WeChat applet update mechanism && How to let WeChat users update the small program

... Update mechanism Later, Update applet code: According to the api provided by WeChat, you can detect whether there is a new version of the applet. The code is as follows let updateManager = wx.getUpdateManager(); updateManager.onCheckForUpdate(function (res) { // Callback to request new...


Vue+elementui custom Dialog component login bullet box dialog box (implementing different vue component association)

... elementui provides a component that can realize the bullet box el-dialog, generally will write the bullet box in a vue file, through El-dialog is similar to this <el-button round @click="dialogFormVisible = true">login</el-button> <el-dialog title="Login" :visible.sync=...


Merging sorting

... Merge sort is an efficient sorting algorithm based on merge operations. This algorithm is a very typical application using Divide and Conquer. As a typical algorithmic application of divide and conquer, the implementation of merge sorting consists of two methods: top-down recursion (all...


Click the button to achieve the file download

... 一, use the background Generally speaking, when we upload the file, we will provide the file download entry. In fact, the file download is the process of getting the file and writing the content of the file to HTTP to return the response. 二, front-end implementation 结构form form...


There are several ways to solve the $ is not defined

... $ is not defined, there are several possibilities: 1. There is no jQuery jar package imported. 2. jQuery jar package is put into WEB-INF, jQuery jar package is best placed under WebContent, with WEB-INF 3. Import jQuery pathname is not written to 4.jQuery does not contain js Wrong...


Usage of addEventListener in JS

... 事件模型 This is a complete event stream: Event Capture----At Target----Event Bubbling Note: Event Capture is compatible with browsers The problem is less used event handler (addEventListener) format: element.addEventListener(type, handle, false); type: event trigger type, such as click,...


The Wangtesting column

... 一, the premise is currently writing VUE, the ES6 used in the JS language, so look at the basic syntax of ES6 again. 二,概要 ECMAScript2015(ES6) is the most standard grammar of Javascript. It is the latest version released by the Ecma nationality organization in June 2015. It has been...


Jqgrid method: setCell changes the value of the cell && changes the value of the cell attribute

... setCell rowid,colname, data, class, properties jqGrid object changes the value of the cell. Rowid: current row id; colname: column name, or column position index, starting from 0; data: changing the contents of the cell, if it is empty, it is not updated; class: if it is string, it will...


The Hiden hidden field

... in the input tag is a hidden field in html. The main role is: 1. The hidden field is invisible to the user on the page. The purpose of inserting the hidden field in the form is to collect or send information to facilitate the use of the program being processed. When the viewer clicks...


The city selection component written by React Native

... Nowadays, the city list selection component is in great demand in business, so today React Naitve is used to implement a city list function. Not to mention, let's take a look at the effect of the implementation: According to the effect, it is very similar to the address book of the...