Tooltip: when go to another route, got null error

[kuchaguangjie]

Describe the bug Added a <Tooltip>, when goto another route by clicking an icon, got following error in console:

Tooltip.svelte:180 Uncaught TypeError: Cannot read properties of null (reading 'addEventListener')
    at Object.registerEventHandler (Tooltip.svelte:180:23)
    at MDCTooltipFoundation2.show (foundation.ts:403:20)
    at foundation.ts:201:14
registerEventHandler	@	Tooltip.svelte:180
MDCTooltipFoundation2.show	@	foundation.ts:403
(anonymous)	@	foundation.ts:201
setTimeout (async)		
MDCTooltipFoundation2.handleAnchorMouseEnter	@	foundation.ts:200
handleAnchorMouseEnter

Desktop (please complete the following information):

• OS: Linux
• Browser: Chrome 104.0.5112.79 (Official Build) (64-bit)
• Version: 6.1.3

Maybe in Tooltip.svelte, should change to:

        registerEventHandler: (evt, handler) => {
            getElement().addEventListener(evt, handler);
        },

to

        registerEventHandler: (evt, handler) => {
            getElement()?.addEventListener(evt, handler);
        },

I'm not sure.

[Max-Makhrov]

Having the same issue:

Uncaught TypeError: Cannot read properties of null (reading 'addEventListener')
    at Object.registerEventHandler (@smui_tooltip.js?v=7894914c:2034:21)
    at MDCTooltipFoundation2.show (@smui_tooltip.js?v=7894914c:510:22)
    at @smui_tooltip.js?v=7894914c:385:17

If click the button before the tooltip appears.