how to get the selected text in javascript code example

Example 1: get selected text js

// Get highlighted text this way:

window.getSelection().toString()

Example 2: get selected text input javascript

function disp() {
  var text = document.getElementById("text");
  var t = text.value.substr(text.selectionStart, text.selectionEnd - text.selectionStart);
  alert(t);
}