react.js | javascript library for building user interfaces | Frontend Framework library
kandi X-RAY | react.js Summary
kandi X-RAY | react.js Summary
A javascript library for building user interfaces which is developed by Facebook. It's used for handling view layer for web and mobile apps. ReactJS allows us to create reusable UI by bundling HTML and Javascript, called components.
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Trending Discussions on react.js
QUESTION
I have my own API wrote in Play Scala and frontend client wrote in react.js I can't send logout request (I use OAuth2), because i get error with cors headers. I tried to fix it but i can't.
My react fetch method:
...ANSWER
Answered 2021-Jun-15 at 14:43allowedOrigins = ["http://localhost:3000"]
should coresponds with your frontend app.Check all routes.
BTW: If it's a public API you can turn off this filter.
QUESTION
I'm creating 2 pages (Summary and Cycles pages) using react.js
.
On the Summary page, there is a column named CN
that every item links to the Cycles page.
Summary page has a path /route/summary/location=abc
and Cycles page has a path /route/cycle/location=abc/deviceId=4410
For example, if I click the value from CN
column in the first row of the table inside the Summary page, I will be redirected to the Cycles page with the path /route/cycle/location=abc/deviceId=4410
.
In the Summary page, I use https://github.com/react-bootstrap-table/react-bootstrap-table2 for the table component and I use a columnRenderer
function inside columns.js
to render a custom item inside the table like this one:
How can I put the pathname
(example "abc") to a Link component inside cnColumnRenderer
function in columns.js
?
Summary page with the path: /route/summary/location=abc
Cycles page with the path: /route/cycle/location=abc/deviceId=4410
Error because of invalid hook call while rendering the Summary page
My Code:table code inside Summary page (inside Summary.js):
hint: focus on columns
variable from './columns' and its implementation
ANSWER
Answered 2021-Jun-15 at 05:17React hooks are only valid in React functional components, not in any callbacks, loops, conditional blocks. If you need the location data in the callback it needs to be passed in.
From what I can tell it seems you need to move the columns.js
code into the main component so the location
values can be closed over in scope.
QUESTION
I want to make a confirmation before user leaving the page. If he says ok then it would redirect to new page or cancel to leave.
but issue is that when user refresh page using browser refresh btn in google chrome that time below error occur
I tired this code but doesn't work in react.js please help
...ANSWER
Answered 2021-Mar-10 at 07:31you can also use that
winodow.location.reload(true)
winodow.location.reload(false)
QUESTION
Following the below approach to show Bootstrap 5 Toast dynamically on click of a button in React.js
import statement:
...ANSWER
Answered 2021-Jun-14 at 11:49You can use the useRef
and useEffect
React hooks...
QUESTION
react.js
...ANSWER
Answered 2021-Jun-13 at 18:06Use input[type="checkbox"]:checked
. This selects checkboxes that are checked.
Here's how to use it:
If the snippet is unavailable, use this JSFiddle link.
QUESTION
I'm having a list of content="[...]" variables (str). That variable must match at least one of each value in these lists (case insensitive). Do you have advice on how to achieve that best?
react_terms = ["reactjs", "react.js", "react"] (OR condition)
AND
python_terms = ["python", "django"] (OR condition)
AND
cities_countries = ["london", "UK"] (OR condition)
What I'm trying (not working)
...ANSWER
Answered 2021-Jun-13 at 16:19If you want content_str
to match exactly any of the items in the three lists, you could use:
QUESTION
i am working on a project with a react.js FE, a Node/Express.js BE and a database. I am currently working on a function which trigger my delete Route in BE. But my function trigger with every load and onlick, but should only trigger onClick.
Here are code samples of my service and my FE component. I am new to react.js so help would be apprechiated.
hardwareService.js:
...ANSWER
Answered 2021-Jun-11 at 15:51Replace this line:
QUESTION
I'm working on a simple order list web app using react hooks,
I have an orders
state and when the user clicks on a product image in the shopping panel a new object adds to the orders
array with quantity property
ANSWER
Answered 2021-Jun-11 at 08:32It's easier to work with an object (dictionary) instead of an array, when you need to update items.
Changing order
to object, check if the product._id
exists on the object. If not, add the item to the object using the product._id
as the key. If it does, recreate the object at the product._id
, and increment the previous quantity.
Use Object.values()
to convert the object to an array, when you wish to render it.
QUESTION
I have the array of objects which contain components and title now I would like to display these components based on id passed in URL parameters I can do that if its just array using find function, unfortunately, I can't figure how to do the same with an array of objects,
Here is part of my code
...ANSWER
Answered 2021-Jun-10 at 01:03The value of SelectedComponent
will be an object with title
and component
properties. You need to render just the component, and maybe pass in the title
property if you wish.
QUESTION
I just started using React.js and I have some questions. I want to make a page for a quiz test for the app that I am working on. On this page, the user should provide info about the quiz, including the number of questions. On entering the number of questions an equal number of input fields should then also be displayed. Can someone help me, please?
...ANSWER
Answered 2021-Jun-07 at 19:47I have recreated the logic that you have asked for.
Stackblitz - Click this link to see the output.
This is just a gist you can expand the code by handling errors also. That'll good for your learning.
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