Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
518 views
in Technique[技术] by (71.8m points)

html - Disabling android's chrome pull-down-to-refresh feature

I've created a small HTML5 web application for my company.

This application displays a list of items and everything works fine.

The application is mainly used on android phones and Chrome as browser. Also, the site is saved on the home screen so Android manage the whole thing as an app (using a WebView I guess).

Chrome Beta (and I think also the Android System WebView) has introduced a "pull down to refresh" feature (See this link for example).

This is an handy feature but I was wondering if it can be disabled with some meta tag (or javascript stuff) because the refresh can be easily triggered by the user while navigating the list and the whole app is reloaded.

Also this is a feature not needed by the application.

I know that this feature is still available only in Chrome beta, but I have the sensation that this is landing on the stable app, too.

Thank you!

Edit: I've uninstalled Chrome Beta and the link pinned to the home screen now opens with the stable Chrome. So the pinned links starts with Chrome and not with a webview.

Edit: today (2015-03-19) the pull-down-to-refresh has come to the stable chrome.

Edit: from @Evyn answer I follow this link and got this javascript/jquery code that work.

var lastTouchY = 0;
var preventPullToRefresh = false;

$('body').on('touchstart', function (e) {
    if (e.originalEvent.touches.length != 1) { return; }
    lastTouchY = e.originalEvent.touches[0].clientY;
    preventPullToRefresh = window.pageYOffset == 0;
});

$('body').on('touchmove', function (e) {
    var touchY = e.originalEvent.touches[0].clientY;
    var touchYDelta = touchY - lastTouchY;
    lastTouchY = touchY;
    if (preventPullToRefresh) {
        // To suppress pull-to-refresh it is sufficient to preventDefault the first overscrolling touchmove.
        preventPullToRefresh = false;
        if (touchYDelta > 0) {
            e.preventDefault();
            return;
        }
    }
});
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

The default action of the pull-to-refresh effect can be effectively prevented by doing any of the following :

  1. preventDefault’ing some portion of the touch sequence, including any of the following (in order of most disruptive to least disruptive):
    • a. The entire touch stream (not ideal).
    • b. All top overscrolling touchmoves.
    • c. The first top overscrolling touchmove.
    • d. The first top overscrolling touchmove only when 1) the initial touchstart occurred when the page y scroll offset was zero and 2) the touchmove would induce top overscroll.
  2. Applying “touch-action: none” to touch-targeted elements, where appropriate, disabling default actions (including pull-to-refresh) of the touch sequence.
  3. Applying “overflow-y: hidden” to the body element, using a div for scrollable content if necessary.
  4. Disabling the effect locally via chrome://flags/#disable-pull-to-refresh-effect).

See more


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...