Dynamic links refer to links in web pages that crawlers cannot recognize. The crawler's link extractor cannot extract all links from the web page, because some may be stored in a specific format (such as JavaScript), and the link extractor cannot decode this format. The format of this link directly affects the number of pages crawled by the crawler. One type of dynamic link is described below.
Links on the early web had a simple format. They must begin with and end with. Quote tags are optional and spaces can be inserted, but a crawler only needs to look for "
Barriers to efficient traversal include not only JavaScript but also Java and Shockwave. Website designers need to pay attention: if they want their site to be accessed by commercial search engine crawlers, they must ensure that there are enough "standard" links (i.e. HTML links) in the designed web pages.
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