canvas verification code

19Nov2016

I found the node-canvas library and used it briefly, and found that it is quite easy to use.

22Mar2017

Demonstrate animation drawing skills based on HTML5 Canvas to achieve frame playback effects. It also demonstrates the basic skills of moving objects.

14Mar2018

This time I will bring you the verification code effect of drag verification using jQuery and vue. What are the precautions for using jQuery and vue to make the verification code effect of drag verification? The following is a practical case, let's take a look.

25May2023

As the Internet develops, website security becomes more and more important. One very important aspect is the verification code, which can effectively prevent malicious attacks and malicious registration operations. jQuery is a very popular JavaScript library, this article will introduce how to implement verification code in jQuery. 1. First, we need to generate a verification code image. Images can be generated using PHP or other server-side languages. Here we assume that there is already a file called captcha.php to generate the image. 2. In HT

19Sep2023

How to use Vue to implement verification code countdown effects. With the development of the Internet, verification codes have become one of the important means to protect user security. In order to improve user experience, we can use countdown effects to remind users of the remaining time to obtain the verification code. This article will introduce how to use Vue to implement the special effects of verification code countdown, and provide specific code examples. First, we need to create a Vue component to implement the verification code countdown function. In this component, we can define a countdown time variable to store the remaining seconds

20Sep2018

Usually we can see the verification code on the login interface. The function of the verification code is to detect whether a human is operating, prevent non-human operations such as machines, and prevent the database from being easily broken. Generally, verification codes are written in back-end languages ​​such as PHP and Java; in fact, verification codes can also be implemented using front-end technology: use canvas or SVG to draw the verification code. This chapter introduces how to use canvas to draw verification codes (code examples) in HTML5. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

28May2018

This article mainly introduces js+canvas to implement the sliding puzzle verification code function. This article combines the example code to introduce it step by step in very detail. Friends who need it can refer to it.

03Mar2017

Demonstrate HTML5 Canvas Fill and Stroke text effects, how to implement texture filling and stroke based on Canvas