just.js

A small data binding library. Nothing more, nothing less.

###Usage Load just.js via a script tag.

<script type="text/javascript" src="just.js"></script>

Define your HTML view.

<div class="todo">
    <input class="todo-status" type="checkbox">
    <span class="todo-text"></span>
</div>
<form class="new-todo">
    <input class="next-todo-text" type="text">
    <button class="add-todo">add todo</button>
</form>

Define data.

Just.data({
    todos: {
        next: '',
        list: ['stay calm', 'return stapler']
    }
})

Describe bindings using classes names, dot-notation, and decorators.

Just.with('todo')
    .each('todos.list.');
    
Just.with('todo-text')
    .each('todos.list.');
    
Just.with('todo-status')
    .each('todos.list')
    .each('todos.list.')
    .call(function status(val, key) {
        return function(el) {
          el.checked = false;
          el.onchange = function() { val[0].splice(key[1], 1) };
        }
    });
    
Just.with('next-todo-text')
    .each('todos.next')
    .call(function text(val, key) {
        return function(el) {
            el.oninput = function() { val[0] = el.value };
            if (document.activeElement !== el) el.value = val[0];
        }
    });
    
Just.with('add-todo')
    .each('todos.list')
    .each('todos.next')
    .call(function addButton(val) {
        return function(el) {
            el.onclick = function() { 
                val[0].push(val[1]);
                Just.render();
            };
        }
    });

###Guiding Principles

just.js only supports browsers with >1% ussage according to caniuse.com.
100% of just.js's code is exercised by every page where it is used.
just.js doesn't require any third-party-fameworks.
just.js doesn't require any special HTML markup.

nelsonomuto/just.js

just.js