How can you ensure cross-browser compatibility when parsing HTML?

3 Use feature detection and polyfills

The third step to ensure cross-browser compatibility when parsing HTML is to use feature detection and polyfills when using new or experimental HTML features. Feature detection is a technique that checks if the browser supports a specific feature before using it, and provides a fallback or alternative solution if it does not. Polyfills are scripts that emulate or implement the missing feature in older or incompatible browsers. You can use libraries like Modernizr or Babel to perform feature detection and polyfilling for your web page.

4 Use a CSS reset or normalize

The fourth step to ensure cross-browser compatibility when parsing HTML is to use a CSS reset or normalize stylesheet. A CSS reset or normalize stylesheet is a set of CSS rules that removes or standardizes the default styles and margins that browsers apply to HTML elements, such as headings, paragraphs, lists, and so on. This helps to create a consistent and clean canvas for your web page design, and avoids any unwanted or unexpected differences in layout or appearance across browsers. You can use popular CSS reset or normalize stylesheets like Eric Meyer's Reset CSS or Nicolas Gallagher's Normalize.css.

5 Test and debug across browsers

The fifth step to ensure cross-browser compatibility when parsing HTML is to test and debug your web page across different browsers and devices. Testing and debugging is the process of finding and fixing any errors or issues that may affect your web page performance, functionality, or user experience. You can use tools like BrowserStack or LambdaTest to test and debug your web page on various browsers, platforms, and screen sizes. You can also use tools like DevTools or Firebug to inspect and modify your HTML code and DOM elements in real time.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?