This is actually what we are doing at maskjs. Here the flow is: Template ➝ AST ➝ DOM. When the builder creates DOM nodes, it notices all observable expressions and the render context, and when later the new value arrives it changes only one part of the changed DOM.
h1 {
'~[observe user.name]'
}
And when the name is changed, e.g. user.name = "Foo", only textContent of the Element h1 is changed. Such approach is indeed much faster. But, if you have a huge template, a UserPage for example, and want to apply a new user model to show, which leads to dozens of such in-DOM changes, it could hurt performance. Also for VDOM. For this scenario the container DOM Element should be detached from the Live DOM, modified, and then reattached. But in most cases it can be even faster just to drop old Container Element, and to re-render the Template.
Really cool MVC project, seems undervalued and needs more attention haha. I think you have a misunderstanding of how vdom works - vdom would diff changes then apply pinpoint changes to the DOM. Whether it's faster to diff or drop and rerender the template I'm not sure about since all the jsperf links on your project are broken
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This is actually what we are doing at
maskjs. Here the flow is: Template ➝ AST ➝ DOM. When the builder creates DOM nodes, it notices all observable expressions and the render context, and when later the new value arrives it changes only one part of the changed DOM.And when the
nameis changed, e.g.user.name = "Foo", onlytextContentof the Elementh1is changed. Such approach is indeed much faster. But, if you have a huge template, a UserPage for example, and want to apply a new user model to show, which leads to dozens of such in-DOM changes, it could hurt performance. Also forVDOM. For this scenario the container DOM Element should be detached from the Live DOM, modified, and then reattached. But in most cases it can be even faster just to drop old Container Element, and to re-render the Template.Really cool MVC project, seems undervalued and needs more attention haha. I think you have a misunderstanding of how vdom works - vdom would diff changes then apply pinpoint changes to the DOM. Whether it's faster to diff or drop and rerender the template I'm not sure about since all the jsperf links on your project are broken