Touch UI back and forward buttons for FireFox

Fixing FireFox Touch navigation
目前為 2022-02-14 提交的版本，檢視最新版本。
安裝腳本 ?
換行
// ==UserScript==
// @name         Touch UI back and forward buttons for FireFox
// @namespace    [email protected]
// @version      0.1
// @description  Fixing FireFox Touch navigation
// @author       Tony Fabian
// @include      *://*/*
// @grant        none
// @noframes
// @license MIT
// ==/UserScript==
(function () {
    window.addEventListener('load', function () {
        var bodyTag = document.getElementsByTagName("body");
        if (bodyTag != null) {
            var body = bodyTag[0];
            if (body != null) {
                var clientX, clientY;
                body.addEventListener('touchstart', function (e) {
                    // Cache the client X/Y coordinates
                    clientX = e.touches[0].clientX;
                    clientY = e.touches[0].clientY;
                }, false);
                body.addEventListener('touchend', function (e) {
                    var deltaX, deltaY;
                    // Compute the change in X and Y coordinates.
                    // The first touch point in the changedTouches
                    // list is the touch point that was just removed from the surface.
                    deltaX = e.changedTouches[0].clientX - clientX;
                    deltaY = e.changedTouches[0].clientY - clientY;
                    if (deltaX <= -75) {
                        console.log("navigate back");
                        history.back();
                    }
                    if (deltaX >= 75) {
                        console.log("navigate forward");
                        history.forward();
                    }
                }, false);
            }
        }
    });
})();
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