/TypeScript/Property 'value' does not exist on type 'HTMLElement'.

Property 'value' does not exist on type 'HTMLElement'.

document.getElementById() returns the type HTMLElement which does not contain a value property.
The subtype HTMLInputElement does however contain the value property.

So a solution is to cast the result of getElementById() to HTMLInputElement like this:

var inputValue = (<HTMLInputElement>document.getElementById(elementId)).value;
<> is the casting operator in typescript.
See TypeScript: casting HTMLElement: https://fireflysemantics.medium.com/casting-htmlelement-to-htmltextareaelement-in-typescript-f047cde4b4c3

The resulting javascript from the line above looks like this:

inputValue = (document.getElementById(elementId)).value;
i.e. containing no type information.

Source: fireflysemantics.medium.com

Similar codes

2 votes129 views1 answer
Create database and grant user rights mariadb
TypeScript
0 vote118 views1 answer
Convert object to list of objects c#
TypeScript
4 votes132 views4 answers
Ts import json
TypeScript
8 votes122 views3 answers
Initialize all elements of vector to 0 c++
TypeScript
10 votes127 views3 answers
Typescript array of object with types
TypeScript
0 vote128 views1 answer
Permalink of pending posts not working
TypeScript
1 vote242 views1 answer
Sort list of objects by attribute java
TypeScript
4 votes143 views1 answer
Pub schedule firebase
TypeScript
0 vote117 views1 answer
Slice string into segments of 2 characters
TypeScript
1 vote117 views1 answer
What is endurance testing
TypeScript