Declarative partial updates
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Declarative partial updates is a relevant software architecture topic.
Summary
Chrome 148 introduces Declarative Partial Updates, a set of APIs enabling out-of-order HTML streaming via processing instructions (<?marker>, <?start>/<?end>) and <template for=""> elements, plus new JavaScript APIs for dynamic DOM insertion. These allow replacing placeholder content with templates parsed later, reducing the need for heavy JavaScript frameworks and improving performance. Polyfills are available for non-supporting browsers, and the spec is gaining cross-vendor support.