0

我的项目中有多个 Dropzones，它们都非常相似。在其中一个上，我必须创建最小文件宽度，但视频 Dropzone 不适用于文件宽度代码。我最终不得不为每个 Dropzone 创建一个单独的选项调用。这为两个选项调用中的函数创建了许多重复的代码。有没有一种方法可以为我的所有选项创建命名函数表达式并使用名称，这样我就没有太多重复的代码？

Dropzone.options[item.substring(1, item.length)] = {
    acceptedFiles: files,
    previewTemplate: document.getElementById('tpl').innerHTML,
    accept: function(file, done) {
        file.acceptDimensions = done;
        file.rejectDimensions = function () { done("Image must be at least 450 pixels wide."); }
    },
    init: function () {
        this.on("thumbnail", function (file) {
            if (file.width !== undefined) {
                if (file.width < 3 * 150) {   // File must be at least 3 blocks wide
                    file.rejectDimensions();
                } else {
                    file.acceptDimensions();
                }
            }
        });
        this.on("success", function (file, response) {
            // code here, including persist variable, which I need to pass in
            generateUIDs(Dropzone.forElement(item).files, persist);
            // more code
        });
    },
    sending: function (file) {
        Dropzone.forElement(item).removeAllFiles();
    },
    removedfile: function (file) {
        // code here, also need persist for this call
        generateUIDs(Dropzone.forElement(item).files, persist);
        //more code
    }
};

理想情况下，我希望accept、send 和removedFile 各为一行以引用命名函数表达式，并传入我的persist 变量。我希望init 事件做同样的事情。

4

1 回答 1

0

我想出了语法：

Dropzone.options[item.substring(1, item.length)] = {
    acceptedFiles: files,
    maxFilesize: 512,
    previewTemplate: document.getElementById('tpl').innerHTML,
    init: function () {
        this.on("success", function (file, response) { return DropzoneOnSuccess(file, response, item, persist, btn) });
    },
    sending: function (file) {
        Dropzone.forElement(item).removeAllFiles();
    },
    removedfile: function (file) { return DropzoneRemoved(file, item, persist, saver, btn); }
};

var DropzoneAccept = function (file, done) {
    file.acceptDimensions = done;
    file.rejectDimensions = function () { done("Image must be at least 450 pixels wide."); }
};

var DropzoneCheckThumbnail = function (file) {
    if (file.width !== undefined) {
        if (file.width < 3 * 150) {   // File must be at least 3 blocks wide
            file.rejectDimensions();
        } else {
            file.acceptDimensions();
        }
    }
};

var DropzoneOnSuccess = function (file, response, persist) {
    // code
    generateUIDs(Dropzone.forElement(item).files, persist);
    //more code
};

var DropzoneRemoved = function (file, persist) {
    // code
    generateUIDs(Dropzone.forElement(item).files, persist);
    // more code
};
于 2019-05-13T14:25:14.430 回答