How to create an ajax endpoint without js?

Question

When using JS fetch api with the wordpress is set up your issue is with the body.

fetch passes body data in a way that wordpress can’t understand.

Your body: {} should be like this

body: new URLSearchParams({
    username: 'thewhitefang',
    password: '@bhishek01',
    action: 'login_ajax'
})

and you need to change your content-type as well. 'Content-Type': 'application/x-www-form-urlencoded'

I can’t really explain it well because i never really dived deep into this subject but im sure you could find everything you need about this.

Hope this helps =]