Comments (5)
Maybe TS is smart enough to infer notnullability from this:
if(state.foo) state = iassign(state, g=>g.foo.bar, s => 1);
Otherwise ! might be used (or there is another syntax?).
if(state.foo) state = iassign(state, g=>g!.foo.bar, s => 1);
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IMHO I think that your "if" logic should go to "setter" function. Getter is just "semantical description of path", it is not real imperative code... hence no imperative "if".
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Hmm. That makes the setter bit awkward depending on the case. I think #15 would solve this nicely?
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Interesting use case, I don't think #15 (proxy) would work for your case. But feel free to try out that pull request, and let me know if it works.
Another solution I can think of is using nested iassign.
const newState = i(
state,
s => s.foo,
(foo) => {
return i(foo || {}, (f) => f.bar, () => 1);
},
);
from immutableassign.
Hi epeli,
Your use case should work now with 2.0.4 and following modification:
let newState = i(
state,
s => {
const foo = s.foo;
if (foo) {
return foo.bar;
}
// must return the same value as the setProp() to prevent update.
return 1;
},
() => 1,
undefined,
{
ignoreIfNoChange: true,
}
);
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Related Issues (20)
- Module "immutable-assign" has no default export. HOT 5
- Error when freeze and ignoreIfNoChange both true HOT 2
- iassign does not work correctly with ES6 Map HOT 2
- Error when using bracket notation to access property in getProp HOT 2
- Return the existing object when the value being set hasn't changed HOT 1
- Add a function to only freeze (if enabled) HOT 6
- Proxy polyfill not applied on iOS 9.0 / Android 6.0 HOT 3
- typescript types for immutable-assign HOT 6
- Does not work with create-react-app HOT 1
- Unexpected behavior when Proxy === undefined HOT 2
- Feature request: Allow specifying the path of property to update by an array HOT 2
- How does this compare to immer? HOT 2
- Unexpected behaviour when console.log-ing or using lodash/fp/find HOT 3
- An in-range update of coveralls is breaking the build 🚨 HOT 1
- Nicer API HOT 8
- Support classes HOT 2
- ES6 arrow functions without the `return` keyword don't work as getProp HOT 2
- Provide initialization method HOT 2
- Cannot assign freeze property HOT 3
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