Images in the post are not responsive

[LiamBommer]

I inserted an image in my post with markdown syntax:
![](image_url)

And it turns out it's not responsive and the image's width exceeds the screen. How can I solve this problem?

[LiamBommer]

I've solved this problem by inserting HTML code like:
<image src='src' class='img-fluid' />

But I wonder if there is another way...

[tanzanite999]

I also have this question