let _this = this; let param = new URLSearchParams();

As an AI language model, I cannot give a definite answer without knowing the context of the code. However, I can provide some insights on what this code snippet does.

The first line of code creates a reference to the current object, which is commonly used to avoid conflicts with other variables or functions that may have the same name.

The second line creates a new instance of the URLSearchParams class. This class is used to manipulate the query string of a URL by parsing, adding, or removing parameters.

Without more information, it is difficult to determine how these two lines of code are used in a broader context.

相关问题

let file = e.target.files[0]; this.url_1 = this.$options.methods.getObjectURL(file); console.log("uname:" + this.$route.query.uname); let uname = this.$route.query.uname; let param = new FormData(); //创建form对象 param.append("file", file, file.name); //通过append向form对象添加数据 param.append("uname", uname) var timer = setInterval(() => { this.myFunc(); }, 30); let config = { headers: {"Content-Type": "multipart/form-data"}, }; //添加请求头 axios .post(this.server_url + "/upload", param, config) .then((response) => { this.percentage = 100; clearInterval(timer); this.url_1 = response.data.image_url; this.srcList.push(this.url_1); this.url_2 = response.data.draw_url; this.srcList1.push(this.url_2); this.fullscreenLoading = false; this.loading = false;

这段代码看起来是一个前端页面中上传文件的处理逻辑。当用户上传一个文件后，会将文件转化为一个 FormData 对象，并添加一些其他参数，如用户名，然后通过 axios 发送一个 POST 请求到服务器的 /upload 接口。在服务器处理上传文件的过程中，前端会每隔 30 毫秒调用一个 myFunc 函数，来更新上传进度条的显示。当上传完成后，会将服务器返回的图片地址存储到前端的 srcList 数组中。

queryList(pageNum){ let param = new URLSearchParams(); param.append("pageNum",pageNum); axios.post("/day0530/company/list",param) .then(response=>{ let resp = response.data; this.name = resp.data.name; this.pageInfo = resp.data.pageInfo; //跳转到第几页的页码 this.num = resp.data.pageInfo.pageNum; }) },

这段代码定义了一个名为`queryList`的函数，函数接收一个`pageNum`参数。在函数内部，首先创建了一个`URLSearchParams`对象`param`，然后通过`append()`方法向该对象添加了一个名为`pageNum`的参数，值为传入的`pageNum`参数。接着，使用`axios`库的`post()`方法向`/day0530/company/list`这个API发送一个POST请求，并将`param`对象作为请求体发送。当请求成功后，响应数据会在`then()`方法中的`response`参数中获得。接下来，从响应数据中获取了`data`属性的`name`属性和`pageInfo`属性，并将它们分别赋值给了`this`对象的`name`和`pageInfo`属性。最后，将`pageInfo`属性中的`pageNum`属性的值赋值给了`this`对象的`num`属性。总体来说，这段代码的作用是向一个API发送一个POST请求，获得分页数据，并将数据分别赋值给`this`对象的`name`、`pageInfo`和`num`属性。