The text in this example of text-shadow doesn\'t display in IE 11, but does in FF & Chrome.
http://codepen.io/maxnguyen/pen/
According to caniuse.com IE
this a very tricky issue where you probabilly could not find any answer, if you open a simple html files to ie10 or ie11 this will show all your text-shadow but you intrigated apps does not support the text-shadow even it shows some error means red line under the text-shadow text.
You just need to change the meta tags for this...use these
 // ie supports
// for responsive