I am trying to recreate a tabs component in React that someone gave me and I am getting stuck while getting the onClick method to identify the target.
These are the snippets of my code that I believe are relevant to the problem.
If I hardcode setState within the method, it sets it appropriately, so the onClick method is running, I am just unsure of how to set the tab I am clicking to be the thing I set the state to.
On my App page:
changeSelected = (event) => {
// event.preventDefault();
this.setState({
selected: event.target.value
})
console.log(event.target.value)
};
<Tabs tabs={this.state.tabs} selectedTab={this.state.selected}
selectTabHandler={() => this.changeSelected}/>
On my Tabs page:
{props.tabs.map(tab => {
return <Tab selectTabHandler={() => props.selectTabHandler()} selectedTab={props.selectedTab} tab={tab} />
})}
On my Tab page:
return (
<div
className={'tab active-tab'}
onClick={props.selectTabHandler(props.tab)}
>
{props.tab}
</div>
When I console.log(props.tab) or console.log(event.target.value) I am receiving "undefined"
There are a few issues causing this to happen. The first issue is that you wouldn't use event.target.value in the Content component because you aren't reacting to DOM click event directly from an onClick handler as you are in Tab, instead you are handling an event from child component. Also keep in mind that event.target.value would only be applicable to input or similar HTML elements that have a value property. An element such as <div> or a <span> would not have a value property.
The next issues are that you aren't passing the tab value from Tabs to Content and then from within Content to it's changeSelected() handler for selectTabHandler events.
In addition the onClick syntax in Tab, onClick={props.selectTabHandler(props.tab)} is not valid, you will not be able to execute the handler coming from props and pass the props.tab value. You could instead try something like onClick={() => props.selectTabHandler(props.tab)}.
Content - need to pass tab value coming from child to changeSelected():
render() {
return (
<div className="content-container">
<Tabs
tabs={this.state.tabs}
selectedTab={this.state.selected}
selectTabHandler={tab => this.changeSelected(tab)}
/>
<Cards cards={this.filterCards()} />
</div>
);
}
Tabs - need to pass tab coming from child to selectTabHandler():
const Tabs = props => {
return (
<div className="tabs">
<div className="topics">
<span className="title">TRENDING TOPICS:</span>
{props.tabs.map(tab => {
return (
<Tab
selectTabHandler={tab => props.selectTabHandler(tab)}
selectedTab={props.selectedTab}
tab={tab}
/>
);
})}
</div>
</div>
);
};
export default Tabs;
Also don't forget the unique key property when rendering an array/list of items:
<Tab
key={tab}
selectTabHandler={tab => props.selectTabHandler(tab)}
selectedTab={props.selectedTab}
tab={tab}
/>
Here is a forked CodeSandbox demonstrating the functionality.
Related
{data && data.map((data) => <Cards data={data} key={data._id} />)}
The code checks if there is data and of course if there is, it displays the card component.
I want to add a click event so I could know which of the list of cards retuned in particular is being clicked.
I've done this, it does not work.
{data && data.map((data) => <Cards onClick={click} data={data} key={data._id} />)}
and here is the click function
const click = (e) => {
e.preventDefault();
console.log("clicked");
};
You have a typo onClick and not onCLick
Edit:
You can wrap the <Card/> inside a <div> and add onClick to the div or inside the <Card/> component add onClick to the parent component and pass your click function as a prop
I have this codes in react:
const [categoryId, setCategoryId] = useState("");
{
catName.map((singleCategory, index) => {
const { catName, _id: categoryId } = singleCategory;
return (
<>
<div
className="category-single-div flex-3 center-flex-align-display"
key={index}
>
<p className="text-general-small2 category-custom-text">{catName}</p>
<div className="category-icons-div ">
<FaEdit
className="category-icon-edit"
onClick={() => {
setEditCategory(true);
setCategoryId(categoryId);
}}
/>
<AiFillDelete className="category-icon-edit category-icon-delete" />
</div>
</div>
</>
);
});
}
I used map to get an array of objects, and I needed their individual _id when a user clicks the edit button. I also want to call another function on the same edit button via onClick. It is working but displays an error.
Warning: Expected onClick listener to be a function, instead got a
value of string type.
I need that _id so as to pass it to a state and have access to it globally within the component at the top level.
Is this workable?
Your problem comes from the FaEdit component.
