We have a SPFx Web Part which uses the A tag with href='#' to create dropdown menus(clicking the tag shows a dropdown menu). The tag works well in a Classic page, however, when the Web Part is added to the new modern site page, clicking the tag will cause the Web Part re-rendered (the render() function of Web Part gets called).

This issue seems to be browser-related. It happens in IE 11 and Chrome, but not in Firefox 53.

To reproduce the issue with the Hello World Web Part, simply replace the render() function with following code:

public render(): void { 
    alert('render() called by clicking the A tag'); 
    this.domElement.innerHTML = '<a href="#" onclick="return false;">Click me</a>'; 

The same issue was reported in Github (https://github.com/SharePoint/sp-dev-docs/issues/586), but not have an answer yet.

Any suggestions or workaround will be appreciated.

Again, I only see this issue happens on a SharePoint Online Modern page. It doesn't happen on the classic page, neither the Workbench page. I am able to reproduce it with IE and Chrome, not the Firefox.

  • I think you may need to attach an event handler to the onClick that returns false to prevent the page from reloading. Are you sure you don't have that backwards, I would expect a classic page to reload, but not a modern page, – russellg Jun 15 '17 at 1:33
  • may be related to github.com/OfficeDev/office-ui-fabric-react/issues/462 – russellg Jun 15 '17 at 1:40
  • Looks like React is forcing an iron chastity belt on you... stackoverflow.com/questions/41668430/… – Danny '365CSI' Engelman Jun 15 '17 at 5:54
  • Thanks Russellg and Danny for your comments. Yes, the same code works in the Classic page, but not on the Modern page. I did try to add "return false;" to the onclick event with no luck. – Matthew Hong Jun 19 '17 at 12:48
  • do you have an href='#' on the tag? can you share the code? – russellg Jun 20 '17 at 22:05

Use like this document.getElementById("id").onclick = this.LikeClicked.bind(this);

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