17:08

Interesting... many thanks for the idea. Never keen on overriding functionality, in case the underlying functionality changes in future updates. Will have a play and let you know how I get on. If you do figure out removing the triangle, please let me know

– freefaller
Nov 12 '18 at 17:09

|
show 7 more comments

I couldn't find any option for preventing the closing of the node besides the option of overriding the close_node function of the jstree code.

Here is an example:

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

I didn't have the time to handle with the triangle, let me know if you have issues there, I'll try to find a solution for this one as well.

edited Nov 12 '18 at 17:25

answered Nov 12 '18 at 16:58

Dekel

43k54667

I couldn't find any option for preventing the closing of the node besides the option of overriding the close_node function of the jstree code.

Here is an example:

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

I didn't have the time to handle with the triangle, let me know if you have issues there, I'll try to find a solution for this one as well.

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

$(function() 

 $.jstree.core.prototype.old_close_node = $.jstree.core.prototype.close_node;
 $.jstree.core.prototype.close_node = function(obj, animation) 
 node_obj = this.get_node(obj);
 // in case the flag exists - don't continue to with the original function.
 if (node_obj.state.prevent_close) 
 return;
 
 this.old_close_node(obj, animation);
 
 
 $("#treeRoot").on('loaded.jstree', function() 
 $('#treeRoot li').each((index, el) => 
 if ($(el).data('jstree') && $(el).data('jstree').prevent_close) 
 $(el).addClass('prevent-close');
 
 )
 ).jstree(
 core: 
 themes: 
 variant: "small"
 
 
 )
);

.jstree-default-small .jstree-open.prevent-close>.jstree-ocl 
 background-position: -71px -7px;

<link href="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/themes/default/style.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstree/3.2.1/jstree.min.js"></script>
<div id="treeRoot">
 <ul>
 <li data-jstree='"opened":true'>Root
 <ul>
 <li>Item 1</li>
 <!-- v-- this is the flag to prevent the close -->
 <li data-jstree='"opened":true, "prevent_close": true'>Item 2 - Must keep open
 <ul>
 <li>Always Visible</li>
 </ul>
 </li>
 <li>Item 3</li>
 </ul>
 </li>
 </ul>
</div>

edited Nov 12 '18 at 17:25

answered Nov 12 '18 at 16:58

Dekel

43k54667

edited Nov 12 '18 at 17:25

answered Nov 12 '18 at 16:58

Dekel

43k54667

answered Nov 12 '18 at 16:58

Dekel

43k54667

answered Nov 12 '18 at 16:58

Dekel

43k54667

Thanks for your time Dekel... is your code supposed to stop the collapse, or demonstrate how to override the close functionality?

– freefaller
Nov 12 '18 at 17:05

both, actually :) try to click on the "root" element (to close it).

– Dekel
Nov 12 '18 at 17:06

Ah, that's something I hadn't tried... as it's the "Item 2 - Must keep open" that I'm trying to block the closure of. Every parent-node should act as normal

– freefaller
Nov 12 '18 at 17:07

Just add the "prevent_close": true where you need it... I changed the code to set the prevent_close on the second element. check it now.

– Dekel
Nov 12 '18 at 17:08

Interesting... many thanks for the idea. Never keen on overriding functionality, in case the underlying functionality changes in future updates. Will have a play and let you know how I get on. If you do figure out removing the triangle, please let me know

– freefaller
Nov 12 '18 at 17:09

|
show 7 more comments

Thanks for your time Dekel... is your code supposed to stop the collapse, or demonstrate how to override the close functionality?

– freefaller
Nov 12 '18 at 17:05

both, actually :) try to click on the "root" element (to close it).

– Dekel
Nov 12 '18 at 17:06

Ah, that's something I hadn't tried... as it's the "Item 2 - Must keep open" that I'm trying to block the closure of. Every parent-node should act as normal

– freefaller
Nov 12 '18 at 17:07

Just add the "prevent_close": true where you need it... I changed the code to set the prevent_close on the second element. check it now.

– Dekel
Nov 12 '18 at 17:08

Interesting... many thanks for the idea. Never keen on overriding functionality, in case the underlying functionality changes in future updates. Will have a play and let you know how I get on. If you do figure out removing the triangle, please let me know

– freefaller
Nov 12 '18 at 17:09

Thanks for your time Dekel... is your code supposed to stop the collapse, or demonstrate how to override the close functionality?

– freefaller
Nov 12 '18 at 17:05

both, actually :) try to click on the "root" element (to close it).

– Dekel
Nov 12 '18 at 17:06

Ah, that's something I hadn't tried... as it's the "Item 2 - Must keep open" that I'm trying to block the closure of. Every parent-node should act as normal

– freefaller
Nov 12 '18 at 17:07

Just add the "prevent_close": true where you need it... I changed the code to set the prevent_close on the second element. check it now.

– Dekel
Nov 12 '18 at 17:08

Interesting... many thanks for the idea. Never keen on overriding functionality, in case the underlying functionality changes in future updates. Will have a play and let you know how I get on. If you do figure out removing the triangle, please let me know

– freefaller
Nov 12 '18 at 17:09

|
show 7 more comments

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