Here is an answer,Let try this once,
html file,
<img [src]="imagesource" (load)="doSomething()">
<!--(or)-->
<img src="https://i.pinimg.com/736x/2c/9d/07/2c9d0704ae49dfde914e2b477bf9279c--stick-figure-profile-pictures.jpg" (load)="doSomething()">
Typescript file,
imagesource="https://i.pinimg.com/736x/2c/9d/07/2c9d0704ae49dfde914e2b477bf9279c--stick-figure-profile-pictures.jpg";
doSomething(){
console.log("Loaded");
//do your stuff
}
For more reference visit here
Detect when image has loaded in img tag