Full-document spell checking without slowing down the editor experience.In most cases, you need to find it again. Undo management can be tricky – because of the asynchronous nature of requests, and because pressing undo recreates all the nodes in the document, you can't just "store a reference" to the word you need to add the spelling marker to, because the reference will become stale.There might be no whitespace between things, but if they’re in different blocks, it's the equivalent of whitespace – you can't just rely on text content. Splitting up words by tag boundaries rather than always whitespace.Spelling processes are often asynchronous, which adds complexities and many issues with undo management and cursor management. It's imperative that the cursor position isn't broken when the document is changed by a spelling marker being added. Cursor / selection management – this is more for a content-editable based HTML editor. Some way to perform a spell check across a large document that helps the user know they have no spelling errors left.Responsive as-you-type highlighting so that users can correct a word before they go too far away from it.Providing a clean UI for marking errors and offering suggestions.Handling different numbers of simultaneous suggestions.Menu positioning and general menus for error suggestions, as well as handling edges of the screen.Multi-language support and language attribute boundaries.Skipping spell checking on things that users don't want to spellcheck (links etc.).Handling text fragmentation and inline tag nesting.Properly tokenizing the words for various languages.The server side checks words and sends suggestions back to the client.Įach area has specific functionality requirements.The client side tokenizes content to send it to the server to be checked, and handles UI and DOM interaction.What functionality is crucial to an advanced spell checker?Īn advanced spell checker has both client and server side parts, where: The tool usually consists of two sections: one that allows the spell checker to scan through a block of text and highlight misspelled words, and another that uses an algorithm to compare the words used/typed, with the thousands of correctly spelled words in the dictionary built into the software.īut what’s involved in building a best-in-class, feature rich spell checker? And how much would that cost… versus buying a third-party component and assembling it as part of your tech stack? Let’s find out. In an advanced spell checker, that same benefit spans multiple languages (either within the same document or separate ones), which is a must-have if you’re working within a global market. Its main benefit is its accuracy – it catches and corrects errors. What’s the answer? An advanced spell checker.
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