The difference between the ready function of jquery and the onload of JS

The difference between the ready function of jquery and the onload of JS:
1. Execution time
Window.onload must wait until all the elements of the page that include the picture have been loaded before they can be executed.
$ (document). Ready () is executed when the DOM structure is drawn and does not have to wait for the load to complete.

2. Different writing numbers
Window.onload cannot write multiple at the same time, if there are multiple window.onload methods, only one
$ (document). Ready () can be written multiple at the same time and can be executed

3. Simplified notation
Window.onload No simplified notation
$ (document). Ready (function () {}) can be simply written as $ (function () {});

The difference between the ready function of jquery and the onload of JS