JSLint 意外的“那个”消息

Question

我刚刚开始使用 JSLint 来确保我创建的 JavaScript 代码至少符合一些标准，但我收到了一条令人困惑的消息：

JSLint: Unexpected 'that'.

代码是实现进度条的解决方案的一部分，其中一部分是处理定时器和回调的这个对象，如下（这是从一个较大文件的开头摘录，我可以添加整个文件如果需要）：

var ProgressHandler = function () {
    "use strict";

    // Build a new object
    var that = {};

    // Add basic properties
    that.taskid = 0;
    that.timerid = 0; // Timer ID used to push refreshes
    that.progressUrl = ""; // URL to invoke to read progress
    that.interval = 500; // The interval for progress refresh
    that.taskProgressCallback = null; // The user-defined callback that refreshes the UI 
    that.taskCompletedCallback = null; // The user-defined callback that finalizes the call 

    // Set progress url
    that.setProgressUrl = function (url) {
        that.progressUrl = url;
        return this;
    }

    // Set frequency of refresh
    that.setInterval = function (interval) {
        that.interval = interval;
        return this;
    };

消息出现在以that.setInterval 开头的行上。我还有其他用途，但 JSLint 也说它此时停止处理。我已尝试搜索此消息，但未在此处或 jslinterrors.com 上专门列出。

为什么会出现这种情况，我可以做些什么来解决它？还是应该忽略它？

Answer 1

问题似乎是在that.setProgressUrl 的定义之后没有;。改为：

    // Set progress url
    that.setProgressUrl = function (url) {
        that.progressUrl = url;
        return this;
    };

解决了报告的问题。然后，您会遇到一个问题，即文件末尾缺少右括号和分号，不确定这是否只是复制和粘贴问题。完整的脚本应该如下所示：

var ProgressHandler = function () {
    "use strict";

    // Build a new object
    var that = {};

    // Add basic properties
    that.taskid = 0;
    that.timerid = 0; // Timer ID used to push refreshes
    that.progressUrl = ""; // URL to invoke to read progress
    that.interval = 500; // The interval for progress refresh
    that.taskProgressCallback = null; // The user-defined callback that refreshes the UI 
    that.taskCompletedCallback = null; // The user-defined callback that finalizes the call 

    // Set progress url
    that.setProgressUrl = function (url) {
        that.progressUrl = url;
        return this;
    };

    // Set frequency of refresh
    that.setInterval = function (interval) {
        that.interval = interval;
        return this;
    };
};