Vue

by flek

HTML

<div id="app">
  <input
    type="text"
    placeholder="what needs to be done?"
    v-on:keydown="keydownHandler"
  />
  <h2>Todos:</h2>
  <ol>
    <li v-for="todo in todos" :key="todo">
      <label>
        <input
          type="checkbox"
          v-on:change="check(todo)" />
        {{ todo }}
        <button v-on:click="remove(todo)">remove</button>
      </label>
    </li>
  </ol>
  <h2>Dones:</h2>
  <ol>
    <li v-for="done in dones">
      <del>{{ done }}</del>
    </li>
    <button v-if="dones.length" v-on:click="clear">clear</button>
  </ol>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

// Application code
const state = {
	todos: [],
  dones: [],
};

function keydownHandler(event) {
  if (event.key === 'Enter') {
    add(event.target.value);
    event.target.value = '';
  }
}

function add(todo) {
  state.todos = [todo, ...state.todos];
}

function remove(todo) {
  state.todos = state.todos.filter(t => t !== todo);
}

function check(todo) {
  remove(todo);
  state.dones = [...state.dones, todo];
}

function clear() {
  state.dones = [];
}

new Vue({
  el: "#app",
  data: state,
  methods: {
	  keydownHandler,
  	add,
  	remove,
  	check,
    clear
  }
})