How does QueryList elegantly handle the problem of inconsistency in label case in web page meta information?

QueryList efficiently collects website meta information: cleverly solves case differences

During the process of web page data collection, inconsistent case of HTML tags is a common problem, especially when extracting meta information on the head of the website.<meta> The case of label attribute names may vary greatly. This article will introduce how to use QueryList to efficiently solve this problem and achieve consistency in cross-site meta information collection.

Problem: Many websites have different cases of Meta information label attribute names, some are uppercase, some are lowercase, and even mixed cases. How to use QueryList to ensure consistency of acquisition results?

Solution: QueryList itself does not provide configurations that directly ignore case. But we can solve it by preprocessing HTML code. Before using QueryList to extract data, convert all tags and attribute names in the HTML code to uniform upper and lower case (for example, all to lower case). This method can effectively eliminate the impact of case differences and ensure that QueryList can always accurately extract target information. Integrating preprocessing steps into the data collection process can easily deal with the differences in HTML codes of different websites and ensure the consistency of the collection results.

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