<FaEdit
id={categoryId}
className="category-icon-edit"
onClick={(editCategory, id) => { // you need to have onClick as a prop defined inside the FaEdit component
setEditCategory(editCategory);
setCategoryId(id);
}}
/>
Example...
export default function FaEdit({className, onClick, categoryId}){
const handleChange() => {
onClick(true, categoryId)
}
return(
<div className={className} onClick={() => handleChange()}>Click</div>
)
}
RenderImages = (): React.ReactElement => {
let selected = this.state.results.filter(x=>this.state.selectedGroups.includes(x.domain))
console.log(selected)
return(
<div className="results_wrapper">
{selected.map((r,i)=>{
let openState = (this.state.selectedImage==i)?true:false;
return(
<RenderPanel panelType={PanelType.large} openState={openState} title={r.domain+'.TheCommonVein.net'} preview={(openIt)=>(
<div className="result" onClick={openIt} style={{ boxShadow: theme.effects.elevation8}}>
<img src={r.url} />
</div>
)} content={(closeIt)=>(
<div className="panel_wrapper">
<div className="panel_content">{r.content}</div>
{this.RenderPostLink(r.domain,r.parent)}
<div onClick={()=>{
closeIt();
this.setState({selectedImage:2})
console.log('wtfff'+this.state.selectedImage)
}
}>Next</div>
<img src={r.url} />
</div>
)}/>
)
})}
</div>
)
}
When I change the state of 'selectedImage', I expect the variable 'openState' to render differently within my map() function. But it does not do anything.
Console.log shows that the state did successfully change.
And what is even stranger, is if I run "this.setState({selectedImage:2})" within componentsDidMount(), then everything renders exactly as expected.
Why is this not responding to my state change?
Update
I have tried setting openState in my component state variable, but this does not help either:
RenderImages = (): React.ReactElement => {
let selected = this.state.results.filter(x=>this.state.selectedGroups.includes(x.domain))
console.log(selected)
let html = selected.map((r,i)=>{
return(
<RenderPanel key={i} panelType={PanelType.large} openState={this.state.openState[i]} title={r.domain+'.TheCommonVein.net'} preview={(openIt)=>(
<div className="result" onClick={openIt} style={{ boxShadow: theme.effects.elevation8}}>
<img src={r.url} />
</div>
)} content={(closeIt)=>(
<div className="panel_wrapper">
<div className="panel_content">{r.content}</div>
{this.RenderPostLink(r.domain,r.parent)}
<div onClick={()=>{
closeIt();
let openState = this.state.openState.map(()=>false)
let index = i+1
openState[index] = true;
this.setState({openState:openState},()=>console.log(this.state.openState[i+1]))
}
}>Next</div>
<img src={r.url} />
</div>
)}/>
)
})
return(
<div className="results_wrapper">
{html}
</div>
)
}
https://codesandbox.io/s/ecstatic-bas-1v3p9?file=/src/Search.tsx
To test, just hit enter at the search box. Then click on 1 of 3 of the results. When you click 'Next', it should close the pane, and open the next one. That is what I'm trying to accomplish here.
#Spitz was on the right path with his answer, though didn't follow through to the full solution.
The issue you are having is that the panel's useBoolean doesn't update it's state based on the openState value passed down.
If you add the following code to panel.tsx, then everything will work as you described:
React.useEffect(()=>{
if(openState){
openPanel()
}else{
dismissPanel();
}
},[openState, openPanel,dismissPanel])
What this is doing is setting up an effect to synchronize the isOpen state in the RenderPanel with the openState that's passed as a prop to the RenderPanel. That way while the panel controls itself for the most part, if the parent changes the openState, it'll update.
Working sandbox
I believe it's because you set openState in your map function, after it has already run. I understand you think the function should rerender and then the loop will run once more, but I think you'll need to set openState in a function outside of render.
The problem is that even though you can access this.state from the component, which is a member of a class component, there's nothing that would make the component re-render. Making components inside other components is an anti-pattern and produces unexpected effects - as you've seen.
The solution here is to either move RenderImages into a separate component altogether and pass required data via props or context, or turn it into a normal function and call it as a function in the parent component's render().
The latter would mean instead of <RenderImages/>, you'd do this.RenderImages(). And also since it's not a component anymore but just a function that returns JSX, I'd probably rename it to renderImages.
I tire to look at it again and again, but couldn't wrap my head around why it wasn't working with any clean approach.
That being said, I was able to make it work with a "hack", that is to explicitly call openIt method for selectedImage after rendering is completed.
