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HTML error of multiple attribute for input type="text" with Rails datagrid gem...


htmlruby-on-railsdatagridw3c-validation

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What elements can a span tag contain in HTML5?...


htmlw3c-validationweb-standards

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W3C HTML validation error - Section lacks heading. Consider using h2-h6 elements to add identifying ...


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Are (non-void) self-closing tags valid in HTML5?...


htmlsyntaxw3c-validation

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Should I remove trailing slashes in meta tags?...


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Convert read only fields for accessibility purposes...


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Why can frontend frameworks can create custom attributes but I'm expected to prepend "data-...


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Adding ID attribute to all HTML elements of a web application?...


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How do I fix "Error: A charset attribute on a meta element found after the first 512 bytes.&quo...


htmlw3c-validation

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Is it necessary to have <tbody> in every table?...


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There is no attribute "allowtransparency" ...


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W3C Validator offline on localhost by ajax...


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W3C validator, CSS3 and Bootstrap...


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html 5 marquee tag error in w3c validation...


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HTML Email Validation?...


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Help with HTML validation error: Table column has no cells beginning in it...


htmlvalidationw3c-validation

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Is it invalid HTML to write "&" by itself? Why?...


htmlstandardsw3c-validation

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"The frameborder attribute on the iframe element is obsolete. Use CSS instead."...


htmliframew3c-validation

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W3C validator gives 'document type does not allow element "input" here...' error f...


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How do you proceed html markup validation in your svelte app?...


htmlsveltew3c-validation

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Are multiple angle brackets valid in HTML?...


htmlw3c-validation

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What is the use of using semantic markup in HTML writing?...


htmlw3c-validationsemantic-markup

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What's a minimally valid HTML5 document?...


htmlvalidationw3c-validation

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W3C Validation: Ordered List element inside Label...


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'charset=iso-8859-1' with <!DOCTYPE HTML> is throwing a warning...


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Valid XHTML error - <div> is not allowed in <a>...


htmlxhtmlw3c-validation

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How can I use strings for the rel attribute?...


htmlw3c-validationrel

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HTML validation in a multipage jquery mobile app...


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AngularJS app not passing official W3C HTML5 validation...


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Validation error: ul not allowed as child of element span...


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