Zalo: Phát triển Internet thay đổi cuộc sống người Việt Nam

Elements must meet minimum color contrast ratio thresholds

Ensure the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Document should have one main landmark

Ensure the document has a main landmark

Page should contain a level-one heading

Ensure that the page, or at least one of its frames contains a level-one heading

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

Alternative text of images should not be repeated as text

Ensure image alternative is not repeated as text

Alternative text of images should not be repeated as text

Ensure image alternative is not repeated as text

Alternative text of images should not be repeated as text

Ensure image alternative is not repeated as text