How to implement sliding verification function in Vue-Vue.js-php.cn

How to implement sliding verification function in Vue

王林

Release： 2023-11-07 09:19:43

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How to implement sliding verification function in Vue

Sliding verification is a common verification method and is widely used in user login, registration, comment and other scenarios. This article will introduce how to use the Vue framework to implement a simple sliding verification function and provide specific code examples.

First, we need to install the Vue framework. Vue can be installed through the npm command:

npm install vue

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Next, we create a Vue instance and define the required data and methods. In this sliding verification function, we need a flag to determine whether the verification is completed, and a variable to record the position of the slider.

new Vue({
  el: "#app",
  data: {
    isVerified: false,
    startX: 0,
    endX: 0
  },
  methods: {
    handleMouseDown(event) {
      this.startX = event.clientX;
    },
    handleMouseMove(event) {
      if (this.startX === 0) return;
      this.endX = event.clientX;
    },
    handleMouseUp() {
      if (this.startX === 0 || Math.abs(this.endX - this.startX) < 50) {
        this.reset();
        return;
      }
      this.isVerified = true;
    },
    reset() {
      this.startX = 0;
      this.endX = 0;
    }
  }
});

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In the above code, isVerified is used to determine whether the verification is completed, startX and endX are used to record the start of the slider respectively. position and end position. The handleMouseDown method is used to record the position when the mouse is pressed, the handleMouseMove method is used to record the position when the mouse moves, the handleMouseUp method is used to verify the position of the slider Whether the requirements are met and the isVerified value is updated, the reset method is used to reset the slider position.

Next, we create an element containing the slider and validation button in HTML and bind the corresponding event handling method:

<div id="app">
  <div class="slider-container">
    <div class="slider" @mousedown="handleMouseDown" @mousemove="handleMouseMove" @mouseup="handleMouseUp"></div>
    <div class="verify-button" v-if="!isVerified">验证</div>
    <div class="success-message" v-else>验证成功</div>
  </div>
</div>

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In CSS, we can add some styles to Define the appearance of the sliding verification component:

.slider-container {
  width: 300px;
  height: 50px;
  background-color: #f0f0f0;
  position: relative;
}

.slider {
  width: 50px;
  height: 50px;
  background-color: #428bca;
  position: absolute;
  cursor: pointer;
}

.verify-button {
  width: 50px;
  height: 50px;
  background-color: #fff;
  line-height: 50px;
  text-align: center;
  position: absolute;
  right: 0;
  top: 0;
  cursor: pointer;
}

.success-message {
  width: 100%;
  height: 100%;
  background-color: #5cb85c;
  line-height: 50px;
  text-align: center;
  color: #fff;
  font-size: 18px;
  display: flex;
  justify-content: center;
  align-items: center;
}

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In the above code, slider-container is the container for the slider and verification button, slider is the slider, verify-button is the verification button, success-message is the prompt message for successful verification.

Finally, we introduce Vue and the file where the above code is located in index.html to see the effect of the sliding verification function.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>滑动验证</title>
  <link rel="stylesheet" href="styles.css">
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
  <div id="app">
    <div class="slider-container">
      <div class="slider" @mousedown="handleMouseDown" @mousemove="handleMouseMove" @mouseup="handleMouseUp"></div>
      <div class="verify-button" v-if="!isVerified">验证</div>
      <div class="success-message" v-else>验证成功</div>
    </div>
  </div>
  <script src="main.js"></script>
</body>
</html>

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When the position of the slider exceeds a certain threshold (here set to 50 pixels), the sliding verification will succeed and a verification success message will be displayed.

Through the above steps, we successfully implemented the sliding verification function in Vue. This function can be easily applied to various scenarios that require verification to protect the security of user information.

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