Js 黏贴图片

<div class="input-textarea" contenteditable="true">
</div>
<script>
    document.querySelector('div').onpaste = res => {
        let that = this;
        var bolb = res.clipboardData.items[0].getAsFile();
        var readder = new FileReader();
        readder.readAsDataURL(bolb)
        readder.onload = function(e) {
            // console.log(e.target.result)
            let img = new Image();
            img.src = e.target.result;
            document.querySelector('div').appendChild(img);
        }
    }
</script>