为什么我在html文件中找不到svg代码行

So I wanted to add a morris chart to my laravel project and I'm using a template. My question is that when I look at my html code in sublime I can't find the svg line in it but when I look at it from my browser using "inspect" I get multiple lines of code that I can't find in the html file.

Those svg create by morris chart you have #morris-bar-chart on based on that morris chart init and create those svg while rendering on browser.