# WGLMakie slider issue
**URL:** https://discourse.julialang.org/t/wglmakie-slider-issue/85689
**Category:** General Usage
**Tags:** visualization
**Created:** [August 12, 2022, 10:46pm UTC](https://discourse.julialang.org/t/wglmakie-slider-issue/85689 "2022-08-12T22:46:52Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@AlexisRenchon](https://discourse.julialang.org/u/AlexisRenchon)
#### Post date: [August 12, 2022, 10:46pm UTC](https://discourse.julialang.org/t/wglmakie-slider-issue/85689/1 "2022-08-12T22:46:52Z")
I have 2 scripts that can be reproduced here:
> **[www.cupoftea.earth/functions/FLUXNET/Globe at master ·...](https://github.com/CUPofTEAproject/www.cupoftea.earth/tree/master/functions/FLUXNET/Globe)**
>
> master/functions/FLUXNET/Globe
they are the same script, but one in GLMakie, one in WGLMakie
The GLMakie script works as intended, but the WGLMakie slider is not responsive. I don’t know why, because if I run the lines inside the `on` `do`, they work.
Thank you for your help!
---
### Author:  [@AlexisRenchon](https://discourse.julialang.org/u/AlexisRenchon)
#### Post date: [August 14, 2022, 8:31pm UTC](https://discourse.julialang.org/t/wglmakie-slider-issue/85689/4 "2022-08-14T20:31:40Z")
Update:
I wrote 2 additional MWE scripts in the repo linked above, with sliders in GLMakie and WGLMakie, in 2D Axis.
They both work fine.
I cleaned the 3D LScene script, to make it clearly similar to the MWE. The issue seems to be due to 3D issues in WGLMakie / JSServe that seem to be currently being worked on. I get the following error message:
An exception was thrown in JS: RangeError: offset is out of bounds
Additional message: Error during running onjs callback
Callback:
([name, array, length]) =\> {
// TODO, why are these called with the initial values!?
if (length \> 0) {
const new\_values = deserialize\_three(JSServe.deserialize\_js(array));
const buffer = mesh.geometry.attributes[name];
let buffers;
let first\_buffer;
let real\_length;
let is\_instance = false;
// First, we need to figure out if this is an instance / geometry buffer
if (name in instance\_buffers) {
buffers = instance\_buffers;
first\_buffer = first\_instance\_buffer;
real\_length = real\_instance\_length;
is\_instance = true;
} else {
buffers = geometry\_buffers;
first\_buffer = first\_geometry\_buffer;
real\_length = real\_geometry\_length;
}
if (length \<= real\_length[0]) {
// this is simple - we can just update the values
buffer.set(new\_values);
buffer.needsUpdate = true;
if (is\_instance) {
mesh.geometry.instanceCount = length;
}
} else {
// resizing is a bit more complex
// first we directly overwrite the array - this
// won’t have any effect, but like this we can collect the
// newly sized arrays untill all of them have the same length
buffer.to\_update = new\_values;
if (
Object.values(buffers).every(
(x) =\>
x.to\_update &&