Whether you really have to bring it down to zero is another discussion, as over obsessing with certain issues can be a costly thing to do.
Having hundreds of validation errors is not usually a sign of code quality, so trying to keep the number of errors, hard or soft, down is usually a good idea. W3C validation is a very easy way to catch coding errors like that and thus it makes debugging and continued development of HTML a lot easier. Just about any unclosed element that should be closed and is not can cause you to look at styling issues for far too long. There are two types of validation errors in my opinion: there are errors that break or hamper rendering, which I’ll refer to as hard validation errors, and there are validation errors that don’t cause rendering issues, which I’ll refer to as soft validation errors.Īn example of a hard validation error: an unclosed anchor – – tag.
We’ll have a look at the pros and cons of W3C and web design first, before we dive into the SEO aspects. Since I’ve taken it upon me to create articles for each question that I’ve answered more than once, let’s have a look at the pros and cons of W3C validation. Most of them ask even more specifically: whether I think W3C validation is important for SEO. The people emailing me either point me at the fact that my own site doesn’t validate correctly (thank Facebook for most of that), or they ask me whether I think W3C Validation is important.
Server side validation is performed by a web server, after input has been sent to theĬlient side validation is performed by a web browser, before input is sent to a web server.Every once in a while I get an email about W3C validation. Validation can be defined by many different methods, and deployed in many Most often, the purpose of data validation is to ensure correct user input. has the user entered text in a numeric field?.has the user filled in all required fields?.JS References JavaScript Objects HTML DOM ObjectsĪutomatic HTML form validation does not work in Internet Explorer 9 or earlier.ĭata validation is the process of ensuring that user input is clean, JS Examples JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Certificate JS Graphics JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.js JS vs jQuery jQuery Selectors jQuery HTML jQuery CSS jQuery DOM JS JSON JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON Server JSON PHP JSON HTML JSON JSONP JS AJAX AJAX Intro AJAX XMLHttp AJAX Request AJAX Response AJAX XML File AJAX PHP AJAX ASP AJAX Database AJAX Applications AJAX Examples JS Web APIs Web API Intro Web Forms API Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API JS Browser BOM JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies JS HTML DOM DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists JS Async JS Callbacks JS Asynchronous JS Promises JS Async/Await
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