Search Data not working Angular NodeJS API - node.js

Question

i am created the search part using angular and node js. i have tested through the postman it is working fine. when connect with frond end anqular application is it not working error displayed
Failed to load resource: the server responded with a status of 404 (Not Found)
what i tried so far i attached below please check.
i tried on the url http://localhost:9001/user/findOne?first_name=kobinath
this is working well on postman but tested through the anqular didn't work. i attached the code what i tried so far.
employee.component.ts
search()
{
let name= {
"first_name" : this.first_name
};
this.http.post("http://localhost:9001/user/findOne",name).subscribe((resultData: any)=>
{
console.log(resultData);
});
}
employee.component.html
<form>
<div class="form-group">
<label>First Name</label>
<input type="text" [(ngModel)]="first_name" [ngModelOptions]="{standalone: true}" class="form-control" id="name" placeholder="Enter Name">
</div>
<button type="submit" class="btn btn-primary mt-4" (click)="search()" >Search</button>
</form>
</div>

Answer 1

What I noticed: With Postman you send first_name as a query parameter, but in your Angular-code you attach it to the request-body.
To achieve the equivalent of what you do in Postman, you could use the following code:
search(firstName: string) {
const params = new HttpParams().set('first_name', firstName);
const body = {
first_name : firstName
};
this.http.post("http://localhost:9001/user/findOne", body, { params: params })
.subscribe((resultData: any)=>
{
console.log(resultData);
});
}
Btw: Why don't you use GET instead of POST?