Editor.md实现拖拽剪切复制粘贴上传图片

Editor.md是一款开源的、可嵌入的 Markdown 在线编辑器（组件），基于 CodeMirror、jQuery 和 Marked 构建
本文主要介绍editor.md如何实现拖拽剪切复制粘贴上传图片

1. 新建 uploadImg.js 文件

function initPasteDragImg(Editor){
    var doc = document.getElementById(Editor.id)
    doc.addEventListener('paste', function (event) {
        var items = (event.clipboardData || window.clipboardData).items;
        var file = null;
        if (items && items.length) {
            // 搜索剪切板items
            for (var i = 0; i < items.length; i++) {
                if (items[i].type.indexOf('image') !== -1) {
                    file = items[i].getAsFile();
                    break;
                }
            }
        } else {
            console.log("当前浏览器不支持");
            return;
        }
        if (!file) {
            console.log("粘贴内容非图片");
            return;
        }
        uploadImg(file,Editor);
    });

    var dashboard = document.getElementById(Editor.id)
    dashboard.addEventListener("dragover", function (e) {
        e.preventDefault()
        e.stopPropagation()
    })
    dashboard.addEventListener("dragenter", function (e) {
        e.preventDefault()
        e.stopPropagation()
    })
    dashboard.addEventListener("drop", function (e) {
        e.preventDefault()
        e.stopPropagation()
     var files = this.files || e.dataTransfer.files;
     uploadImg(files[0],Editor);
     })
}
function uploadImg(file,Editor){
    var formData = new FormData();
    var fileName=new Date().getTime()+"."+file.name.split(".").pop();
    formData.append('editormd-image-file', file, fileName);

    $.ajax({
        url: Editor.settings.imageUploadURL,
        type: 'post',
        data: formData,
        processData: false,
        contentType: false,
        dataType: 'json',
        success: function (msg) {

            var success=msg['success'];
            if(success==1){
                var url=msg["url"];
                if(/\.(png|jpg|jpeg|gif|bmp|ico)$/.test(url)){
                    Editor.insertValue("![图片alt]("+msg["url"]+" ''图片title'')");
                }else{
                    Editor.insertValue("[下载附件]("+msg["url"]+")");
                }     
            }else{
                console.log(msg);
                alert("上传失败");
            }
        }
    });


}

2.引入并使用

initPasteDragImg(this); //在编辑器加载完毕后,初始化插件

<script src="js/upload_img.js"></script>
<script src="js/editormd.min.js"></script>
<script>
 var testEditor = editormd("test-editormd", {
     width   : "98%",
     height  : 900,
     syncScrolling : "single",
     path    : "lib/",
     saveHTMLToTextarea : true,    // 保存 HTML 到 Textarea
     imageUpload : true,
     imageFormats : ["jpg", "jpeg", "gif", "png", "bmp", "webp"], 
     imageUploadURL: '/addons/qiniu/index/uploadByEditormd',
     onload: function(){
         initPasteDragImg(this); //必须
     }
});    
</script>