Programmer Think

Wechat applet upload file 1, Explain The photographing component has the function of wechat authorized camera and will transfer the uploaded pictures to the parent page in the form of array collection in combination with the back-end interface. Note: the component is suitable for uploading pictures separately without carrying parameters. Afte ...

preface The company has recently developed a program. The requirement is to obtain customer ID from the database through the user's mobile phone number, and carry out the following series of operations according to customer ID. Here is a summary of the experience: 1. Authorization to obtain ciphertext according to Official documents ...

In a quick review, flex layout is basically used I Basic concepts of Flex layout All child elements of the Flex layout automatically become members of the container, called Flex items. The container has two axes: the main axis and the cross axis. As shown in the figure below. II The attribute of the container (that is, the attribute of the ...

preface The previous articles are to lay the foundation for Jetpack. This article will officially enter the analysis of various components of Jetpack from Lifecycle. Through this article, you will learn: 1. Why Lifecycle? 2. How is Lifecycle used? 3. How does Lifecycle perceive the Lifecycle 4. Lifecycle memory leak? 5. Summary 1. Why L ...

Today, we use vue3+ts+setup grammar sugar to implement an infinitely nested tree component. First, we will see the effect of the implementation. The style has not been much modified. This article is very basic, and I am mainly new to vue3. Recently, I have also started to practice using vue3 to implement a set of vue2 components when the compa ...

Wechat applet day 3 1. Page navigation 1.1 two ways to realize page navigation in applet What is page navigation Page navigation refers to the mutual jump between pages. For example, there are two ways to realize page navigation in the browser: a labellocation.href Two ways to realize page navigation in applet Declarative navigati ...

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1. Preface If you have been in contact with wechat applets, you know that operations involving some user sensitive information (such as positioning, accessing personal information, etc.) require user authorization. When we use applets, we may also see the scene that the authorization box pops up before an operation, which requires the user' ...

Foreword: I believe junior front-end engineers will think of local storage and sessionStorage. Then I will answer the difference between the three. Please, these are not the key information that the interviewer wants to get. Cookies belong to the basic knowledge of computer networks. Next, let's unveil the mystery of cookie s from Baidu Encyclo ...

When the wind blows, the clouds are flying, and an de Meng Shi walks everywhere. BUG, you have to change it at any time. If you don't change it, you can't. think about it. When you're alone, you can't use it when you eat hot pot and sing songs after work! This paper sorts out the wechat applet Wx The requestpayment reported an error or did not ...