Summary of SEO optimization skills and practical experience in JavaScript development

JavaScript is a powerful programming language that is widely used in modern web development. However, compared with server-side rendered web pages, web pages developed using the JavaScript SPA (Single Page Application) framework have some SEO (Search Engine Optimization) problems. For example, they may not be optimized by search engines, or may be ranked lower by search engines. In this article, we will introduce some SEO optimization techniques and practical experience in JavaScript development.

1. Page Rendering

Since the JavaScript SPA framework is based on client-side rendering, search engine crawlers cannot obtain the page HTML generated in real time. For most search engines, they can only see the original HTML content of the page and some static tags. To solve this problem, we can use server-side rendering (SSR) or prerendering technology.

1. Server-side rendering

Using server-side rendering (SSR) technology, dynamic HTML can be generated on the server side and sent to the browser. In this way, we can maintain the development advantages of front-end JavaScript frameworks as well as SEO optimization at the same time. This is because search engines can read and process the rendered HTML code.

In the React framework, we can use the server-side rendering function provided by Next.js. In the Vue framework, we can use the same functionality provided by Nuxt.js.

2. Pre-rendering

Pre-rendering is a method of generating HTML at build time. The advantage of this method is that it generates full HTML and allows search engine crawlers to directly read the content of the page. This pre-rendered content can be generated before the site is published.

When using pre-rendering technology, we can use existing pre-rendering tools, such as Prerender.io or Puppeteer. These tools crawl each SPA page and convert it into a static HTML file for use by search engine crawlers.

2. URL routing

In SEO optimization, the structure of the page URL has a very important impact on search engine rankings and user search experience. Web applications based on JavaScript SPA frameworks usually use different parameters and hash values ​​as routes instead of regular links. This is detrimental to the behavior of search engine crawlers. Therefore, we need to convert these routes into standard URL forms.

1. Using historical routing mode

For modern JavaScript SPA frameworks, we usually use the HTML5 history API for routing operations. This technique allows us to simulate jumps in the browser history stack without causing a page refresh. After using the historical routing mode, we can convert the page routing into a standard URL form.

2. Use server redirection

If we need to convert an existing website from hash-based routing (such as /location/#/page) to a standard URL Routing (such as /location/page), we can use server-side redirection tools. During the redirect, the server can convert the old routing components into the new standard URL form and send it to the browser. This will allow our website to be indexed more effectively by search engine crawlers.

3. Meta tag

Meta tag is an HTML tag used by web pages to provide additional information. In search engines, for modern JavaScript SPA frameworks, since most of the page content is loaded asynchronously, we need to add key information to the Meta tag to help search engines better understand the page content.

In order to achieve this purpose, we need to use some important Meta tags in the page. For example, description, keywords, robots, etc. These tags help search engines quickly determine the topic and quality of the page.

4. Content Quality

When search engine crawlers visit our website, the search engine algorithm will analyze the content of our website, and the search engine will rank the website based on the quantity and quality of the content. Therefore, we need to publish high-quality (original) content on our website to improve search engine rankings. At the same time, we can also use some techniques to optimize the SEO performance of the content, such as:

1. Keyword Density

Insert keywords into the page content (instead of appearing in large numbers in tags) can improve the ranking of that keyword in search results. However, it is important to note that if you overstuff keywords, it may be regarded as spam by search engine algorithms, causing the optimization effect to be counterproductive.

2. External links

External links are an important factor in search engine algorithms to improve the ranking of a website. Using external links to cite your website can improve the quality and credibility of your website, thereby improving your rankings.

3. Number of tags

The number of tags is related to the quality of the content. If there are too few tags on a page, it may be considered low quality by search engine algorithms. On the contrary, if a page has too many tags, it will lower the ranking of the website.

Summarize

In modern web development, JavaScript SPA framework is widely used because it can improve the user experience of the website and has very powerful development functions. However, it also has some SEO optimization problems, such as being unable to be optimized by search engines or being ranked low by search engines. This article provides some tips and practical suggestions for solving SEO problems, which can help us optimize SEO in JavaScript development.

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