I created some sp-picker, but I can’t find why it not respond onChange.
Maybe I do it something wrong, but it not even log onChange.
I need to set value of textfield based on picker chose.
Also I tried with addEventListener but I got error during debugging that "Cannot read properties of null (reading ‘addEventListener’)…
Please help
const Home = () => {
var officeArray =["Office 1", "Office 2", "Office 3"]
// document.querySelector("#emp").addEventListener("change",console.log("selected new") )
function officeHandler() {
console.log("selected new")
document.querySelector("#emp").value = "Marko"
}
return(
<>
<div className="toolName">Home</div>
<div className="board">
<sp-label>Office:</sp-label>
<sp-picker id="office" size="m" placeholder="Select office" onChange={()=>officeHandler()}>
<sp-menu>
{
officeArray.map((e,index) => {
return(
<sp-menu-item key={index} size="m">{e}</sp-menu-item>
)
})
}
</sp-menu>
</sp-picker>
<sp-label>Employee:</sp-label>
<sp-textfield id="emp" size="m"></sp-textfield>
</div>
</>
)
}
export default Home;
Hey man, had a similar issue when building a previous plugin. I was having issues getting the value from the slider when it was updated. This worked for me:
const slider = document.querySelector(‘sp-slider’);
const endListener = ({ target }) => {
target.addEventListener(‘input’, startListener);
target.removeEventListener(‘input’, streamListener);
target.removeEventListener(‘change’, endListener);
console.log(target.value);
globalThis.scaleSetting = slider.value;
};
const streamListener = ({ target }) => {
};
const startListener = ({ target }) => {
target.removeEventListener(‘input’, startListener);
target.addEventListener(‘input’, streamListener);
target.addEventListener(‘change’, endListener);
};
slider.addEventListener(‘input’, startListener);
console.log(slider.value);
…
Hopefully replacing the slider object with your picker object might work
1 Like
You need some Wrapper Component. Example and some explaining can be found in this topic, but I ended up using wc-react
import {wrapWc} from "wc-react";
export default () => {
const SpCheckbox = wrapWc("sp-checkbox")
return (
<SpCheckbox
onChange={(e) => func()}
>Checkbox</SpCheckbox>
)
}
Same with sp-picker
1 Like
Thank you guys. Second one works great. 
@Karmalakas could you please help, how to resolve previous situation in case that fields use data from json? For example I make this json about office’s and I need to change values of textfileds based on selection value. I make this solution with for/if block, but I am sure that there is a better way, but I don’t know how. Thanks in advance
/// data.json
[
{
"office":"Management",
"responsable":"Marko",
"seats":"1"
},
{
"office":"Design",
"responsable":"Alex",
"seats":"10"
}
]
/// home.jsx
import {wrapWc} from "wc-react";
import data from "../components/data.json"
const Home = () => {
const SpPicker = wrapWc("sp-picker")
function officeHandler() {
for(var i=0; i<=data.length; i++){
if( data[i].office === document.querySelector("#office").value){
document.querySelector("#responsable").setAttribute("value",data[i].responsable)
document.querySelector("#seats").setAttribute("value",data[i].seats)
}
}
}
return(
<>
<div className="toolName">Home</div>
<div className="board">
<sp-label>Office:</sp-label>
<SpPicker id="office" size="m" placeholder="Select office" onChange={()=>officeHandler()}>
<sp-menu>
{
data.map((e,index) => {
return(
<sp-menu-item key={index} size="m">{e.office}</sp-menu-item>
)
})
}
</sp-menu>
</SpPicker>
<sp-label>Responsable:</sp-label>
<sp-textfield id="responsable" size="m"></sp-textfield>
<sp-label>Seats:</sp-label>
<sp-textfield id="seats" size="m"></sp-textfield>
</div>
</>
)
}
export default Home;
You can check starter plugin how state is used there for each color. In your case it probably would be something like:
import { useState } from "react";
import {wrapWc} from "wc-react";
import data from "../components/data.json"
const Home = () => {
const SpPicker = wrapWc("sp-picker")
const [office, setOffice] = useState({});
return(
<>
<div className="toolName">Home</div>
<div className="board">
<sp-label>Office:</sp-label>
<SpPicker size="m" placeholder="Select office" onChange={(evt) => setOffice(data[evt.target.value])}>
<sp-menu>
{
data.map((e,index) => {
return(
<sp-menu-item key={index} size="m" value={index}>{e.office}</sp-menu-item>
)
})
}
</sp-menu>
</SpPicker>
<sp-label>Responsable:</sp-label>
<sp-textfield size="m" value={office.responsable || ""}></sp-textfield>
<sp-label>Seats:</sp-label>
<sp-textfield size="m" value={office.seats || ""}></sp-textfield>
</div>
</>
)
}
export default Home;
Keep in mind, that I didn’t test this and wrote directly here in the forum reply box 
So it might be wrong in some syntax or something, but the basic idea should be clear
1 Like
Thanks, It works perfectly. Now I understand how to use usestate properly 
1 Like
