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i have two component, component A check Internet access and change connection state.
Component A
now i want pass "connection" state to B component and setstate there with a
a new state...
Component B
now
Since network state is used throughout the app, it's better to warp it at the root level.
And use Context to pass the props.
Here NetworkStatusContext is used to pass network state to child components.
<NetworkStatusContext.Provider value={isConnected}>
<App />
</NetworkStatusContext.Provider>
Then you can get the network state at any component.
<NetworkStatusContext.Consumer>
{isConnected =>
(!isConnected ? <ErrorMessageComponent/>: <SomeComponent/>
)}
</NetworkStatusContext.Consumer>
For above question!
Passing props from Component A -> B
render(){
return(
<ComponentB
connection={this.state.connection}
/>
);
}
In component B you can access props as:
render(){
const{connection}=this.props;
.....
Related
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I am using vue3-sfc-loader. I can get it working, but I am unable to use other components (also loaded from the same plugin) inside of a component. I have gone through documentation and searched whole day, but I am not able to figure out what am I missing.
I found the answer. Answering for anyone needing it.
You can use import statement with relative path to your another component inside script tag of your SFC.
Also, you need to include the component in list of components you want to use.
import currency from './currency.vue';
export default ({
props: {
...
},
components: {
'currency': currency
},
setup() {
},
...
Although someone in discussions on githhub mentions that you can use import statements.. it doesn't work.
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I have created a component called dynamicTable which accepts a config as a prop
so on my sample.vue file which is the parent
<template>
<div>
<dynamicTable :config="config"></dynamicTable>
<el-dialog title="modal" :visible.sync="modal">
<dynamicTable :config="modal_config"></dynamicTable>
</el-dialog>
</div>
</template>
so the problem here is the dynamicTable that is not in the modal gets the configuration of the dynamicTable on the modal.
what i want is that each dynamic table has its own cofiguration without affecting the other
Your problem is probably not a general component prop problem.
This should run OK for any prop inside any custom-component:
<template>
<div>
<custom-component prop="A"></custom-component>
<el-dialog :visible.sync="modal">
<custom-component prop="B"></custom-component>
</el-dialog>
</div>
</template>
So my guess is that your problem is on creating / updating config and modal_config.
My personal favorite way to check data values in real-time is by using Vue.js dev tools for Chrome or Firefox.
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I using Vue3 and firestore
Here's my problem.
<textarea class="form-control v-model="form.comment" #keypress.enter="saveComment" required></textarea>
<button #click="saveComment">save</button>
#keypress.enter="saveComment" is works
but
#click="saveComment" did not work.
I don't know what's the difference between these two.
I used saveComment in the methods: {} in the script.
edited
When I ran the function through #keypress.enter, the page was not refreshed
But when I ran the function through #click, the page was refreshed and the function was not executed.
So I added a prevent.submit and it works well.
Considering the fact that you only shared little information on your question, I would be answering based on some assumptions.
The keypress event is an event emitted when a key that emits is character is pressed (this event is already deprecated according to MDN, so you might want to consider keyup/letdown event).
However, you should note that the #keypress.enter event according to Vuejs would only be emitted when an individual clicks on the enter Key.
#click event on the other hand would be emitted when a click event is observed on such element, in this case a button.
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I am new to react-native, I have created createMaterialTopTabNavigation -- i.e, Login & Signup.
In my LoginScreen there is another screen ForgotPassword IDK how can I navigate to ForgotPassword screen from LoginScreen while I have only created one navigation i.e, CreateMaterialTopTabNavigation
You can use createStackNavigator as main navigation and createMaterialTopTabNavigation as first config that will execute.
try this,
...//your old navigators
const stack = createStackNavigator({
tab:AppTabNavigator,
forgotPassword:...// your forgot password screen
})
and then if you're using react-navigation#3.x then you need to wrap this stack in appContainer and export it.
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i have created 3 pages, first page is navigating to second page and second page is navigating to 3rd page, how ever when i click back button it is navigating to previous page but its not giving last history intead of its reloading the page,
This is normal as the previous component's instance is destroyed. You can console.log in each lifecycle hook to see which hooks are called when a route is entered and exited.
To prevent this behaviour and cache your route's component you can wrap the <router-view> inside <keep-alive>
<keep-alive>
<router-view></router-view>
</keep-alive>
You can even pass include and exclude props on <keep-alive> to manage which component to or not be cached