iframe和frame的区别是什么？iframe和frame的区别总结-html教程-PHP中文网

本篇文章给大家带来的内容是关于iframe和frame的区别是什么？iframe和frame的区别总结，有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。【推荐阅读：html5教程】
iframe和frame的区别是什么？iframe和frame的区别总结
iframe有那些缺点？
iframe会阻塞主页面的Onload事件
搜索引擎的检索程序无法解读这种页面，不利于SEO
iframe和主页面共享连接池，而浏览器对相同域的连接有限制，所以会影响页面的并行加载
使用iframe之前需要考虑这两个缺点。如果需要使用iframe，最好是通过javascript动态给iframe添加src属性值，这样可以绕开以上两个问题
iframe和frame的区别
frame不能脱离frameSet单独使用，iframe可以；
frame不能放在body中；
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下面代码可以正常显示
如下代码则不可以正常显示
嵌套在frameSet中的iframe必需放在body中；



</frameset>
</body></pre><p>如下不能正常显示：</p><pre class="brush:html;toolbar:false"><!--<body>-->
<frameset>
<iframe   name="frame1"   src="test.html"/>
</frameset>
<!--</body>--></pre><p>不嵌套在frameSet中的iframe可以随意使用；</p><pre class="brush:html;toolbar:false"><body>
<iframe   name="frame"   src="test.html"/>
</body>
<!--<body>-->
<iframe   name="frame"   src="test.html"/> s
<!--</body>--></pre><p>frame的高度只能通过frameSet控制；iframe可以自己控制，不能通过frameSet控制</p>
<p>如果在同一个页面使用了两个以上的iframe，在IE中可以正常显示，在firefox中只能显示出第一个；使用两个以上的frame在IE和firefox中均可正常。</p>					</div>
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									<p class="aClass flexRow hotztrp overflowclass">在js中，可以利用array对象的length属性来获取数组长度，该属性可设置或返回数组中元素的数目，只需要使用“array.length”语句即可返回表示数组对象的元素个数的数值，也就是长度值。php中文网还提供JavaScript数组的相关下载、相关课程等内容，供大家免费下载使用。</p>
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											<p class="">477</p>
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									<p class="aClass flexRow hotztrp overflowclass">JavaScript启用方法有内联脚本、内部脚本、外部脚本和异步加载。详细介绍：1、内联脚本是将JavaScript代码直接嵌入到HTML标签中；2、内部脚本是将JavaScript代码放置在HTML文件的`&lt;script&gt;`标签中；3、外部脚本是将JavaScript代码放置在一个独立的文件；4、外部脚本是将JavaScript代码放置在一个独立的文件。</p>
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									<p class="aClass flexRow hotztrp overflowclass">javascript中的Symbol数据类型是一种基本数据类型，用于表示独一无二的值。Symbol的特点：1、独一无二，每个Symbol值都是唯一的，不会与其他任何值相等；2、不可变性，Symbol值一旦创建，就不能修改或者重新赋值；3、隐藏性，Symbol值不会被隐式转换为其他类型；4、无法枚举，Symbol值作为对象的属性名时，默认是不可枚举的。</p>
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											<p class="">551</p>
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											<p>2023.09.20</p>
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									<p class="aClass flexRow hotztrp overflowclass">本专题系统讲解 C++ 在单元测试与代码质量保障方面的实战方法，包括测试驱动开发理念、Google Test/Google Mock 的使用、测试用例设计、边界条件验证、持续集成中的自动化测试流程，以及常见代码质量问题的发现与修复。通过工程化示例，帮助开发者建立 可测试、可维护、高质量的 C++ 项目体系。</p>
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