Created
January 23, 2015 11:51
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VirtualDOMのハンズオン:index.html(要素を追加&削除するサンプル)
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<!DOCTYPE html> | |
<html xmlns="http://www.w3.org/1999/xhtml"> | |
<head> | |
<script src="virtualdom.js"></script> | |
<title></title> | |
</head> | |
<body> | |
<div> | |
<input type="text" name="todo" /> | |
<button name="add" type="button">add</button> | |
</div> | |
<div class="list"></div> | |
<script> | |
var todos = []; | |
var textBox = document.querySelector("[name=todo]"); | |
document.querySelector("[name=add]").addEventListener("click", function() | |
{ | |
var todoText = textBox.value; | |
todos.push(todoText); | |
applyTodosVDom(todos); | |
}, false); | |
function applyTodosVDom(todolist) | |
{ | |
var newTextVDOM = createVDom(todolist); //--- 新しいVirtual DOMを作る | |
var patch = virtualDom.diff(todoVDOM, newTextVDOM); //--- パッチを作る | |
todoNode = virtualDom.patch(todoNode, patch); //--- パッチ適用 | |
todoVDOM = newTextVDOM; | |
} | |
function createVDom(todolist) | |
{ | |
var textVDoms = todolist.map(function(todo, index) | |
{ | |
return virtualDom.h("div", {}, [ | |
virtualDom.h("button", | |
{ | |
onclick: function() | |
{ | |
todolist.splice(index, 1); | |
applyTodosVDom(todolist); | |
} | |
}), | |
virtualDom.h("span", {}, todo), | |
]); | |
}); | |
return virtualDom.h("div", {}, textVDoms); | |
} | |
var todoVDOM = createVDom(todos); //--- VirtualDOM作成 | |
var todoNode = virtualDom.create(todoVDOM); //--- DOM作成 | |
document.querySelector(".list").appendChild(todoNode); //--- DOMツリーに追加 | |
</script> | |
</body> | |
</html> |
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