問(wèn)題是你寫的是被評(píng)估false為的字符串，你應(yīng)該知道空字符串、值和被評(píng)估為，反之亦然"false"true''0nullundefinedfalse
在此處了解有關(guān)類型強(qiáng)制的更多信息
let app = new Vue({
el: "#app",
data() {
return {
newTodo: "",
type: "",
important: "",
id: 3,
todo: [{
id: 1,
title: "Fist Task",
completed: false,
editing: "false",
type: "urgent",
},
{
id: 2,
title: "Second Task",
completed: false,
editing: "false",
type: "important",
},
],
};
},
methods: {
addTask() {
if (this.newTodo.trim().length == 0) {
return;
}
this.todo.push({
id: this.id,
title: this.newTodo,
completed: "false",
editing: "false",
type: this.type,
});
this.id++;
this.newTodo = "";
},
removeTask(index) {
this.todo.splice(index, 1);
},
completeTask(task) {
task.completed = event.target.checked;
},
},
directives: {
focus: {
inserted: function(el) {
el.focus();
},
},
},
})
* {
margin: 0px;
box-sizing: border-box;
}
.removeTask {}
.completed {
text-decoration: line-through;
}
.task {
text-decoration: 0;
}
/*
.conteiner {
display: flex;
} /*
.todoBox {
width: 50%;
height: 50vh;
border: 1px solid black;
text-align: center;
}
.todoList {
width: 100%;
height: 100%;
border: 1px solid red;
}
*/
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<div class="conteiner">
<input placeholder="what we do ?" type="text" v-model="newTodo" />
<button @click="addTask()">Add</button>
<select v-model="type">
<option disabled value="">Select</option>
<option value="urgent">Urgent</option>
<option value="noturgent">Not Urgent</option>
<option value="important">Important</option>
<option value="notimportant">Not Important</option>
</select>
<div class="todoBox">
<h2>Urgent</h2>
<div class="todoList" v-for="(task, index) in todo">
<div>
<div v-if="task.type == 'urgent'">
<input v-model="task.completed" type="checkbox" name="" id="" @change="completeTask(task)" />
<div class="task" v-bind:class="{ completed: task.completed }">
{{ task.title }}
</div>
<button class="removeTask" @click="removeTask(index)">X</button>
</div>
</div>
</div>
</div>
<div class="todoBox">
<h2>Not Urgent</h2>
<div class="todoList" v-for="(task, index) in todo" :key="task.id">
<div>
<div v-if="task.type == 'noturgent'">
<input v-model="task.completed" type="checkbox" name="" id="" @change="completeTask(task)" />
<div class="task" v-bind:class="{ completed: task.completed }">
{{ task.title }}
</div>
<button class="removeTask" @click="removeTask(index)">X</button>
</div>
</div>
</div>
</div>
<div class="todoBox">
<h2>Important</h2>
<div class="todoList" v-for="(task, index) in todo" :key="task.id">
<div>
<div v-if="task.type == 'important'">
<input v-model="task.completed" type="checkbox" name="" id="" @change="completeTask(task)" />
<div class="task" v-bind:class="{ completed: task.completed }">
{{ task.title }}
</div>
<button class="removeTask" @click="removeTask(index)">X</button>
</div>
</div>
</div>
</div>
<div class="todoBox">
<h2>Not Important</h2>
<div class="todoList" v-for="(task, index) in todo" :key="task.id">
<div>
<div v-if="task.type == 'notimportant'">
<input v-model="task.completed" type="checkbox" name="" id="" @change="completeTask(task)" />
<div class="task" v-bind:class="{ completed: task.completed }">
{{ task.title }}
</div>
<button class="removeTask" @click="removeTask(index)">X</button>
</div>
</div>
</div>
</div>
</div>
</div>
