Function isDirty

static/vuejs/vue.esm.js:5972–5975

(elm, checkVal)

}

function isDirty (elm, checkVal) {
  // return true when textbox (.number and .trim) loses focus and its value is not equal to the updated value
  return document.activeElement !== elm && elm.value !== checkVal
}

function isInputChanged (elm, newVal) {
  var value = elm.value;