How to continuously execute a piece of code in vue

Vue.js is a progressive JavaScript framework for building user interfaces. Its main advantage is that it can easily perform two-way data binding, component development and modular management. In the development of Vue, sometimes we need to execute some specific code, such as scheduled execution, and will not stop until a certain condition is reached. This article will introduce how to implement a method of continuously executing a piece of code in Vue.

1. Use the setInterval method

The setInterval() method can execute the specified code within the specified time interval. In Vue, we can use the setInterval() method in the component to implement scheduled execution of code. The following is an example:

export default {
  data () {
    return {
      counter: 0
    };
  },
  mounted () {
    setInterval(() => {
      this.counter++;
    }, 1000);
  }
}

In the above code, we first define a counter variable as a counter, and then use the setInterval() method in the mounted cycle hook function of the component to execute anonymously every 1 second. Function that adds 1 to the value of counter. This way the code can be executed every once in a while.

2. Use the setTimeout method

The setTimeout() method can execute the specified code after the specified time, similar to the timer in JavaScript. In Vue, we can use the setTimeout() method to implement the function of continuously executing a piece of code. The following is an example:

export default {
  data () {
    return {
    };
  },
  methods: {
    execute() {
      console.log('执行代码');
      setTimeout(() => {
        this.execute();
      }, 1000);
    }
  },
  mounted() {
    this.execute();
  }
}

In the above code, we declare a function named execute. In the function body, we use the console.log() method to print out the "execution code" information, and use setTimeout() The method continues executing the execute function after 1 second. Call the execute function in the component's mounted cycle hook function. In this way, the function of executing code every 1 second can be achieved.

3. Use the watch method

In Vue, you can also use the watch method to continuously execute a piece of code. The watch method can monitor data changes and execute specified code when the data changes. The following is an example:

export default {
  data () {
    return {
      counter: 0
    };
  },
  watch: {
    counter () {
      setTimeout(() => {
        this.counter++;
      }, 1000)
    }
  },
  mounted() {
    this.counter++;
  }
}

In the above code, we declare a variable named counter as a counter, then monitor the change of counter in the watch of the component, and use the setTimeout() method to make the counter change when it changes. The value is incremented by 1 after 1 second. In the mounted cycle hook function of the component, we call the counter value, thus triggering the watch listening event.

Summary

The function of continuously executing a piece of code in Vue can be achieved through the setInterval() method, setTimeout() method and watch monitoring change method. When using these methods, you need to pay attention to whether there are memory leaks and other problems in the code to avoid program exceptions.

The above is the detailed content of How to continuously execute a piece of code in vue. For more information, please follow other related articles on the PHP Chinese website!