Function getSelection

docs/external/js/react-dom.development.js:7151–7169

* @getSelection: Gets the selection bounds of a focused textarea, input or * contentEditable node. * -@input: Look up selection bounds of this input * -@return {start: selectionStart, end: selectionEnd}

(input)

   */

  function getSelection(input) {
    var selection;

    if ('selectionStart' in input) {
      // Modern browser with input or textarea.
      selection = {
        start: input.selectionStart,
        end: input.selectionEnd
      };
    } else {
      // Content editable or old IE textarea.
      selection = getOffsets(input);
    }

    return selection || {
      start: 0,
      end: 0
    };
  }
  /**
   * @setSelection: Sets the selection bounds of a textarea or input and focuses
   * the input.