Question

我的项目中有多个非常相似的Dropzone。在其中之一上，我必须创建最小文件宽度，但是视频Dropzone无法使用文件宽度代码。我最终不得不为每个Dropzone创建一个单独的选项调用。这为两个选项调用上的函数创建了很多重复的代码。有没有一种方法可以为所有选项创建命名函数表达式并使用名称，以使我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，我希望接受，发送和removeFile成为一行，以引用命名的函数表达式，并传入我的persistant变量。我希望init事件做同样的事情。 / p>

Answer 1

我弄清楚了语法：

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
};

如何在Dropzone选项上设置命名函数表达式？

1 个答案: