可思分享 | 網站SEO優化《可思科技 CodePulse》

2022/10

Links Must Have Discernible Text

Fix all of the following: Element is in tab order and does not have accessible text Fix any of the following: Element does not have text that is visible to screen readers aria-label attribute does not exist or is empty aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty Element has no title attribut

SEO專家 Vince Wu

2022/10

Form Elements Must Have Labels

Fix any of the following: Form element does not have an implicit (wrapped) <label> Form element does not have an explicit <label> aria-label attribute does not exist or is empty aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty Element has no title attribute Element has no placeholder attribute Element's default semantics were not overridden with role="none" or role="presentation"

SEO專家 Vince Wu

2022/10

JavaScript files are blocking page rendering.

By default, references to external JavaScript files will block the page from rendering while they are fetched and executed. Often, these files can be loaded in a different manner, freeing up the page to visually render sooner.

SEO專家 Vince Wu

JavaScript files are blocking page rendering.

2022/10

Images Must Have Alternate Text

SEO專家 Vince Wu

2022/10

IDs Of Active Elements Must Be Unique

SEO專家 Vince Wu

2022/10

Elements Must Have Sufficient Color Contrast

SEO專家 Vince Wu

Elements Must Have Sufficient Color Contrast

2022/10

The main thread was blocked

When files block the main thread, users are unable to interact with the page content. Typically, parsing and executing large JavaScript files, as well as running long JavaScript tasks can block the main thread and should be avoided. These files had high thread blocking times:

SEO專家 Vince Wu