KeyboardEvent: Property 'value' does not exist on type 'EventTarget'
I've copied some code from Angular's page and visual code is showing an error:
Error for this line:
map((e: KeyboardEvent) => e.target.value),
Error
Property 'value' does not exist on type 'EventTarget'.
Code from Angular website:
import { fromEvent } from 'rxjs';
import { ajax } from 'rxjs/ajax';
import { map, filter, debounceTime, distinctUntilChanged, switchMap } from 'rxjs/operators';
const searchBox = document.getElementById('search-box');
const typeahead = fromEvent(searchBox, 'input').pipe(
map((e: KeyboardEvent) => e.target.value),
filter(text => text.length > 2),
debounceTime(10),
distinctUntilChanged(),
switchMap(() => ajax('/api/endpoint'))
);
typeahead.subscribe(data => {
// Handle the data from the API
});
javascript angular
asked Dec 31 '18 at 13:17
mattmatt
577
add a comment |
I've copied some code from Angular's page and visual code is showing an error:
Error for this line:
map((e: KeyboardEvent) => e.target.value),
Error
Property 'value' does not exist on type 'EventTarget'.
Code from Angular website:
import { fromEvent } from 'rxjs';
import { ajax } from 'rxjs/ajax';
import { map, filter, debounceTime, distinctUntilChanged, switchMap } from 'rxjs/operators';
const searchBox = document.getElementById('search-box');
const typeahead = fromEvent(searchBox, 'input').pipe(
map((e: KeyboardEvent) => e.target.value),
filter(text => text.length > 2),
debounceTime(10),
distinctUntilChanged(),
switchMap(() => ajax('/api/endpoint'))
);
typeahead.subscribe(data => {
// Handle the data from the API
});
javascript angular
asked Dec 31 '18 at 13:17
mattmatt
577
What is the type ofEventTargethere ?
– Sachin Gupta
Dec 31 '18 at 13:19
1
input element....
– matt
Dec 31 '18 at 13:24
Can you provide a MCVE? Can't reproduce the issue on my side.
– Nino Filiu
Dec 31 '18 at 13:37
@matt Is the problem solved?
– Saddam Pojee
Jan 6 at 13:14
add a comment |
I've copied some code from Angular's page and visual code is showing an error:
Error for this line:
map((e: KeyboardEvent) => e.target.value),
Error
Property 'value' does not exist on type 'EventTarget'.
Code from Angular website:
import { fromEvent } from 'rxjs';
import { ajax } from 'rxjs/ajax';
import { map, filter, debounceTime, distinctUntilChanged, switchMap } from 'rxjs/operators';
const searchBox = document.getElementById('search-box');
const typeahead = fromEvent(searchBox, 'input').pipe(
map((e: KeyboardEvent) => e.target.value),
filter(text => text.length > 2),
debounceTime(10),
distinctUntilChanged(),
switchMap(() => ajax('/api/endpoint'))
);
typeahead.subscribe(data => {
// Handle the data from the API
});
javascript angular
asked Dec 31 '18 at 13:17
mattmatt
577
I've copied some code from Angular's page and visual code is showing an error:
Error for this line:
map((e: KeyboardEvent) => e.target.value),
Error
Property 'value' does not exist on type 'EventTarget'.
Code from Angular website:
import { fromEvent } from 'rxjs';
import { ajax } from 'rxjs/ajax';
import { map, filter, debounceTime, distinctUntilChanged, switchMap } from 'rxjs/operators';
const searchBox = document.getElementById('search-box');
const typeahead = fromEvent(searchBox, 'input').pipe(
map((e: KeyboardEvent) => e.target.value),
filter(text => text.length > 2),
debounceTime(10),
distinctUntilChanged(),
switchMap(() => ajax('/api/endpoint'))
);
typeahead.subscribe(data => {
// Handle the data from the API
});
javascript angular
javascript angular
asked Dec 31 '18 at 13:17
mattmatt
577
asked Dec 31 '18 at 13:17
mattmatt
577
asked Dec 31 '18 at 13:17
mattmatt
577
asked Dec 31 '18 at 13:17
mattmatt
577
asked Dec 31 '18 at 13:17
mattmatt
577
577
What is the type ofEventTargethere ?
– Sachin Gupta
Dec 31 '18 at 13:19
1
input element....
– matt
Dec 31 '18 at 13:24
Can you provide a MCVE? Can't reproduce the issue on my side.
– Nino Filiu
Dec 31 '18 at 13:37
@matt Is the problem solved?
– Saddam Pojee
Jan 6 at 13:14
add a comment |
What is the type ofEventTargethere ?
– Sachin Gupta
Dec 31 '18 at 13:19
1
input element....
– matt
Dec 31 '18 at 13:24
Can you provide a MCVE? Can't reproduce the issue on my side.
– Nino Filiu
Dec 31 '18 at 13:37
@matt Is the problem solved?
– Saddam Pojee
Jan 6 at 13:14
What is the type of
EventTarget here ?– Sachin Gupta
Dec 31 '18 at 13:19
What is the type of
EventTarget here ?– Sachin Gupta
Dec 31 '18 at 13:19
1
1
input element....
– matt
Dec 31 '18 at 13:24
input element....
– matt
Dec 31 '18 at 13:24
Can you provide a MCVE? Can't reproduce the issue on my side.
– Nino Filiu
Dec 31 '18 at 13:37
Can you provide a MCVE? Can't reproduce the issue on my side.
– Nino Filiu
Dec 31 '18 at 13:37
@matt Is the problem solved?
– Saddam Pojee
Jan 6 at 13:14
@matt Is the problem solved?
– Saddam Pojee
Jan 6 at 13:14
add a comment |
1 Answer
1
active
oldest
votes
Since, Typescript can't infer the event type. You need to explicitly write the type of the HTMLElement which is your target. For example, if it's type is HTMLInputElement then you can write the below line:
map((e: KeyboardEvent) => (<HTMLInputElement>e.target).value),
This will solve your problem.
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Since, Typescript can't infer the event type. You need to explicitly write the type of the HTMLElement which is your target. For example, if it's type is HTMLInputElement then you can write the below line:
map((e: KeyboardEvent) => (<HTMLInputElement>e.target).value),
This will solve your problem.
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
add a comment |
Since, Typescript can't infer the event type. You need to explicitly write the type of the HTMLElement which is your target. For example, if it's type is HTMLInputElement then you can write the below line:
map((e: KeyboardEvent) => (<HTMLInputElement>e.target).value),
This will solve your problem.
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
add a comment |
Since, Typescript can't infer the event type. You need to explicitly write the type of the HTMLElement which is your target. For example, if it's type is HTMLInputElement then you can write the below line:
map((e: KeyboardEvent) => (<HTMLInputElement>e.target).value),
This will solve your problem.
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
Since, Typescript can't infer the event type. You need to explicitly write the type of the HTMLElement which is your target. For example, if it's type is HTMLInputElement then you can write the below line:
map((e: KeyboardEvent) => (<HTMLInputElement>e.target).value),
This will solve your problem.
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
answered Dec 31 '18 at 14:29
Saddam PojeeSaddam Pojee
75019
75019
add a comment |
add a comment |
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What is the type of
EventTargethere ?– Sachin Gupta
Dec 31 '18 at 13:19
1
input element....
– matt
Dec 31 '18 at 13:24
Can you provide a MCVE? Can't reproduce the issue on my side.
– Nino Filiu
Dec 31 '18 at 13:37
@matt Is the problem solved?
– Saddam Pojee
Jan 6 at 13:14