Js or jquery determine whether the image is loaded to complete the implementation code

Sometimes the width and height of an image are required to define the size of the image on the webpage. However, you need to request the image from the server and download it to the local device, some js or jquery code is executed before the image is loaded. What should we do?

Jquery provides a method:Copy codeThe Code is as follows: 01. $ (""). load (function (){...});

The selector is the image id or class, and the method in the function is the callback function, which is executed after the image is loaded. However, I have tried a lot and the root cause is not that, the correct solution is:

Use the onload method of js:Copy codeThe Code is as follows: document. getElementById (""). onload = function (){};

The experiment results are feasible.