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diff --git a/files/ko/web/javascript/reference/global_objects/object/observe/index.html b/files/ko/web/javascript/reference/global_objects/object/observe/index.html new file mode 100644 index 0000000000..bf3b004d8c --- /dev/null +++ b/files/ko/web/javascript/reference/global_objects/object/observe/index.html @@ -0,0 +1,193 @@ +--- +title: Object.observe() +slug: Web/JavaScript/Reference/Global_Objects/Object/observe +tags: + - 감시 객체 +translation_of: Archive/Web/JavaScript/Object.observe +--- +<div>{{JSRef}}</div> + +<p><strong><code>Object.observe()</code></strong> 메소드는 객체의 변화를 비동기로 감시하는데에 사용된다. 이 메소드는 변화들이 발생한 순서대로 그 흐름을 제공한다.</p> + +<h2 id="문법">문법</h2> + +<pre class="syntaxbox"><code>Object.observe(<var>obj</var>, <var>callback</var>[, <var>acceptList</var>])</code></pre> + +<h3 id="파라미터">파라미터</h3> + +<dl> + <dt><code>obj</code></dt> + <dd>감시될 객체입니다.</dd> + <dt><code>callback</code></dt> + <dd><code>obj</code>의 변경이 일어났을 때마다 호출될 함수입니다. 다음과 같은 인자를 갖습니다. + <dl> + <dt><code>changes</code></dt> + <dd>변경 사항을 나타내는 객체의 배열입니다. 그 객체의 프로퍼티는 다음과 같습니다. + <ul> + <li><strong><code>name</code></strong>: 변경된 프로퍼티의 이름입니다.</li> + <li><strong><code>object</code></strong>: 변경이 일어난 뒤의 객체입니다.</li> + <li><strong><code>type</code></strong>: 변경의 종류를 의미하는 string입니다. <code>"add"</code>, <code>"update"</code>, <code>"delete"</code> 중 하나입니다.</li> + <li><strong><code>oldValue</code></strong>: 변경되기 이전의 값입니다. <code>"update"와</code> <code>"delete"</code> 타입에만 존재합니다.</li> + </ul> + </dd> + </dl> + </dd> + <dt><code>acceptList</code></dt> + <dd>감시할 변경의 종류를 의미하는 리스트입니다. 주어지지 않은 경우, 배열 <code>["add", "update", "delete", "reconfigure", "setPrototype", "preventExtensions"]</code> 이 이용될 것입니다.</dd> +</dl> + +<h2 id="설명">설명</h2> + +<p><code>callback</code>은 <code>obj</code>에 변경이 있을 때마다 실행되며, 모든 변경 사항이 일어난 순서대로 담긴 배열이 전달됩니다.</p> + +<h2 id="예제">예제</h2> + +<h3 id="Logging_all_six_different_types">Logging all six different types</h3> + +<pre class="brush: js">var obj = { + foo: 0, + bar: 1 +}; + +Object.observe(obj, function(changes) { + console.log(changes); +}); + +obj.baz = 2; +// [{name: 'baz', object: <obj>, type: 'add'}] + +obj.foo = 'hello'; +// [{name: 'foo', object: <obj>, type: 'update', oldValue: 0}] + +delete obj.baz; +// [{name: 'baz', object: <obj>, type: 'delete', oldValue: 2}] + +Object.defineProperty(obj, 'foo', {writable: false}); +// [{name: 'foo', object: <obj>, type: 'reconfigure'}] + +Object.setPrototypeOf(obj, {}); +// [{name: '__proto__', object: <obj>, type: 'setPrototype', oldValue: <prototype>}] + +Object.seal(obj); +// [ +// {name: 'foo', object: <obj>, type: 'reconfigure'}, +// {name: 'bar', object: <obj>, type: 'reconfigure'}, +// {object: <obj>, type: 'preventExtensions'} +// ] +</pre> + +<h3 id="데이터_바인딩">데이터 바인딩</h3> + +<pre class="brush: js">// A user model +var user = { + id: 0, + name: 'Brendan Eich', + title: 'Mr.' +}; + +// Create a greeting for the user +function updateGreeting() { + user.greeting = 'Hello, ' + user.title + ' ' + user.name + '!'; +} +updateGreeting(); + +Object.observe(user, function(changes) { + changes.forEach(function(change) { + // Any time name or title change, update the greeting + if (change.name === 'name' || change.name === 'title') { + updateGreeting(); + } + }); +}); +</pre> + +<h3 id="Custom_change_type">Custom change type</h3> + +<pre class="brush: js">// A point on a 2D plane +var point = {x: 0, y: 0, distance: 0}; + +function setPosition(pt, x, y) { + // Performing a custom change + Object.getNotifier(pt).performChange('reposition', function() { + var oldDistance = pt.distance; + pt.x = x; + pt.y = y; + pt.distance = Math.sqrt(x * x + y * y); + return {oldDistance: oldDistance}; + }); +} + +Object.observe(point, function(changes) { + console.log('Distance change: ' + (point.distance - changes[0].oldDistance)); +}, ['reposition']); + +setPosition(point, 3, 4); +// Distance change: 5 +</pre> + +<h2 id="Specifications">Specifications</h2> + +<p><a href="https://github.com/arv/ecmascript-object-observe">Strawman proposal for ECMAScript 7</a>.</p> + +<h2 id="브라우저_호환성">브라우저 호환성</h2> + +<div>{{CompatibilityTable}}</div> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatChrome("36")}}</td> + <td>{{CompatNo}} [1]</td> + <td>{{CompatNo}} [2]</td> + <td>{{CompatOpera("23")}}</td> + <td>{{CompatNo}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Chrome for Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatNo}}</td> + <td>{{CompatChrome("36")}}</td> + <td>{{CompatNo}} [1]</td> + <td>{{CompatNo}} [2]</td> + <td>{{CompatOpera("23")}}</td> + <td>{{CompatNo}}</td> + </tr> + </tbody> +</table> +</div> + +<p>[1]: See {{bug(800355)}}</p> + +<p>[2]: See relevant <a href="https://dev.modern.ie/platform/status/objectobserve/">MS Edge platform status entry</a></p> + +<h2 id="같이_보기">같이 보기</h2> + +<ul> + <li>{{jsxref("Object.unobserve()")}} {{experimental_inline}}</li> + <li>{{jsxref("Array.observe()")}} {{experimental_inline}}</li> +</ul> |