MagJS ~ Modular Application Glue

npm i mag.js

Super FAST Simple Intuitive JS2HTML Templating Component Library

import Mag from "mag.js"

// 1. Define Component:
const Counter = Mag(
  function (props) {

  const handler = () => 
    // Render Component Event:
    Counter({ count: props.count + 1 });
  
  // MagJS Tag Template:
  return Mag`
   <p>
      You clicked 
      ${props.count} times
    </p>
    <button onClick=${handler}>
      Click me
    </button>`
})

// 2. Render Component:
Mag(
  Counter({ count: 0 }),
  document.getElementById("root")
)

Try the demo on CodePen → With useState → With Component Template → With Component Container →

CodePen Examples

Codesandbox template

Video examples

Old readme

Browser install

Default includes ONLY Stateless Components WITH Hooks (useState, useEffect, useContext)

<script src="//unpkg.com/mag.js"></script>

Alternate browser options

State and Stateless Components WITHOUT Hooks

<script src="//unpkg.com/mag.js/dist/mag.min.js"></script>

State and Stateless Components WITH Hooks

<script src="//unpkg.com/mag.js/dist/mag.hooks.min.js"></script>

Only stateless Components WITHOUT useState, useEffect, useContext Hooks

<script src="//unpkg.com/mag.js/dist/mag-stateless.min.js"></script>

API

Render

//Renders, returns nothing
Mag (
  Node | HtmlString,
  Node | querySelector
)

Component

//Define, returns Render Function:
const Function = Mag (
  // Optional
  [Node | HtmlString | querySelector], 
  Function = [props =>
      ObjectElementMap | 
      HtmlString | 
      Null
     ]
)

//Call with optional Props and Render:
const Node = Function (props)

const HelloMessage = Mag(props => {
  return `
    <div>
      Hello ${props.name}
    </div>
    `
})

Mag(
 HelloMessage({name: "Taylor"}),
 document.getElementById('root')
)

Tag

const Node = Mag`<HTMLString>`

const Node = Mag`
  <button 
    onClick="${e=>console.log(e)}">
    Clicker!
  </button>`

Mag(Node, document.body)

Tag Component

var Button = Mag(
  '<button>',
  props => {
    onClick: props.handler
  }
)

Mag(
  Mag`<Button 
    handler=${e=>console.log(e)}>`,
  "root"
)

Hooks

//Per component
const [state, setState] = 
  Mag.useState(
    initialState
)

Mag.useEffect(() => {
  // on didUpdate
  return () => {
    // onUnload
  }
}, [] //optional depedencies
)

//Across Components
const [context, setContext] = 
  Mag.useContext(
    StringName,
    initialContext // Optional
)

Rendering Examples

Render to Live Node no return Function:

Mag(
  "<h1>Hello!</h1>",
  document.getElementById("root")
   // or just: "root"
)

Attach to Live Node with return Function to render:

const App = Mag(
    document.body,
    (props) =>
      `<h1>${props.name}!</h1>`
)
//Renders:
App({name: "Mike"})

Attach to HtmlString

const Welcome = Mag(
  "<h1>",
  ({name}) => {
    return `Hello, ${name}!`
  }
)
//Renders Node:
Welcome({name: "Michael"})

Attach Component to live Node

Mag(
  Welcome({name: "Michael"}),
  document.getElementById("root")
)

Attach Component to another Component

//Container: 
const Container = Mag(
  "<div>", 
  (props) => {
    return {
      _class: "container " + 
        props.classNames + 
        props.count
    }
})

//Component:
var Counter = Mag(
  Container({ classNames: "extra" }),
  ({ count }) => {
  const handler = () => {
    Counter({ count: count + 1 })
    Container({ count: count + 1 })
  };

  return Mag`
   <p>
      You clicked 
      ${count} times
    </p>
    <button 
      onClick=${handler}>
      Click me
    </button>`
})

//Render:
Mag(
  Counter({ count: 0 }),
  document.getElementById("root")
)

Dynamic Tag Component

var HelloMessage = props => {
  return `
    <div>
      Hello ${props.name}
    </div>
    `
}

Mag(
 mag`<${HelloMessage} name=Taylor>`,
 document.getElementById('root')
)

With Children

  const Message = props => {
    return props.children;
  };

  const HelloMessage = props => {
    return mag`
      <${props.Message}>
        Hello ${props.name}
      <//>
      `;
  };

  Mag(
    mag`<${HelloMessage} 
      name="Taylor" 
      Message=${Message}
      >`,
    document.getElementById('root')
  )

Hooks Examples

const App = Mag(
  "root",
  (props) => {
    const [count, setCount] = 
      Mag.useState(props.count)

    return {
      _html: `<button>
        Counter!</button>
        <h1>Current Count:
        <count/>`,
      count,
      button: {
        onClick: () 
        => setCount(count + 1)
      }
    }
})

App({ count: 0 })

magnumjs / mag.js