Function onChange

external/.scrollLibs.js:13358–13365

(cm)

    if (isEmpty(cm)) setPlaceholder(cm)
  }
  function onChange(cm) {
    var wrapper = cm.getWrapperElement(),
      empty = isEmpty(cm)
    wrapper.className = wrapper.className.replace(" CodeMirror-empty", "") + (empty ? " CodeMirror-empty" : "")

    if (empty) setPlaceholder(cm)
    else clearPlaceholder(cm)
  }

  function isEmpty(cm) {
    return cm.lineCount() === 1 && cm.getLine(0) === ""