TypeScript Version: 2.0.3

Code

const propName: string = 'position';

const div = document.getElementsByTagName('div')[0];
div.style[propName] = 'absolute';

Expected behavior:
Styles are dynamically settable with dictionary access; the above snippet should set position: absolute on div

Actual behavior:
Throws

ERROR(4,1): : Element implicitly has an 'any' type because index expression is not of type 'number'.

Must use format style.setProperty(key, value);