RenderImages = (): React.ReactElement => {
let selected = this.state.results.filter((x) =>
this.state.selectedGroups.includes(x.domain)
);
return (
<div className="results_wrapper">
{selected.map((r, i) => {
let openState = this.state.selectedImage === i ? true : false;
return (
<RenderPanel
key={i}
panelType={PanelType.medium}
openState={openState}
title={r.domain + ".TheCommonVein.net"}
preview={(openIt) => {
/* This is where I am making explicit call */
if (openState) {
setTimeout(() => openIt());
}
/* changes end */
return (
<div
className="result"
onClick={openIt}
style={{ boxShadow: theme.effects.elevation8 }}
>
<img src={r.url} />
</div>
);
}}
content={(closeIt) => (
<div className="panel_wrapper">
<div className="panel_content">{r.content}</div>
{this.RenderPostLink(r.domain, r.parent)}
<div
onClick={() => {
closeIt();
this.setState({
selectedImage: i + 1
});
}}
>
[Next>>]
</div>
<img src={r.url} />
</div>
)}
/>
);
})}
</div>
);
};
take a look at this codesandbox.
I am trying to list person by clicking onClick function to add empty object so that map can loop
over and show div. I see prop onclick function calling works but i map is not looping over it.
a little help would be appreciated.
// functional component
const listing = ({list=[]}) => (
<>
{
<div id='addPerson' onClick={() => list.push({})}>Add person</div>}
{list.map((element, index) => (
<div key={index} className='listItems'>
<p>list name</p>
</div>
))}
</>
);
export default listing;
// test case
it('renders list-items', () => {
const wrapper = shallow(<listing />);
wrapper.find('#addPerson').prop('onClick')();
console.log(wrapper.find('.listItems').length); // showing zero, expected 1
});
Updating List is not going to cause a re-render in your component. I am not sure where List is coming from, but I am assuming it is coming from a local state in the parent, or probably redux store. From inside your component, you will have to call a function in your parent to update the list array there.
Below is a version of your component, assuming the list in your local state. You will have to adjust the code to update the state in the parent or redux store, but the below should be enough to give you an idea of what to do. Also, don't push the element to array, as it mutates the object and will not contact re-render.
const Listing = ({list = [], addToList}) => {
return <>
{
<div id='addPerson' onClick={() => addToList({})}>Add person</div>}
{list.map((element, index) => (
<div key={index} className='listItems'>
<p>list name</p>
</div>
))}
</>
};
I have a React app with modal, that pop-ups with rules of the game when one clicks a button. What I want to do is make it so when I click anywhere outside this pop up window it will close. i have three files. app.js, dialog.js, and outsidealerter.js . In my main app.js when I click a button it sets a state to visible, so my element takes it and renders based upon it. my outsideralerer.js basicly detects if there is a click outside anything wrapped with specific tags. Now the problem comes that i have a method that changes the state of visibility in app.js, so in order for outsderalerter.js to use it, I pass it to it so it can have access to my main state and change it so that when a click is outside the zone the pop up window disappears. Kind of works except it closes it down even if i click within a pop up window, because when i pass the value to outsidealerter it considers the whole body as a no click zone. My question is how can I prevent it from triggering and just pass it a value, or is it possible to change the state value of app.js from outsidealerter.js
App.js
updateState() {
this.setState({ isOpen: false });
}
<div id='rule-button'>
<button onClick={(e)=>this.setState({isOpen : true})} id="modalBtn" class="button">Open Rules</button>
</div>
<OutsideAlerter updateParent={ this.updateState.bind(this)}/>
<Dialog isOpen={this.state.isOpen} onClose={(e)=>this.setState({isOpen : false})}>
</Dialog>
outsidealerter.js
handleClickOutside(event) {
if (this.wrapperRef && !this.wrapperRef.contains(event.target)) {
//alert('You clicked outside of me!');
{this.props.updateParent()};
}
}
I think it will be simpler to have the modal take the full space of the window height and width and just make it invisible except for the content of what you want to show.
We can wrap the modal with onClick={hideModal} and wrap the inner content with onClick={e => e.stopPropagation()} which will prevent our wrapper for triggering the hideModal handler.
class ModalWrapper extends React.Component {
state = { isModalOpen: true };
toggleModal = () => {
this.setState(({ isModalOpen }) => ({
isModalOpen: !isModalOpen
}));
};
render() {
const { isModalOpen } = this.state;
return (
<div className="App">
<button onClick={this.toggleModal}>Open Modal</button>
{isModalOpen && <Modal hideModal={this.toggleModal} />}
</div>
);
}
}
function Modal({ hideModal }) {
return (
<div onClick={hideModal} className="modal">
<div onClick={e => e.stopPropagation()} className="modal__content">
Modal content
</div>
</div>
);
}
Working example