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<!doctype html>
<html class="theme-next pisces use-motion">
<head>
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IE BUG
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<p>1.IE7下虚边框outline:none无效问题<br><figure class="highlight"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">a { *blr: expression(this.onFocus=this.blur()); }</span><br></pre></td></tr></table></figure></p>
<p>2.IE7下iframe大小变化不触发window resize<br><figure class="highlight"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">body {</span><br><span class="line"> *position: absolute;</span><br><span class="line"> *height:100%;</span><br><span class="line"> *width:100%;</span><br><span class="line">}</span><br></pre></td></tr></table></figure></p>
<p>3.IE7下jquery动画bug<br><figure class="highlight"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">div: {</span><br><span class="line"> *position:relative;</span><br><span class="line"> *zoom:1;</span><br><span class="line">}</span><br></pre></td></tr></table></figure></p>
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<a class="post-title-link" href="/2015/12/21/异步加载模块/" itemprop="url">
异步加载模块
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<p>test.html<br><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="title">html</span>></span></span><br><span class="line"><span class="tag"><<span class="title">head</span>></span><span class="tag"></<span class="title">head</span>></span></span><br><span class="line"><span class="tag"><<span class="title">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">button</span> <span class="attribute">id</span>=<span class="value">"btn"</span>></span>test<span class="tag"></<span class="title">button</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"amd.js"</span>></span><span class="undefined"></span><span class="tag"></<span class="title">script</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">script</span>></span><span class="javascript"></span><br><span class="line"> <span class="built_in">require</span>([<span class="string">'m1'</span>], <span class="function"><span class="keyword">function</span>(<span class="params">m1</span>) </span>{</span><br><span class="line"> m1.log();</span><br><span class="line"> });</span><br><span class="line"> <span class="built_in">document</span>.getElementById(<span class="string">'btn'</span>).onclick=<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="built_in">require</span>([<span class="string">'m1'</span>], <span class="function"><span class="keyword">function</span>(<span class="params">m1</span>) </span>{</span><br><span class="line"> m1.log();</span><br><span class="line"> });</span><br><span class="line"> }</span><br><span class="line"> </span><span class="tag"></<span class="title">script</span>></span></span><br><span class="line"><span class="tag"></<span class="title">body</span>></span></span><br><span class="line"><span class="tag"></<span class="title">html</span>></span></span><br></pre></td></tr></table></figure></p>
<p>m1.js<br><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">define(<span class="string">'m1'</span>, [<span class="string">'m2'</span>], <span class="function"><span class="keyword">function</span>(<span class="params">m2</span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="string">'load module1'</span>);</span><br><span class="line"> <span class="keyword">return</span> {</span><br><span class="line"> log: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> m2.log();</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="string">'this is module1.'</span>);</span><br><span class="line"> }</span><br><span class="line"> };</span><br><span class="line">});</span><br></pre></td></tr></table></figure></p>
<p>m2.js<br><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">define(<span class="string">'m2'</span>, <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="string">'load module2'</span>);</span><br><span class="line"> <span class="keyword">return</span> {</span><br><span class="line"> log: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="string">'this is module2.'</span>);</span><br><span class="line"> }</span><br><span class="line"> };</span><br><span class="line">});</span><br></pre></td></tr></table></figure></p>
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<a class="post-title-link" href="/2015/12/16/异步等待/" itemprop="url">
异步等待
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2015-12-16
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<blockquote>
<p><strong>等待者模式:</strong> <em>通过对多个异步进程监听，来触发未来发生的动作。</em><br><strong>应用场景:</strong> <em>对setTimeout、ajax等异步操作进行监听，当指定的多个异步操作完成后再统一执行回调函数。</em></p>
</blockquote>
<pre><code class="js"><span class="keyword">var</span> Waiter = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">var</span> dfd = [],
doneArr = [],
failArr = [],
slice = <span class="built_in">Array</span>.prototype.slice,
that = <span class="keyword">this</span>;
<span class="keyword">var</span> <span class="built_in">Promise</span> = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">this</span>.resolved = <span class="literal">false</span>;
