[QUESTION] About templating

Supposed to have a set of AE animations, is there any way to load them a template engine so that expressions can be handled at run time?

According to the docs I could start using TextLayer.updateDocumentData to update the text at run time: https://github.com/airbnb/lottie-web/wiki/TextLayer.updateDocumentData

So assumed to have a text animation, I would use an expression to change the text, while using the same animation template.

[loretoparisi]

@bodymovin thank you I was thinking to a common parser api to traverse the animationData instead of modifying “by hand”, so that to avoid any possibile typos or unsupported changes for a certain object type, like modifying a TextLayer manually etc.

I will have a look at the api then. In the meanwhile I have put the ongoing project here: https://github.com/loretoparisi/lottie-adobe-after-effects-json-animation

In this example I would like to change animation speed as well:

anim.renderer.elements[0].updateDocumentData({
            t: 'This is keyframe 0', 
            s: 78, 
            fc: Palette.color() 
        }, 0);
        anim.renderer.elements[0].updateDocumentData({
            t: 'This is keyframe 1', 
            s: 78, 
            fc: Palette.color() 
        }, 1);

(https://github.com/loretoparisi/lottie-adobe-after-effects-json-animation/blob/master/js/app.js#L252)

Using the TextLayer.updateDocumentData I can change the keyframes 💯 , but how about other properties, can do this with the lottie-api?

Thank you!

[bodymovin]

Yes, the best approach is to load the animationData, traverse it to find the properties you want to update, and then pass it to lottie. If you want to update the properties after the animation has been loaded, you can use the lottie-api library https://github.com/bodymovin/lottie-api