molecule-dev / molecule Goto Github PK
View Code? Open in Web Editor NEWEvery public app assembled using Molecule.dev.
Home Page: https://assemble.molecule.dev
Every public app assembled using Molecule.dev.
Home Page: https://assemble.molecule.dev
Consider a scenario in which you have an API call that returns search results:
function submitSearch(searchString) {
return makeApiCall(searchString);
}
const [ searchRequest, search ] = usePromise(submitSearch);
Now imagine that you have a text field that allows the user to enter a search query. Each time the user enters a character, a search is submitted:
<input
type="text"
onChange={e => {
if (searchRequest.cancel) {
searchRequest.cancel();
}
search(e.target.value);
}}
/>
The expectation here is that as multiple characters are entered, the state update process for previous searches will be canceled, resulting in a single status update containing the search results for the most recently entered search phrase - but that's not what happens. Instead, the state is updated with the results that are returned for every single keypress. This is because the implementation of usePromise
is rather naive. It only understands the concept of a "canceled" request at a global function level - not at the level of each individual call. In other words - with each subsequent call to search()
, the "canceled" flag is reset. As a result, by the time a search result comes back, the status update proceeds as if it was never canceled in the first place.
This works:
extendState(new Promise((resolve, reject) => {
// ...
}));
This doesn't (type error):
extendState(async () => {
// ...
});
A declarative, efficient, and flexible JavaScript library for building user interfaces.
๐ Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
The Web framework for perfectionists with deadlines.
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. ๐๐๐
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google โค๏ธ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.