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Using PnP-JS i found this should be possible here are two links showing the update () function. https://github.com/SharePoint/PnP-JS-Core/wiki/Basic–Operations First of all, instead of getting all items in the List, and then filtering for the current user, you should get only the item (s) for the current user to begin with.
How to render multiple JSX elements in react?
To render multiple JSX elements in React, you can loop through an array with the.map () method and return a single element. Below, you loop through the reptiles array and return a li element for each item in the array. You can use this method when you want to display a single element for each item in the array:
Why do I need a key to render an array in react?
The component will create an ordered list of the items: However, if you look at the console, you will see a warning that each child in an array or iterator should have a unique key. The warning appears because when you attempt to render a collection inside a component, you must add a key.
How to return an element from an array in react?
Below, you loop through the reptiles array and return a li element for each item in the array. You can use this method when you want to display a single element for each item in the array: In the next example, you will examine why you would want to add a unique key to a list of elements rendered by an array.
Do you need a React component to use SPFX?
Since the release of version 1.9.1 of the SharePoint Framework this is no longer necessary because it is using a newer version of React, but be aware of this if you decide to start working on some older code that was built using an older version of SPFx. The previous example showed a React functional component that included state.
How to build a web part in SPFX?
I built a sample SPFx web part that uses a stateless function to reproduce the simple template web part created by the Yeoman generator. You can view the code on Github by following the link, where you will also find instructions for getting the sample working.
How is the state variable used in SPFX?
If you need more complex state you could pass a more complex object to useState but a better approach is often to simply call useState once for each variable that makes up the state. The output rendering uses the value of the state variable and does a conversion using the romanToString function: