I wanted to create a simple todo list in vue.js
to get myself comfortable with it.
Now, I have placed a remove button after each item. For that purpose, I have added a remove()
function in javascript with a parameter id
which is the id of the todo list item as well as onclick
attribute with the button. But the problem is I cannot find a way to pass item (loop variable created using v-for) id
as a parameter to remove()
function inside onclick
attribute.
So, far my script looks like this...
HTML
...
<ul>
<li v-for="item in items">
{{ item.label }}
<input type="button" value="x" onclick="app.remove(item.id)">
<!-- item.id does not work -->
</li>
<li>
<input type="text" v-model="new_item" onkeypress="app.input_keydown(event)">
<input type="submit" value="+ Add" onclick="app.add()">
</li>
</ul>
...
JS
...
data: {
items: [
{id: 1, label: "One"},
{id: 2, label: "Two"},
{id: 3, label: "Three"},
{id: 4, label: "Four"},
],
add: function() {
// let item = prompt("Add Item", "New Item");
if (app.new_item) {
app.items.push(app.new_item);
}
},
remove: function(id) {
for (index in app.items) {
if (app.items[index].id == id) {
app.items.splice(index, 1);
}
}
},
}
...
And my simple todo list looks like this...
Also, I would like to know if in case I have to pass a loop variable in any HTML attribute, how would I do that?
you have to use Vue.js special event handlers instead of html one. onclick="app.remove(item.id)"
should be @click="remove(item.id)"
.
also you have to extract add
and delete
methods to methods
property. They can not be in data
.
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