vue error reporting

As one of the currently popular front-end frameworks, Vue.js provides many convenient development functions. Among them, error reporting is a very important technology, which can help us find and solve errors in the program in time, and improve the stability and reliability of the program. This article will introduce the knowledge about error reporting in Vue.js and provide some practical methods for your reference.

1. The Importance of Vue.js Error Reporting

As the website continues to develop, the front-end code becomes more and more complex and difficult to maintain. At the same time, it is inevitable that various All kinds of errors. These errors not only affect the performance and stability of the website, but also affect the user experience and trust. Therefore, we need to establish a complete error reporting system to obtain error information in the program in a timely manner and repair them quickly.

For the Vue.js framework, error reporting needs to be handled in the following three aspects: Vue.js component errors, Vue.js routing errors, and Vue.js asynchronous request errors. Below we will introduce them one by one.

2. Vue.js component error reporting

When an error occurs in the Vue.js component, we can report the error through some means. The most common method is to use the errorCaptured lifecycle hook provided by Vue.js.

errorCaptured is defined as follows:

(error: Error, instance: Vue, info: string) => boolean | void

Among them, error represents the captured error object, instance represents the Vue instance where the error occurred, and info represents the specific location where the error occurred. We can call third-party error logging tools in errorCaptured to report error information to the backend server for analysis and repair.

The sample code is as follows:

import Vue from 'vue'
import * as Sentry from '@sentry/browser'

Vue.config.errorHandler = (err, vm, info) => {
  console.error(err)
  Sentry.captureException(err)
}

Vue.mixin({
  errorCaptured(err, vm, info) {
    console.error(err)
    Sentry.captureException(err)
  }
})

In the above code, we introduced the Sentry library as a third-party error logging tool. Here we implement reporting of Vue.js component errors by overriding Vue.config.errorHandler and Vue.mixin.errorCaptured.

3. Vue.js routing error reporting

Vue.js routing errors may affect the user experience and are difficult to track and repair. Therefore, we need to establish a unified routing error handler to report and handle routing errors.

The specific steps are as follows:

1. Define a routing interceptor to capture routing errors.

router.beforeEach((to, from, next) => {
  const error = new Error(`Route not found: ${to.fullPath}`)
  error.statusCode = 404
  error.isNotFound = true
  next(error)
})

2. In the route interceptor, report the error to the server and perform error handling.

router.beforeEach((to, from, next) => {
  const error = new Error(`Route not found: ${to.fullPath}`)
  error.statusCode = 404
  error.isNotFound = true
  next(error)
})

router.onError(error => {
  console.error(error)
  Sentry.captureException(error)
})

In the above code, we use the Sentry library to record routing errors.

4. Vue.js asynchronous request error reporting

In Vue.js development, asynchronous requests also occupy an important position. Asynchronous request errors may cause page crashes, so we need to detect and handle these errors through error reporting.

Normally, we can encapsulate the axios library and use response interceptors for error handling and reporting.

The specific example code is as follows:

import axios from 'axios'
import * as Sentry from '@sentry/browser'

const instance = axios.create({
  baseURL: process.env.VUE_APP_BASE_API,
  timeout: 5000
})

instance.interceptors.response.use(
  response => {
    const res = response.data
    if (res.code !== 0) {
      const error = new Error(res.message || 'Request failed')
      error.statusCode = res.code
      throw error
    }
    return res.data
  },
  error => {
    console.error(error)
    Sentry.captureException(error)
    return Promise.reject(error)
  }
)

export default instance

In the above code, we encapsulated the response interceptor of axios by introducing the Sentry library. When an asynchronous request error occurs, we will report the error object through the captureException method of the Sentry library.

5. Conclusion

Vue.js error reporting is a very important development technology, which can help us discover and solve errors in the program in a timely manner and improve the stability and reliability of the program. This article provides practical error reporting methods for Vue.js components, routing and asynchronous requests. I hope it will be helpful to everyone.

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