change selected div size in typescript

To change the size of a selected div using TypeScript, you would first need to select the div element using a DOM manipulation method like document.querySelector(). Once you have the reference to the element, you can set its CSS properties as desired.

Here's an example code snippet that changes the size of a div element to 200px width and 100px height:

index.ts
const divElement = document.querySelector('div') as HTMLDivElement;
divElement.style.width = '200px';
divElement.style.height = '100px';
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In the above code, we first select the div element using document.querySelector(). This method returns a general HTMLElement type, so we need to typecast it to an HTMLDivElement to access its specific properties. Then we set the width and height styles of the divElement to 200px and 100px, respectively.

Note: you will need to have the appropriate CSS selector for your specific div element in the document.querySelector('<selector>') method.