The Next Big Thing

Adam L Barrett

UI = f(state)

Could we still program in a state driven manner without all the VDOM indirection in the middle?

Svelte adjective

Definition of svelte

  1.  SLENDER, LEAN, LITHE
    • having clean lines
    • SLEEK
  2. URBANE, SUAVE

How it works

<h1>Hello {name}!</h1>
{
  "type": "Element",
  "name": "h1",
  "children": [
    { 
      "type": "Text", "raw": "Hello ", "data": "Hello "
    },
    { 
      "type": "MustacheTag", "expression": {
        "type": "Identifier",
        "name": "name"
      }
    },
    { 
      "type": "Text", "raw": "!", "data": "!"
    }
  ]
}
function instance($$self, $$props, $$invalidate) {
  let { name = 'world' } = $$props;
  $$self.$set = $$props => {
    if ('name' in $$props) {
      $$invalidate('name', (name = $$props.name));
    }
  };
  return { name };
}

HTML

AST

JS

How it works

const app = new App({
  target: document.body,
  props: {
    answer: 42
  }
});

Demo

Why should I care?

The BIG reason...?

Potential

Some things are Ahead of their time

...as long as there are Source Maps


model.set('property', value)
model.get('property')

model.property = value
model.property

💡

Questions?

The Next Big Thing

Svelte: The Next Big Thing

By Adam L Barrett

Svelte: The Next Big Thing

I’m going to tell you about Svelte, the web framework that is going to change thee way we develop for the web. I’ll talk about why it’s great, what makes it different, and why Svelte is going to be the “next big thing” for the web.

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