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DBW: use touch-action instead of restricting movement in code

See original GitHub issue

CSS touch-action is a more performant way to restrict touch movement of a region.

https://developer.mozilla.org/en-US/docs/Web/CSS/touch-action

We can probably use the document level event listener gatherer for this.

http://jsbin.com/qibakekiri/edit?html,output

Issue Analytics

State:
Created 7 years ago
Comments:12 (8 by maintainers)

Top GitHub Comments

1reaction

ebidelcommented, Dec 14, 2016

We changed it to be all event listeners on the page. The gatherer collects all listeners within body and window/document: https://github.com/GoogleChrome/lighthouse/blob/master/lighthouse-core/gather/gatherers/dobetterweb/all-event-listeners.js#L132. Some of the code comments need to be updated.

0reactions

paulirishcommented, Mar 8, 2018

Could we boil this down to: If a listener on an element calls preventDefault, but doesn’t have a touch-action set, issue a warning?

Seems about right. Looks excellent for emitting a violation into the console. Good for devtools and LH can absorb that.

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