vue development normal packaging error reporting

In Vue development, using webpack for packaging is a common operation. However, sometimes the same code can run normally in the development environment, but various errors will occur after packaging. This article will discuss how to solve some common errors that occur after packaging in Vue development.

1. Static resource path error

In Vue development, we often use static resources, such as pictures, fonts, etc. Under normal circumstances, we introduce these through relative paths Resources. However, after packaging, the paths of these resources may change, thus causing the problem of resource not being found.

Solution: In the Vue project, we can use the public folder to store static resources. These resources will not be packaged, but will be referenced through absolute paths. For example:

<template>
  <img  src="/static/imghwm/default1.png"  data-src="$publicPath/logo.png"  class="lazy"  : alt="vue development normal packaging error reporting" >
</template>

The $publicPath here will automatically change according to the packaged path, ensuring the correct reference of static resources.

2. Error in referencing third-party libraries

In Vue projects, referencing third-party libraries is a very common operation. However, after packaging, due to various module dependency issues that may exist in third-party libraries, packaging may fail or errors may be reported.

Solution: Before packaging, we need to add the dependencies of the third-party library to the webpack configuration. For example, configure in vue.config.js:

module.exports = {
  configureWebpack: {
    externals: {
      'jquery': 'window.jQuery'
    }
  }
}

The externals here set the external dependencies of the jquery library, that is, tell webpack that the library is defined in the global variable window.jQuery, not in the packaging file middle.

3. Error using ES6 syntax

In Vue development, we often use ES6 syntax to write JavaScript code. However, after packaging, some older browsers may not be able to parse these syntaxes, causing code errors.

Solution: Before packaging, we can use the babel tool to convert ES6 syntax into ES5 syntax, so that it can run on older browsers. In Vue projects, babel configuration is usually in babel.config.js. For example:

module.exports = {
  presets: [
    '@vue/cli-plugin-babel/preset'
  ]
}

@vue/cli-plugin-babel/preset here is the babel preset that comes with Vue CLI, which converts ES6 code into ES5 code.

4. Missing modules or dependency errors after packaging

In Vue development, we often use the npm package manager to install some dependent libraries, which are also included during packaging. Packed in. But in some cases, missing modules or dependency errors may appear after packaging.

Solution: Usually this error is caused by some dependency errors in package.json or some packages are not installed correctly. We can use the npm installation command to reinstall the missing packages. For example:

npm i axios

The axios here is a common npm package. The installation command will re-download and install the package and its dependencies.

Summary:

There may be many reasons for packaging errors in Vue development, but in most cases they can be solved by debugging the console and searching for documentation. During development, we need to plan and organize the code to ensure code quality and reliability, so as to avoid some common packaging errors.

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