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todo-list app using vue.js in 100 lines of code (create, read, update, delete todo list using local storage)
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<!DOCTYPE html> | |
<html> | |
<head> | |
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> | |
<style> | |
.done { | |
text-decoration: line-through | |
} | |
</style> | |
</head> | |
<body> | |
<div id="app"> | |
<todo-input :todos="todos"></todo-input> | |
<todo-item v-for="(todo, index) in todos" :index="index" :todo="todo" :todos="todos" :key="index"></todo-item> | |
</div> | |
<script type="text/javascript"> | |
Vue.component('todo-item', { | |
props: ['todo', 'index', 'todos'], | |
template: | |
`<li> | |
<input type="checkbox" v-if= "!todo.isEdit" @change="toggleDone(todo)" :checked="todo.isDone" /> | |
<label v-if="!todo.isEdit" :class="{ done: todo.isDone }">{{ todo.title }}</label> | |
<input v-if="todo.isEdit" type="text" v-model="editedTodoTitle" v-on:keyup.enter="editTodo(index, todos)" /> | |
<button v-if="!todo.isEdit" @click="toggleEditTodo(index, todos)">edit</button> | |
<button @click="delTodo(index, todos)">delete</button> | |
</li>`, | |
methods: { | |
toggleDone: function(todo){ | |
todo.isDone = !todo.isDone; | |
}, | |
delTodo: function(index, todos){ | |
if (index > -1){ | |
todos.splice(index, 1); | |
} | |
}, | |
editTodo: function(index, todos){ | |
if (this.editedTodoTitle && this.editedTodoTitle.replace(/\s/g, '').length > 0){ | |
todos[index].title = this.editedTodoTitle; | |
}else{ | |
this.editedTodoTitle = ''; | |
} | |
todos[index].isEdit = false; | |
}, | |
toggleEditTodo: function(index, todos){ | |
todos[index].isEdit = true; | |
this.editedTodoTitle = todos[index].title; | |
}, | |
}, | |
data: function () { | |
return { | |
editedTodoTitle: '', | |
} | |
}, | |
}); | |
Vue.component('todo-input', { | |
props: ['todos'], | |
template: | |
`<div> | |
<input type="text" placeholder="new todo" v-model="newTodoTitle" v-on:keyup.enter="addTodo(todos)" /> | |
<button v-on:click="addTodo(todos)" >add</button> | |
<button v-on:click="clearAllTodos(todos)" :disabled="todos.length < 1">clear all</button> | |
</div>`, | |
data: function () { | |
return { | |
newTodoTitle: '', | |
} | |
}, | |
methods: { | |
addTodo: function(todos){ | |
if (this.newTodoTitle && this.newTodoTitle.replace(/\s/g, '').length > 0){ | |
todos.push({ title: this.newTodoTitle, isDone: false, isEdit: false}); | |
this.newTodoTitle = ''; | |
} | |
}, | |
clearAllTodos: function(todos){ | |
while(todos.length > 0){ | |
todos.pop(); | |
} | |
localStorage.removeItem('vue-demo-app-todo-list'); | |
}, | |
}, | |
}); | |
var app = new Vue({ | |
el: '#app', | |
data: { | |
todos:[], | |
}, | |
watch: { | |
todos: function(){ | |
localStorage.setItem('vue-demo-app-todo-list', JSON.stringify(this.todos)); | |
} | |
}, | |
mounted: function(){ | |
this.todos = localStorage.getItem('vue-demo-app-todo-list') ? JSON.parse(localStorage.getItem('vue-demo-app-todo-list')) : []; | |
}, | |
}) | |
</script> | |
</body> | |
</html> |
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