CSS HTML Validator vs. HTML Email Check vs. Perl vs. Slate Comparison Chart

HTML Email Check includes all the tools developers need to create, check and validate their HTML emails with, including instant validation results, an integrated HTML editor, layout viewer, and email sending. Validation of the HTML markup, structure, and client-specific tags. Validation of CSS formatting, inline CSS, and client-specific styling. Validation of font types, web fonts, and client-specific styling. Checking of image sources, dimensions, and attributes. Checking for working URL's, special links, and attributes. Layout and HTML structure testing on non client-specific devices. Send up to 10 test emails at a time directly to your inbox. Covering important aspects your email should include before sending. Every day is different and sometimes you need to react quickly to a certain situation or last-minute changes.

Slate is a completely customizable framework for building rich text editors. Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Google Docs, which are becoming table stakes for applications on the web, without your codebase getting mired in complexity. It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what is or isn't in "core". You can think of it like a pluggable implementation of contenteditable built on top of React. It was inspired by libraries like Draft.js, Prosemirror and Quill. Slate is currently in beta. Its core API is usable now, but you might need to pull request fixes for advanced use cases. Some of its APIs are not "finalized" and will (breaking) change over time as we find better solutions. The most important part of Slate is that plugins are first-class entities.