<span class="keyword">this</span>.rejected = <span class="literal">false</span>;
};
<span class="built_in">Promise</span>.prototype = {
resolve: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">this</span>.resolved = <span class="literal">true</span>;
<span class="keyword">if</span>(!dfd.length) <span class="keyword">return</span>;
<span class="keyword">for</span>(<span class="keyword">var</span> i=dfd.length-<span class="number">1</span>;i>=<span class="number">0</span>;i--) {
<span class="keyword">if</span>(dfd[i] && !dfd[i].resolved || dfd[i].rejected) {
<span class="keyword">return</span>;
}
dfd.splice(i,<span class="number">1</span>);
};
_exec(doneArr);
},
reject: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">this</span>.rejected = <span class="literal">true</span>;
<span class="keyword">if</span>(!dfd.length) <span class="keyword">return</span>;
dfd.splice(<span class="number">0</span>);
_exec(failArr);
}
};
<span class="keyword">this</span>.Deferred = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">return</span> <span class="keyword">new</span> <span class="built_in">Promise</span>();
};
<span class="function"><span class="keyword">function</span> <span class="title">_exec</span>(<span class="params">arr</span>) </span>{
<span class="keyword">var</span> i = <span class="number">0</span>,
len = arr.length;
<span class="keyword">for</span>(;i<len;i++) {
<span class="keyword">try</span>{
arr[i] && arr[i]();
} <span class="keyword">catch</span>(e) {}
}
};
that.when = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
dfd = slice.call(<span class="built_in">arguments</span>);
<span class="keyword">var</span> i = dfd.length;
<span class="keyword">for</span>(--i; i>=<span class="number">0</span>; i--) {
<span class="keyword">if</span>(!dfd[i] || dfd[i].resolved || dfd[i].rejected || !dfd[i] <span class="keyword">instanceof</span> <span class="built_in">Promise</span>) {
dfd.splice(i,<span class="number">1</span>);
};
};
<span class="keyword">return</span> that;
};
that.done = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
doneArr = doneArr.concat(slice.call(<span class="built_in">arguments</span>));
<span class="keyword">return</span> that;
};
that.fail = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
failArr = failArr.concat(slice.call(<span class="built_in">arguments</span>));
<span class="keyword">return</span> that;
};
};
<span class="keyword">var</span> waiter = <span class="keyword">new</span> Waiter();
<span class="keyword">var</span> first = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">var</span> dtd = waiter.Deferred();
setTimeout(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="built_in">console</span>.log(<span class="string">'first finish'</span>);
dtd.resolve();
}, <span class="number">2000</span>);
<span class="keyword">return</span> dtd;
}();
<span class="keyword">var</span> second = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="keyword">var</span> dtd = waiter.Deferred();
setTimeout(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="built_in">console</span>.log(<span class="string">'second finish'</span>);
dtd.resolve();
}, <span class="number">5000</span>);
<span class="keyword">return</span> dtd;
}();
waiter.when(first, second).done(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="built_in">console</span>.log(<span class="string">'success'</span>);
}, <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="built_in">console</span>.log(<span class="string">'success again'</span>);
}).fail(<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{
<span class="built_in">console</span>.log(<span class="string">'fail'</span>);
});
</code></pre>
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<a class="post-title-link" href="/2015/11/05/发布-订阅模式/" itemprop="url">
发布-订阅模式
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<blockquote>
<p><strong>发布-订阅模式:</strong> <em>定义了一种一对多的依赖关系，让多个订阅者对象同时监听某一个主题对象。这个主题对象在自身状态变化时，会通知所有订阅者对象，使它们能够自动更新自己的状态。</em></p>
</blockquote>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> Event = (<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> list = {},</span><br><span class="line"> listen,</span><br><span class="line"> trigger,</span><br><span class="line"> remove;</span><br><span class="line"></span><br><span class="line"> listen = <span class="function"><span class="keyword">function</span>(<span class="params">name, callback</span>) </span>{</span><br><span class="line"> <span class="keyword">if</span>(!list[name]) {</span><br><span class="line"> list[name] = [];</span><br><span class="line"> };</span><br><span class="line"> list[name].push(callback);</span><br><span class="line"> };</span><br><span class="line"></span><br><span class="line"> trigger = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> name = [].shift.call(<span class="built_in">arguments</span>),</span><br><span class="line"> callbacks = list[name];</span><br><span class="line"> <span class="keyword">if</span>(!callbacks || callbacks.length == <span class="number">0</span>) {</span><br><span class="line"> <span class="keyword">return</span> <span