JavaScript201708/WEEK3/DAY3/20170810.html at master · code-brewer/JavaScript201708 · GitHub

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<h4 id="20170810">20170810</h4>

<blockquote>
  <p>KWC(开胃菜) <br>
  封装一枚检测数据类型的方法库</p>
</blockquote>

<pre class="prettyprint with-line-number hljs-dark"><code class="language-javascript hljs"><span class="hljs-comment line-number">1.</span>~<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{<br><span class="hljs-comment line-number">2.</span>    <span class="hljs-keyword">var</span> obj = {<br><span class="hljs-comment line-number">3.</span>        <span class="hljs-attr">isNumber</span>: <span class="hljs-string">'Number'</span>,<br><span class="hljs-comment line-number">4.</span>        <span class="hljs-attr">isString</span>: <span class="hljs-string">'String'</span>,<br><span class="hljs-comment line-number">5.</span>        <span class="hljs-attr">isBoolean</span>: <span class="hljs-string">'Boolean'</span>,<br><span class="hljs-comment line-number">6.</span>        <span class="hljs-attr">isNull</span>: <span class="hljs-string">'Null'</span>,<br><span class="hljs-comment line-number">7.</span>        <span class="hljs-attr">isUndefined</span>: <span class="hljs-string">'Undefined'</span>,<br><span class="hljs-comment line-number">8.</span>        <span class="hljs-attr">isPlanObject</span>: <span class="hljs-string">'Object'</span>,<br><span class="hljs-comment line-number">9.</span>        <span class="hljs-attr">isArray</span>: <span class="hljs-string">'Array'</span>,<br><span class="hljs-comment line-number">10.</span>        <span class="hljs-attr">isRegExp</span>: <span class="hljs-string">'RegExp'</span>,<br><span class="hljs-comment line-number">11.</span>        <span class="hljs-attr">isDate</span>: <span class="hljs-string">'Date'</span>,<br><span class="hljs-comment line-number">12.</span>        <span class="hljs-attr">isFunction</span>: <span class="hljs-string">'Function'</span><br><span class="hljs-comment line-number">13.</span>    };<br><span class="hljs-comment line-number">14.</span>    <span class="hljs-keyword">var</span> checkType = {};<br><span class="hljs-comment line-number">15.</span>    <span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> key <span class="hljs-keyword">in</span> obj) {<br><span class="hljs-comment line-number">16.</span>        <span class="hljs-keyword">if</span> (!obj.hasOwnProperty(key)) <span class="hljs-keyword">continue</span>;<br><span class="hljs-comment line-number">17.</span><br><span class="hljs-comment line-number">18.</span>        checkType[key] = (<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{<br><span class="hljs-comment line-number">19.</span>            <span class="hljs-keyword">var</span> className = obj[key];<br><span class="hljs-comment line-number">20.</span>            <span class="hljs-keyword">return</span> <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">val</span>) </span>{<br><span class="hljs-comment line-number">21.</span>                <span class="hljs-keyword">var</span> reg = <span class="hljs-keyword">new</span> <span class="hljs-built_in">RegExp</span>(<span class="hljs-string">'\\[object '</span> + className + <span class="hljs-string">'\\]'</span>);<br><span class="hljs-comment line-number">22.</span>                <span class="hljs-keyword">return</span> reg.test(<span class="hljs-built_in">Object</span>.prototype.toString.call(val));<br><span class="hljs-comment line-number">23.</span>            }<br><span class="hljs-comment line-number">24.</span>        })();<br><span class="hljs-comment line-number">25.</span>    }<br><span class="hljs-comment line-number">26.</span>    <span class="hljs-built_in">window</span>.checkType = checkType;<br><span class="hljs-comment line-number">27.</span>}();<br></code></pre></div></body></html>