If you are using jsTree library and found out that Chrome has started to warn about deprecating a feature used by jstree like below. Then you can find what you need to do to resolve this issue (warning).
document.registerElement is deprecated and will be removed in M73, around March 2019. Please use window.customElements.define instead. See https://www.chromestatus.com/features/4642138092470272 for more details.