class="literal">false</span>;</span><br><span class="line"> };</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">var</span> i=<span class="number">0</span>,callback;callback=callbacks[i++];) {</span><br><span class="line"> callback.apply(<span class="keyword">this</span>, <span class="built_in">arguments</span>);</span><br><span class="line"> }</span><br><span class="line"> };</span><br><span class="line"> remove = <span class="function"><span class="keyword">function</span>(<span class="params">name, callback</span>) </span>{</span><br><span class="line"> <span class="keyword">var</span> callbacks = list[name];</span><br><span class="line"> <span class="keyword">if</span>(!callbacks || callbacks.length === <span class="number">0</span>) {</span><br><span class="line"> <span class="keyword">return</span> <span class="literal">false</span>;</span><br><span class="line"> };</span><br><span class="line"> <span class="keyword">if</span>(!callback) {</span><br><span class="line"> callbacks && (callbacks.length = <span class="number">0</span>);</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">var</span> i=<span class="number">0</span>,l=callbacks.length;i<l;i++) {</span><br><span class="line"> <span class="keyword">var</span> _callback = callbacks[i];</span><br><span class="line"> <span class="keyword">if</span>(_callback === callback) {</span><br><span class="line"> callbacks.splice(i, <span class="number">1</span>);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> };</span><br><span class="line"> };</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> {</span><br><span class="line"> listen: listen,</span><br><span class="line"> trigger: trigger,</span><br><span class="line"> remove: remove</span><br><span class="line"> };</span><br><span class="line">})();</span><br><span class="line"></span><br><span class="line">Event.listen(<span class="string">'msg'</span>, a = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="string">'a: '</span>+[].slice.call(<span class="built_in">arguments</span>));</span><br><span class="line">});</span><br><span class="line"></span><br><span class="line">Event.listen(<span class="string">'msg'</span>, b = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="string">'b: '</span>+[].slice.call(<span class="built_in">arguments</span>));</span><br><span class="line">});</span><br><span class="line"></span><br><span class="line">Event.trigger(<span class="string">'msg'</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>);</span><br><span class="line">Event.remove(<span class="string">'msg'</span>, a);</span><br><span class="line">Event.trigger(<span class="string">'msg'</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>);</span><br></pre></td></tr></table></figure>
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迭代器模式
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<p><strong>迭代器模式:</strong> <em>提供一种方法顺序访问一个聚合对象中的各种元素，而又不暴露该对象的内部表示。</em></p>
</blockquote>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> each = <span class="function"><span class="keyword">function</span>(<span class="params">obj, callback</span>) </span>{</span><br><span class="line"> <span class="keyword">switch</span>(<span class="built_in">Object</span>.prototype.toString.call(obj)) {</span><br><span class="line"> <span class="keyword">case</span> <span class="string">'[object Array]'</span>:</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">var</span> i=<span class="number">0</span>,l=obj.length;i<l;i++) {</span><br><span class="line"> <span class="keyword">if</span>(callback.call(obj[i], i, obj[i]) === <span class="literal">false</span>) {</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> <span class="keyword">case</span> <span class="string">'[object Object]'</span>:</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">var</span> k <span class="keyword">in</span> obj) {</span><br><span class="line"> <span class="keyword">if</span>(callback.call(obj[k], k, obj[k]) === <span class="literal">false</span>) {</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> };</span><br><span class="line">};</span><br><span class="line"></span><br><span class="line">each([<span class="string">'a'</span>,<span class="string">'b'</span>,<span class="string">'c'</span>], <span class="function"><span class="keyword">function</span>(<span class="params">i, o</span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="keyword">this</span>);</span><br><span class="line"> alert(i+<span class="string">' : '</span>+o);</span><br><span class="line">});</span><br><span class="line"></span><br><span class="line">each({a:<span class="number">1</span>,b:<span class="number">2</span>,c:<span class="number">3</span>}, <span class="function"><span class="keyword">function</span>(<span class="params">k, v</span>) </span>{</span><br><span class="line"> <span class="built_in">console</span>.log(<span class="keyword">this</span>);</span><br><span class="line"> alert(k+<span class="string">' : '</span>+v);</span><br><span class="line">});</span><br></pre></td></tr></table></figure>
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