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Co-authored-by: Laurent Cozic <laurent22@users.noreply.github.com> Co-authored-by: Henry Heino <46334387+personalizedrefrigerator@users.noreply.github.com>
2 lines
3.3 KiB
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2 lines
3.3 KiB
HTML
<!-- this is from: https://blog.csdn.net/ch5256865/article/details/52957360 -->
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<pre data-index="0" class="set-code-show" name="code" style="font-family: Consolas, Inconsolata, Courier, monospace;"><code class="hljs language-javascript"><ol class="hljs-ln" style="width:100%"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">let</span> str = <span class="hljs-string">` hello world ! `</span>;</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">let</span> _trim = <span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) {</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-variable language_">this</span> == <span class="hljs-string">"number"</span>) <span class="hljs-keyword">new</span> <span class="hljs-title class_">Error</span>(<span class="hljs-string">"Invalid or unexpected token"</span>);</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-variable language_">this</span> !== <span class="hljs-string">"string"</span>)</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-keyword">new</span> <span class="hljs-title class_">Error</span>(<span class="hljs-string">"Cannot read property 'trim' of"</span> + <span class="hljs-variable language_">this</span>);</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-keyword">let</span> reg = <span class="hljs-regexp">/^\s*|\s*$/g</span>;</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-keyword">return</span> <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">replace</span>(reg, <span class="hljs-string">""</span>);</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">};</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-title class_">String</span>.<span class="hljs-property"><span class="hljs-keyword">prototype</span></span>.<span class="hljs-property">_trim</span> = _trim;</div></div></li></ol></code></pre> |