vue-contenteditable

adding characters to specify position

HTML

<script src="https://cdn.bootcss.com/vue/1.0.26/vue.min.js"></script>
<div id="app">
  <div id="why" contenteditable="true">
      这是一个非常矬的实现，完全有赖于高手来优化了
  </div>
  <button @click="addFuck">Add Fucking</button>
</div>

JavaScript

var getCaretPosition = function(oField) {
    var iCaretPos = 0;
    var doc = oField.ownerDocument || oField.document;
    var win = doc.defaultView || doc.parentWindow;
    var sel;
    if (typeof win.getSelection != "undefined") {
        sel = win.getSelection();
        if (sel.rangeCount > 0) {
            var range = win.getSelection().getRangeAt(0);
            var preCaretRange = range.cloneRange();
            preCaretRange.selectNodeContents(oField);
            preCaretRange.setEnd(range.endContainer, range.endOffset);
            iCaretPos = preCaretRange.toString().length;
        }
    } else if ( (sel = doc.selection) && sel.type !== 'Control') {
        var textRange = sel.createRange();
        var preCaretTextRange = doc.body.createTextRange();
        preCaretTextRange.moveToElementText(oField);
        preCaretTextRange.setEndPoint('EndToEnd', textRange);
        iCaretPos = preCaretTextRange.text.length;
    }
    return (iCaretPos);
};

new Vue(
  el: '#app',
  methods: {
    addFuck: function() {
      var $why = this.$el.querySelector('#why');
      var index = getCaretPosition(this.$el.querySelector('#why'));
      $why.innerHTML = $why
                         .innerHTML
                         .split('')
                         .splice(index, 0, '[Fucking]')
                         .join('');
    }
  }
});