Importing external Vue cannot run

Vue is a popular JavaScript framework that helps developers quickly build responsive web applications. In daily development, we may import Vue from the outside, but sometimes we will encounter some problems, such as the imported Vue cannot run. This article will introduce the causes and solutions to this situation.

1. Problem description

When we import Vue from the outside, we usually follow the following steps:

1. Download the Vue JavaScript file and save it to local.
2. Add code that references Vue in the HTML page, usually through script tags.
3. Use Vue in JavaScript code.

However, some developers will find that the Vue they imported cannot run properly after following the above steps. This may manifest as content in the Vue template not being displayed on the page, or syntax errors in the Vue code.

2. Cause of the problem

There may be many reasons for this situation. The following are some common reasons:

1. Vue version mismatch: It is possible that the Vue version used is inconsistent with the Vue version in the code, causing the code to fail to run correctly.
2. Vue file reference problem: It is possible that the Vue file is not correctly referenced into the HTML page, or the reference order is incorrect, causing the code to fail to execute.
3. Vue code errors: There may be syntax errors in the Vue code, causing the code to fail to execute.

3. Solutions

For the above reasons, here are some solutions for you:

1. Confirm the Vue version: First, confirm the version used The Vue version is consistent with the Vue version in the code. If it is inconsistent, you can try changing to the same version of Vue.
2. Confirm file references: Make sure the Vue files are correctly referenced into the HTML page and in the correct order. You can confirm this by viewing network requests and error messages through the console.
3. Check Vue code: Check the Vue code for syntax errors. If there are errors, fix them in time. You can use code editors, consoles, and other tools to check for code errors.
4. Vue's CDN reference: If the above method still cannot solve the problem, you can try to use Vue's CDN reference, that is, directly reference the Vue file from a server that hosts the Vue file. This approach avoids version mismatch and file reference issues.

To sum up, when we import Vue from the outside and it fails to run, we can adopt the above solutions to solve the problem. If you still can't solve it, you can ask for help in the community, or learn more solutions through the Vue official documentation.

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