我想读一个网站的源代码,例如.当我使用浏览器的开发者工具时,html标签就像
<html lang="en-CA" class="js flexbox canvas canvastext webgl touch geolocation postmessage websqldatabase indexeddb hashchange history draganddrop websockets rgba hsla multiplebgs backgroundsize borderimage borderradius boxshadow textshadow opacity cssanimations csscolumns cssgradients cssreflections csstransforms csstransforms3d csstransitions fontface video audio localstorage sessionstorage webworkers applicationcache svg inlinesvg smil svgclippaths wf-leaguegothic1leaguegothic2-n4-active wf-lemondecourrier1lemondecourrier2-n4-active wf-lemondecourrier1lemondecourrier2-i4-active wf-lemondecourrier1lemondecourrier2-n7-active wf-lemondecourrier1lemondecourrier2-i7-active wf-active">
但是,当我使用view-source:browsehappy.com时,事实证明是这样的
<html lang="en-CA" class="no-js">
那么,当我需要查看当前页面的源代码时,为什么要使用差异和哪种方式呢？